/* ===================================
   TENARIS 4.0 — Smart Factory Solutions for Steel Tubes
   Main Stylesheet
   =================================== */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* === Tenaris Brand Palette === */
  --tenaris-magenta: #B01B8D;
  --tenaris-green:   #00A651;
  --tenaris-blue:    #0072B1;
  --tenaris-gray:    #88888C;

  /* === Primary (Tenaris Blue) === */
  --primary:       #0072B1;
  --primary-dark:  #005a8e;
  --primary-light: #1a8fd4;

  /* === Accent (Tenaris Magenta como destaque) === */
  --accent:  #B01B8D;
  --accent2: #00A651;   /* Tenaris Green para tags de sucesso / CTAs secundários */

  /* === Backgrounds — dark theme sobre preto Tenaris === */
  --dark:    #0a0a0a;   /* quase preto — próximo ao Black #000000 */
  --dark2:   #111111;
  --dark3:   #181818;
  --surface: #1a1a1a;
  --surface2:#212121;
  --surface3:#282828;

  /* === Texto === */
  --text:       #f0f0f2;
  --text-muted: #88888C;   /* Tenaris Gray */
  --text-dim:   #55555a;

  /* === Bordas e brilhos derivados das cores Tenaris === */
  --border:  rgba(0,114,177,0.22);    /* blue tint */
  --border2: rgba(176,27,141,0.15);   /* magenta tint */
  --glow:    rgba(0,114,177,0.45);    /* blue glow */
  --glow2:   rgba(176,27,141,0.35);   /* magenta glow */
  --glow3:   rgba(0,166,81,0.35);     /* green glow */

  /* === Semânticas === */
  --success: #00A651;   /* Tenaris Green */
  --warning: #f0a500;
  --danger:  #e03030;

  /* === Utilitários === */
  --radius:    12px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --shadow:    0 4px 24px rgba(0,0,0,0.6);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.7);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark2); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
h4 { font-size: 1.2rem; }
p { color: var(--text-muted); line-height: 1.7; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-light); }

/* --- Container --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-wide { max-width: 1400px; }
.container-narrow { max-width: 900px; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 20px var(--glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--glow);
  color: #fff;
}
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-secondary:hover {
  background: var(--surface);
  border-color: var(--primary);
  color: var(--accent);
}
.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--primary));
  color: #fff;
  box-shadow: 0 4px 20px var(--glow2);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--glow2);
  color: #fff;
}
.btn-lg { padding: 18px 36px; font-size: 1.05rem; }
.btn-sm { padding: 10px 20px; font-size: 0.85rem; }

/* --- Tags & Badges --- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.tag-primary { background: rgba(0,114,177,0.15); color: var(--primary-light); border: 1px solid var(--border); }
.tag-success { background: rgba(0,204,136,0.1); color: var(--success); border: 1px solid rgba(0,204,136,0.2); }
.tag-warning { background: rgba(255,170,0,0.1); color: var(--warning); border: 1px solid rgba(255,170,0,0.2); }
.tag-accent2 { background: rgba(0,166,81,0.12); color: var(--accent2); border: 1px solid rgba(0,166,81,0.25); }

/* --- Cards --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}
.card:hover {
  border-color: var(--primary);
  box-shadow: 0 8px 40px var(--glow);
  transform: translateY(-4px);
}
.card-sm { padding: 24px; border-radius: var(--radius); }

/* --- Section --- */
.section { padding: 100px 0; }
.section-sm { padding: 60px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-header .tag { margin-bottom: 16px; }
.section-header h2 { margin-bottom: 16px; color: var(--text); }
.section-header p { max-width: 600px; margin: 0 auto; font-size: 1.1rem; }

