/* ========================================
   SIGNAL SOURCES — Design Tokens & Styles
   ======================================== */

:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Font families */
  --font-display: 'General Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* ========================================
   DARK THEME (Default & Only)
   ======================================== */

:root {
  --color-bg:             #0a0a0c;
  --color-surface:        #111114;
  --color-surface-2:      #18181c;
  --color-surface-offset: #1e1e24;
  --color-border:         #2a2a32;
  --color-border-accent:  rgba(45, 212, 191, 0.15);
  --color-divider:        #1e1e24;

  --color-text:           #e4e4e7;
  --color-text-muted:     #8b8b96;
  --color-text-faint:     #52525a;
  --color-text-inverse:   #0a0a0c;

  --color-primary:        #2dd4bf;
  --color-primary-dim:    rgba(45, 212, 191, 0.12);
  --color-primary-hover:  #14b8a6;
  --color-primary-glow:   rgba(45, 212, 191, 0.06);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
}

/* ========================================
   LAYOUT
   ======================================== */

.site-wrapper {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
}

@media (max-width: 640px) {
  .site-wrapper {
    padding-inline: var(--space-4);
  }
}

/* ========================================
   HEADER
   ======================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 12, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
}

@media (max-width: 640px) {
  .header-inner {
    padding-inline: var(--space-4);
  }
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.logo-mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
}

.header-count {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}

/* ========================================
   IMMERSIVE HERO
   ======================================== */

.hero-immersive {
  position: relative;
  overflow: hidden;
  padding-top: clamp(var(--space-10), 6vw, var(--space-16));
  padding-bottom: clamp(var(--space-8), 4vw, var(--space-12));
}

.hero-immersive-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Headline */
.hero-headline {
  text-align: center;
  margin-bottom: clamp(var(--space-6), 4vw, var(--space-10));
  position: relative;
  z-index: 2;
}

.hero-headline h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  letter-spacing: -0.025em;
  line-height: 1.05;
}

.hero-headline h1 .accent {
  color: var(--color-primary);
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-4);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-full);
  background: var(--color-primary-dim);
}

.hero-tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* Globe */
.hero-globe {
  position: relative;
  width: clamp(280px, 50vw, 520px);
  aspect-ratio: 1;
  margin: 0 auto;
  z-index: 1;
}

.hero-globe img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  mask-image: radial-gradient(ellipse 75% 75% at center, black 60%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 75% 75% at center, black 60%, transparent 100%);
}

.globe-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120%;
  height: 120%;
  background: radial-gradient(circle, rgba(45, 212, 191, 0.08) 0%, transparent 65%);
  pointer-events: none;
}

/* Stat cards — full-width with illustrations */
.hero-stats-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  width: 100%;
  max-width: 640px;
  padding-inline: var(--space-4);
  margin-top: clamp(-80px, -10vw, -120px);
  position: relative;
  z-index: 3;
}

.stat-card-full {
  background: rgba(17, 17, 20, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  overflow: hidden;
}

.stat-card-text {
  margin-bottom: var(--space-6);
}

.stat-card-number {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 1.4rem + 1.5vw, 2.75rem);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: var(--space-3);
}

.stat-card-desc {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.stat-card-visual {
  margin-bottom: var(--space-6);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.stat-card-visual img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

.stat-card-visual-sm {
  max-width: 200px;
}

.stat-card-source {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  line-height: 1.5;
}

.stat-card-source a {
  color: var(--color-text-faint);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.stat-card-source a:hover {
  color: var(--color-primary);
}

/* Mobile hero adjustments */
@media (max-width: 640px) {
  .hero-immersive-inner {
    padding-inline: var(--space-4);
  }

  .stat-card-full {
    padding: var(--space-6);
  }
}

/* ========================================
   STATEMENT SECTION
   ======================================== */

.statement {
  padding: 0 0 clamp(var(--space-12), 8vw, var(--space-24));
}

.statement-inner {
  max-width: 760px;
  margin: 0 auto;
}

.statement-block {
  border-left: 2px solid var(--color-primary);
  padding-left: var(--space-6);
  margin-bottom: var(--space-8);
}

.statement-block p {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-4);
  max-width: 72ch;
}

.statement-block p:last-child {
  margin-bottom: 0;
}

.statement-block p strong {
  color: var(--color-text);
  font-weight: 600;
}



/* ========================================
   SECTION DIVIDER
   ======================================== */

.section-divider {
  border: none;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-border) 20%,
    var(--color-primary) 50%,
    var(--color-border) 80%,
    transparent
  );
  margin: 0;
  opacity: 0.5;
}

/* ========================================
   CHANNELS SECTION
   ======================================== */

.channels-section {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.section-header .count {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ========================================
   CHANNEL CARDS
   ======================================== */

.channels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-6);
}

@media (max-width: 480px) {
  .channels-grid {
    grid-template-columns: 1fr;
  }
}

.channel-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

.channel-card:hover {
  border-color: rgba(45, 212, 191, 0.25);
  box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.08), var(--shadow-md);
  transform: translateY(-2px);
}

.card-top {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.card-avatar {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  flex-shrink: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-avatar-placeholder {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.6;
}

.card-meta {
  flex: 1;
  min-width: 0;
}

.card-name {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.card-host {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.card-description {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.card-tag {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text-faint);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: transparent;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-md);
  background: var(--color-primary-dim);
  align-self: flex-start;
}

.card-link:hover {
  background: rgba(45, 212, 191, 0.18);
  border-color: rgba(45, 212, 191, 0.3);
}

.card-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ========================================
   FOOTER
   ======================================== */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0;
  margin-top: var(--space-12);
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

@