/* --- Grid --- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ===================================
   NAVIGATION
   =================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 12px 0;
  background: #ffffff;
  border-bottom: 1px solid rgba(0,0,0,0.08);
  box-shadow: 0 2px 12px rgba(0,0,0,0.07);
  transition: all var(--transition);
}
.navbar.scrolled {
  background: #ffffff;
  border-bottom: 1px solid rgba(0,0,0,0.12);
  box-shadow: 0 4px 20px rgba(0,0,0,0.10);
  padding: 10px 0;
}
.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.nav-logo-img {
  height: 34px;
  width: auto;
  display: block;
  object-fit: contain;
}
.nav-logo-tenaris {
  height: 28px;
}
.nav-logo-divider {
  width: 1px;
  height: 28px;
  background: rgba(0,0,0,0.15);
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-links a {
  color: #444;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-links a:hover, .nav-links a.active {
  color: var(--primary);
  background: rgba(0,114,177,0.07);
}
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border: none;
  background: none;
}
.nav-mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #333;
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}
/* hero-bg kept for fallback but replaced by video */
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--dark) 0%, var(--dark2) 100%);
}
/* Video background */
.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  z-index: 0;
  pointer-events: none;
}
/* Dark overlay so text stays readable */
.hero-video-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg,
      rgba(5,10,20,0.72) 0%,
      rgba(5,10,20,0.55) 50%,
      rgba(5,10,20,0.80) 100%),
    radial-gradient(ellipse 70% 50% at 30% 50%, rgba(0,114,177,0.22), transparent);
}
.hero-grid {
  position: absolute;
  inset: 0;
  z-index: 2;
  background-image: 
    linear-gradient(rgba(0,114,177,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,114,177,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black, transparent);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 3;
  max-width: 800px;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.hero-eyebrow-line {
  width: 40px;
  height: 2px;
  background: var(--primary);
}
.hero-eyebrow-text {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.hero h1 {
  color: var(--text);
  margin-bottom: 24px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.15rem;
  max-width: 600px;
  margin-bottom: 40px;
  color: var(--text-muted);
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats {
  display: flex;
  gap: 40px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}
.hero-stat-value {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
  margin-bottom: 4px;
}
.hero-stat-value span { color: var(--accent); }
.hero-stat-label { font-size: 0.85rem; color: var(--text-muted); }
.hero-visual {
  position: absolute;
  right: -60px;
  top: 50%;
  transform: translateY(-50%);
  width: 500px;
  height: 500px;
  pointer-events: none;
}

/* ===================================
   SECTION: ABOUT / INTRO
   =================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-content .tag { margin-bottom: 20px; }
.about-content h2 { margin-bottom: 20px; color: var(--text); }
.about-content p { margin-bottom: 16px; }
.about-features { list-style: none; margin-top: 24px; display: flex; flex-direction: column; gap: 12px; }
.about-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-muted);
}
.about-features li::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 20px;
  min-width: 20px;
  border-radius: 50%;
  background: rgba(0,114,177,0.15);
  border: 1px solid var(--primary);
  position: relative;
}
.about-features li::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath fill='%230072B1' d='M5 10l3 3 7-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}
.about-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.about-metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: all var(--transition);
}
.about-metric-card:hover {
  border-color: var(--primary);
  transform: translateX(8px);
}
.about-metric-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.about-metric-value { font-size: 1.8rem; font-weight: 800; color: var(--text); line-height: 1; }
.about-metric-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 2px; }

/* ===================================
   SECTION: PROBLEM
   =================================== */
.problem-section { background: var(--dark2); }
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.problem-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}
.problem-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent2), transparent);
}
.problem-card:hover { transform: translateY(-4px); border-color: rgba(176,27,141,0.35); }
.problem-icon { font-size: 2rem; margin-bottom: 16px; }
.problem-card h3 { font-size: 1.1rem; margin-bottom: 12px; color: var(--text); }
.problem-card p { font-size: 0.9rem; }

/* ===================================
   SECTION: SOLUTION / FEATURES
   =================================== */
.features-section { background: var(--dark); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}
.feature-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.feature-card:hover::after { opacity: 1; }
.feature-card:hover { transform: translateY(-4px); border-color: var(--primary); box-shadow: 0 8px 40px var(--glow); }
.feature-number {
  font-size: 3rem;
  font-weight: 800;
  color: rgba(0,114,177,0.18);
  line-height: 1;
  margin-bottom: 12px;
}
.feature-icon { font-size: 2rem; margin-bottom: 16px; }
.feature-card h3 { font-size: 1.15rem; margin-bottom: 12px; color: var(--text); }
.feature-card p { font-size: 0.9rem; }
.feature-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }

/* ===================================
   SECTION: METRICS / RESULTS
   =================================== */
.metrics-section {
  background: linear-gradient(135deg, var(--dark2), var(--dark3));
  position: relative;
  overflow: hidden;
}
.metrics-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse 60% 80% at 50% 50%, rgba(0,114,177,0.10), transparent);
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  background: var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.metric-item {
  background: var(--surface);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition);
}
.metric-item:hover { background: var(--surface2); }
.metric-value {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
  margin-bottom: 8px;
}
.metric-value span { color: var(--accent); }
.metric-label { font-size: 0.9rem; color: var(--text-muted); }
.metric-sublabel { font-size: 0.8rem; color: var(--text-dim); margin-top: 4px; }

/* ===================================
   SECTION: HOW IT WORKS / PROCESS
   =================================== */
.process-section { background: var(--dark2); }
.process-timeline { position: relative; margin-top: 64px; }
.process-timeline::before {
  content: '';
  position: absolute;
  left: 32px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), transparent);
}
.process-step {
  display: flex;
  gap: 40px;
  margin-bottom: 48px;
  position: relative;
}
.process-step:last-child { margin-bottom: 0; }
.process-step-number {
  width: 64px;
  height: 64px;
  min-width: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  position: relative;
  z-index: 1;
  box-shadow: 0 0 0 4px var(--dark2), 0 0 0 6px var(--primary);
}
.process-step-content {
  flex: 1;
  padding-top: 12px;
}
.process-step-content h3 { margin-bottom: 8px; color: var(--text); font-size: 1.2rem; }
.process-step-content p { font-size: 0.95rem; margin-bottom: 12px; }
.process-step-detail {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: rgba(0,114,177,0.10);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--primary-light);
}

/* ===================================
   SECTION: PRODUCTS / SERVICES
   =================================== */
.products-section { background: var(--dark); }
.products-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 48px; }
.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}
.product-card.featured {
  border-color: var(--primary);
  background: linear-gradient(135deg, var(--surface), var(--surface2));
}
.product-card.featured::before {
  content: 'Recomendado';
  position: absolute;
  top: 20px; right: 20px;
  padding: 4px 12px;
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 100px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.product-icon { font-size: 2.5rem; margin-bottom: 20px; }
.product-card h3 { font-size: 1.3rem; margin-bottom: 8px; color: var(--text); }
.product-card .subtitle { font-size: 0.9rem; color: var(--accent); margin-bottom: 16px; font-weight: 500; }
.product-card p { font-size: 0.9rem; margin-bottom: 20px; }
.product-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.product-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.product-list li::before {
  content: '→';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* ===================================
   SECTION: TESTIMONIAL / CARTA
   =================================== */
.carta-section { background: var(--dark2); }
.carta-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 60px;
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}
.carta-container::before {
  content: '\201C';
  position: absolute;
  top: 20px;
  left: 40px;
  font-size: 8rem;
  color: var(--primary);
  opacity: 0.15;
  line-height: 1;
  font-family: Georgia, serif;
}
.carta-text { font-size: 1.05rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 16px; }
.carta-author { display: flex; align-items: center; gap: 16px; margin-top: 32px; padding-top: 32px; border-top: 1px solid var(--border); }
.carta-author-avatar {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
}
.carta-author-name { font-weight: 700; color: var(--text); }
.carta-author-title { font-size: 0.85rem; color: var(--text-muted); }

/* ===================================
   SECTION: TIMELINE / ROADMAP
   =================================== */
.timeline-section { background: var(--dark); }
.timeline-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; position: relative; margin-top: 48px; }
.timeline-grid::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
}
.timeline-item { padding: 0 20px; text-align: center; }
.timeline-dot {
  width: 80px; height: 80px;
  border-radius: 50%;
  background: var(--surface);
  border: 3px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 1.6rem;
  transition: all var(--transition);
  box-shadow: 0 0 0 6px var(--dark);
}
.timeline-item:hover .timeline-dot {
  background: var(--primary);
  box-shadow: 0 0 0 6px var(--dark), 0 0 24px var(--glow);
}
.timeline-phase { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 8px; }
.timeline-item h4 { font-size: 1rem; color: var(--text); margin-bottom: 8px; }
.timeline-item p { font-size: 0.85rem; }



/* ===================================
   SECTION: DASHBOARD / PLATAFORMA
   =================================== */
.dashboard-section { background: var(--dark2); }

.db-viewer {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 24px;
  align-items: start;
}

/* --- Lista lateral --- */
.db-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 10px;
  overflow: hidden;
}

.db-list-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: none;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s ease;
  width: 100%;
  color: var(--text-muted);
  position: relative;
}

.db-list-item:hover {
  background: rgba(0,114,177,0.07);
  border-color: rgba(0,114,177,0.15);
  color: var(--text);
}

.db-list-item.active {
  background: rgba(0,114,177,0.12);
  border-color: var(--primary);
  color: var(--text);
}

.db-list-item.active .db-list-icon {
  background: var(--primary);
  color: #fff;
}

.db-list-item.active .db-list-arrow {
  color: var(--primary);
  transform: rotate(0deg);
}

.db-list-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--surface2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s, color 0.2s;
  color: var(--text-muted);
}

.db-list-text {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.db-list-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: inherit;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
}

.db-list-sub {
  font-size: 0.75rem;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
}

.db-list-arrow {
  flex-shrink: 0;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  transition: color 0.2s;
}

/* --- Painel de imagem --- */
.db-panel {
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.db-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

.db-panel-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.db-panel-counter {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--surface3);
  padding: 3px 10px;
  border-radius: 20px;
  font-variant-numeric: tabular-nums;
}

.db-panel-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #0a0f1e;
  overflow: hidden;
}

.db-panel-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity 0.35s ease;
}

.db-panel-img.db-fade {
  opacity: 0;
}

/* Prev/Next overlay buttons */
.db-panel-nav {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  pointer-events: none;
}

.db-nav-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.55);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  pointer-events: all;
  transition: background 0.18s;
  backdrop-filter: blur(4px);
}

.db-nav-btn:hover {
  background: rgba(0,114,177,0.85);
}

/* Dots */
.db-panel-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 14px;
  border-top: 1px solid var(--border);
}

.db-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--border);
  cursor: pointer;
  transition: all 0.2s;
  display: inline-block;
}

.db-dot.active {
  background: var(--primary);
  width: 20px;
  border-radius: 4px;
}

/* Responsive */
@media (max-width: 960px) {
  .db-viewer {
    grid-template-columns: 1fr;
  }
  .db-list {
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 4px;
    padding: 8px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .db-list::-webkit-scrollbar { display: none; }
  .db-list-item {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 6px;
    padding: 10px 12px;
    min-width: 110px;
    flex-shrink: 0;
  }
  .db-list-arrow { display: none; }
  .db-list-sub { display: none; }
  .db-panel-img-wrap { aspect-ratio: 4 / 3; }
}

/* ===================================
   SECTION: PODCAST
   =================================== */
.podcast-section { background: var(--dark); }
.podcast-container { max-width: 760px; margin: 0 auto; }

/* ---- Full podcast player (pfp-*) ---- */
.podcast-full-player {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 44px;
  position: relative;
  overflow: hidden;
}
.podcast-full-player::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.pfp-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.pfp-ep-badge {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  flex-shrink: 0;
}
.pfp-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  flex: 1;
  min-width: 0;
}
.pfp-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
  white-space: nowrap;
}
/* Waveform */
.pfp-waveform {
  position: relative;
  height: 56px;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  background: rgba(0,114,177,0.06);
  margin-bottom: 8px;
}
.pfp-waveform-bars {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px 6px;
  height: 100%;
  position: relative;
  z-index: 1;
}
.pfp-waveform-bars span {
  display: block;
  flex: 1;
  min-width: 2px;
  max-width: 4px;
  border-radius: 2px;
  background: rgba(0,114,177,0.40);
  transition: background 0.2s;
}
.pfp-waveform-bars span.pfp-bar-played {
  background: var(--primary);
}
.pfp-waveform-progress {
  position: absolute;
  top: 0; left: 0; height: 100%;
  background: linear-gradient(90deg, rgba(0,114,177,0.18), rgba(176,27,141,0.10));
  width: 0%;
  transition: width 0.25s linear;
  pointer-events: none;
  z-index: 0;
}
/* Time row */
.pfp-time-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  font-variant-numeric: tabular-nums;
}
/* Controls */
.pfp-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.pfp-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.18s, color 0.18s;
  flex-shrink: 0;
}
.pfp-btn:hover { background: var(--border); color: var(--text); }
.pfp-play {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, var(--primary), #005a8e) !important;
  color: #fff !important;
  border-radius: 50% !important;
  margin: 0 6px;
  box-shadow: 0 4px 18px rgba(0,114,177,0.35);
  transition: transform 0.15s, box-shadow 0.15s !important;
}
.pfp-play:hover { transform: scale(1.07); box-shadow: 0 6px 24px rgba(0,114,177,0.5); }
.pfp-skip { color: var(--text-muted); }
.pfp-vol-group {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.pfp-volume {
  -webkit-appearance: none;
  appearance: none;
  width: 80px; height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.pfp-volume::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
}
.pfp-speed {
  font-size: 0.78rem;
  font-weight: 700;
  border: 1px solid var(--border) !important;
  border-radius: 6px !important;
  padding: 4px 10px !important;
  min-width: 38px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}
.pfp-speed:hover { border-color: var(--primary) !important; color: var(--primary); }

/* Waveform bar animation when playing */
.pfp-waveform-bars.pfp-playing span {
  animation: pfp-bar-pulse 1.2s ease-in-out infinite;
}
.pfp-waveform-bars.pfp-playing span:nth-child(2n)   { animation-delay: 0.1s; }
.pfp-waveform-bars.pfp-playing span:nth-child(3n)   { animation-delay: 0.2s; }
.pfp-waveform-bars.pfp-playing span:nth-child(5n)   { animation-delay: 0.35s; }
@keyframes pfp-bar-pulse {
  0%, 100% { opacity: 0.35; }
  50%       { opacity: 1; }
}

@media (max-width: 600px) {
  .podcast-full-player { padding: 28px 20px; }
  .pfp-header { gap: 10px; }
  .pfp-title { font-size: 0.95rem; }
  .pfp-volume { width: 60px; }
  .pfp-play { width: 44px; height: 44px; }
}

/* ===================================
   SECTION: CONTACT / CTA
   =================================== */
.cta-section {
  background: linear-gradient(135deg, var(--dark2), var(--dark3));
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse 80% 80% at 50% 50%, rgba(0,114,177,0.14), transparent);
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.cta-inner h2 { margin-bottom: 16px; color: var(--text); }
.cta-inner p { font-size: 1.1rem; margin-bottom: 40px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-contacts {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.cta-contact-item { text-align: center; }
.cta-contact-label { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-dim); margin-bottom: 4px; }
.cta-contact-value { font-weight: 600; color: var(--text); }

/* ===================================
   FOOTER
   =================================== */
footer {
  background: var(--dark2);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
}
.footer-brand h3 span { color: var(--accent); }
.footer-brand p { font-size: 0.9rem; max-width: 280px; }
.footer-col h4 { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text); margin-bottom: 16px; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 0.9rem; color: var(--text-muted); transition: color var(--transition); }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 12px;
}

/* ===================================
   ANIMATIONS
   =================================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px var(--glow); }
  50% { box-shadow: 0 0 40px var(--glow), 0 0 80px var(--glow2); }
}
@keyframes counter-up {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-up { animation: fadeInUp 0.6s ease both; }
.animate-fade { animation: fadeIn 0.6s ease both; }

[data-aos] { opacity: 0; transform: translateY(20px); transition: all 0.6s ease; }
[data-aos].aos-animate { opacity: 1; transform: translateY(0); }
[data-aos][data-delay="100"] { transition-delay: 0.1s; }
[data-aos][data-delay="200"] { transition-delay: 0.2s; }
[data-aos][data-delay="300"] { transition-delay: 0.3s; }
[data-aos][data-delay="400"] { transition-delay: 0.4s; }
[data-aos][data-delay="500"] { transition-delay: 0.5s; }

/* ===================================
   MATERIAL CARD — featured / dual buttons
   =================================== */
.material-card-featured {
  border-color: var(--primary);
  position: relative;
}
.material-card-featured::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.material-badge-active {
  background: rgba(0,166,81,0.15) !important;
  color: var(--success) !important;
  border-color: rgba(0,166,81,0.3) !important;
}
.material-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-shrink: 0;
}
.material-view-btn {
  background: rgba(0,114,177,0.12) !important;
  color: var(--primary) !important;
  border-color: rgba(0,114,177,0.3) !important;
}
.material-view-btn:hover {
  background: rgba(0,114,177,0.22) !important;
}

/* ===================================
   PDF VIEWER MODAL
   =================================== */
.pdf-viewer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 16px;
}
.pdf-viewer-overlay.active {
  opacity: 1;
  pointer-events: all;
}
.pdf-viewer-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 1100px;
  height: calc(100vh - 48px);
  max-height: 860px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.96);
  transition: transform 0.3s ease;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
}
.pdf-viewer-overlay.active .pdf-viewer-modal {
  transform: scale(1);
}
.pdf-viewer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
  gap: 16px;
  flex-shrink: 0;
}
.pdf-viewer-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  min-width: 0;
}
.pdf-viewer-title span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pdf-viewer-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.pdf-viewer-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.18s;
}
.pdf-viewer-btn:hover { background: #005a8e; }
.pdf-viewer-close {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: none;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.18s, color 0.18s;
}
.pdf-viewer-close:hover { background: var(--border); color: var(--text); }
.pdf-viewer-body {
  flex: 1;
  min-height: 0;
  background: #525659;
}
.pdf-viewer-frame {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Audio player modal */
.audio-player-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 16px;
}
.audio-player-overlay.active {
  opacity: 1;
  pointer-events: all;
}
.audio-player-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 540px;
  overflow: hidden;
  transform: scale(0.96);
  transition: transform 0.3s ease;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
}
.audio-player-overlay.active .audio-player-modal {
  transform: scale(1);
}
.audio-player-body {
  padding: 32px 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.audio-player-cover {
  display: flex;
  align-items: center;
  gap: 24px;
}
.audio-player-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.audio-ep-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}
.audio-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.audio-host {
  font-size: 0.82rem;
  color: var(--text-muted);
}

@media (max-width: 600px) {
  .pdf-viewer-modal { height: calc(100vh - 32px); border-radius: 12px; }
  .pdf-viewer-title span { font-size: 0.78rem; }
  .pdf-viewer-btn span { display: none; }
  .audio-player-body { padding: 24px 20px; }
  .audio-player-cover { flex-direction: column; text-align: center; }
}

/* ===================================
   MODAL
   =================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.modal-overlay.active { opacity: 1; pointer-events: all; }
.modal {
  background: var(--dark2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 600px;
  width: 100%;
  transform: scale(0.95);
  transition: transform var(--transition);
}
.modal-overlay.active .modal { transform: scale(1); }
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; }
.modal-title { font-size: 1.5rem; font-weight: 700; color: var(--text); }
.modal-close {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all var(--transition);
}
.modal-close:hover { background: var(--surface); color: var(--text); }
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  transition: border-color var(--transition);
}
.form-input:focus { outline: none; border-color: var(--primary); }
.form-input::placeholder { color: var(--text-dim); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline-grid::before { display: none; }
  .timeline-item { margin-bottom: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { gap: 48px; }

}

@media (max-width: 768px) {
  .section { padding: 72px 0; }
  .hero { padding: 100px 0 60px; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .about-grid { grid-template-columns: 1fr; }
  .problem-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }

  .timeline-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 60px; left: 0; right: 0;
    background: #ffffff;
    padding: 24px;
    border-bottom: 1px solid rgba(0,0,0,0.10);
    box-shadow: 0 8px 24px rgba(0,0,0,0.10);
  }
  .carta-container { padding: 40px 28px; }
  .hero-visual { display: none; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { text-align: center; justify-content: center; }
  .form-grid { grid-template-columns: 1fr; }
  .modal { padding: 32px 24px; }
}

@media (max-width: 480px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  .hero-stat-value { font-size: 1.8rem; }
  .metric-value { font-size: 2.2rem; }
  .investment-value { font-size: 2.2rem; }
}

/* ===================================
   PODCAST HERO PLAYER — below hero
   =================================== */
.podcast-hero-section {
  background: var(--dark2);
  padding: 0;
  border-bottom: 1px solid var(--border);
}
.podcast-hero-inner {
  padding: 40px 0;
}
.podcast-hero-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.podcast-live-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
  animation: pulse-live 2s ease-in-out infinite;
}
@keyframes pulse-live {
  0%, 100% { box-shadow: 0 0 4px var(--primary); opacity: 1; }
  50% { box-shadow: 0 0 16px var(--glow); opacity: 0.7; }
}
.podcast-hero-player {
  display: flex;
  align-items: center;
  gap: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 36px;
}
.php-cover {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}
.php-cover-art {
  width: 72px; height: 72px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--dark3), var(--surface3));
  border: 1px solid var(--border2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.php-cover-art svg { width: 56px; height: 56px; }
.php-episode {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 4px;
}
.php-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 4px;
  max-width: 240px;
}
.php-guest {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.php-controls-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Waveform */
.php-waveform {
  position: relative;
  height: 48px;
  cursor: pointer;
  overflow: hidden;
  border-radius: 4px;
}
.php-waveform-bars {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 100%;
  padding: 4px 0;
}
.php-waveform-bars span {
  display: block;
  flex: 1;
  background: rgba(0,114,177,0.28);
  border-radius: 2px;
  transition: background 0.2s;
}
.php-waveform-bars.waveform-playing span {
  animation: waveform-anim 0.8s ease-in-out infinite alternate;
}
.php-waveform-bars.waveform-playing span:nth-child(odd)  { animation-delay: 0s; }
.php-waveform-bars.waveform-playing span:nth-child(even) { animation-delay: 0.15s; }
@keyframes waveform-anim {
  from { opacity: 0.3; transform: scaleY(0.6); }
  to   { opacity: 1;   transform: scaleY(1); }
}
.php-waveform-progress {
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: 0%;
  background: linear-gradient(90deg, rgba(0,114,177,0.40), rgba(176,27,141,0.15));
  border-right: 2px solid var(--accent);
  pointer-events: none;
  transition: width 0.3s linear;
}
.php-waveform:hover .php-waveform-bars span { background: rgba(0,114,177,0.45); }

/* Time row */
.php-time-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-dim);
}
.php-time-current { color: var(--text-muted); }

/* Controls row */
.php-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}
.php-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  border-radius: 50%;
  transition: all var(--transition);
  padding: 6px;
}
.php-btn:hover { color: var(--text); background: var(--surface2); }
.php-btn-play {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: 50%;
  box-shadow: 0 4px 16px var(--glow);
}
.php-btn-play:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px var(--glow);
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  color: #fff;
}
.php-btn-playing {
  background: linear-gradient(135deg, var(--accent), var(--primary));
}
.php-btn-skip { padding: 8px; }
.php-btn-speed {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.php-btn-speed:hover { color: var(--accent); border-color: var(--primary); }

/* Volume */
.php-volume-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.php-volume-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 80px;
  height: 4px;
  background: var(--surface2);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.php-volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  transition: transform var(--transition);
}
.php-volume-slider::-webkit-slider-thumb:hover { transform: scale(1.3); }
.php-speed-wrap { margin-left: 4px; }

/* Coming soon banner */
.php-coming-soon {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(0,114,177,0.07);
  border: 1px dashed rgba(0,114,177,0.25);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.php-coming-soon span:first-child { flex-shrink: 0; }

/* Responsive podcast player */
@media (max-width: 768px) {
  .podcast-hero-player {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px 20px;
    gap: 24px;
  }
  .php-cover { width: 100%; }
  .php-title { max-width: 100%; }
  .php-volume-wrap { display: none; }
  .php-controls-wrap { width: 100%; }
}

/* ===================================
   SECTION: MATERIALS FOR DOWNLOAD
   =================================== */
.materials-section { background: var(--dark2); }
.materials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.material-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.material-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px var(--glow);
}
.material-icon-wrap {
  width: 52px; height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  flex-shrink: 0;
}
.material-icon-blue   { background: rgba(0,114,177,0.15);  color: #0072B1; border: 1px solid rgba(0,114,177,0.28); }
.material-icon-cyan   { background: rgba(0,114,177,0.14);  color: #0072B1; border: 1px solid rgba(0,114,177,0.25); }
.material-icon-green  { background: rgba(0,204,136,0.12);  color: #00cc88; border: 1px solid rgba(0,204,136,0.2); }
.material-icon-orange { background: rgba(176,27,141,0.13);  color: #B01B8D; border: 1px solid rgba(176,27,141,0.25); }
.material-icon-purple  { background: rgba(153,51,255,0.12);  color: #aa66ff; border: 1px solid rgba(153,51,255,0.2); }
.material-icon-teal    { background: rgba(0,204,204,0.12);   color: #00cccc; border: 1px solid rgba(0,204,204,0.2); }
.material-icon-magenta { background: rgba(176,27,141,0.12);  color: #B01B8D; border: 1px solid rgba(176,27,141,0.25); }
.material-icon-red     { background: rgba(255,0,0,0.10);     color: #ff2a2a; border: 1px solid rgba(255,0,0,0.22); }
.material-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.material-type {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 6px;
}
.material-content h4 {
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.3;
}
.material-content p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 16px;
}
.material-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.material-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  background: rgba(0,114,177,0.10);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
}
.material-size {
  font-size: 0.75rem;
  color: var(--text-dim);
}
.material-dl-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 11px 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  margin-top: auto;
  text-decoration: none;
  box-sizing: border-box;
}
.material-dl-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--glow);
}
.material-dl-soon {
  background: var(--surface2);
  color: var(--text-dim);
  border: 1px dashed rgba(255,255,255,0.1);
  cursor: not-allowed;
}
.material-dl-soon:hover { transform: none; box-shadow: none; }

@media (max-width: 1024px) {
  .materials-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .materials-grid { grid-template-columns: 1fr; }
}

/* ===================================
   LOGIN PAGE
   =================================== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--dark);
  position: relative;
  overflow: hidden;
}
.login-bg {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse 80% 60% at 30% 50%, rgba(0,114,177,0.14), transparent),
    radial-gradient(ellipse 60% 60% at 70% 50%, rgba(176,27,141,0.06), transparent);
}
.login-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 460px;
  padding: 24px;
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
}
.login-logo {
  text-align: center;
  margin-bottom: 8px;
}
.login-logo h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
}
.login-logo h1 span { color: var(--accent); }
.login-subtitle {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 36px;
}
.login-form .form-group { margin-bottom: 20px; }
.login-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.login-particles {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  overflow: hidden;
  pointer-events: none;
}
.particle {
  position: absolute;
  width: 4px; height: 4px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  animation: float-particle 8s linear infinite;
}
@keyframes float-particle {
  0% { transform: translateY(100vh) translateX(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100px) translateX(100px); opacity: 0; }
}
.login-error {
  background: rgba(255,68,68,0.1);
  border: 1px solid rgba(255,68,68,0.3);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.88rem;
  color: #ff6666;
  margin-bottom: 20px;
  display: none;
}
.login-error.show { display: block; }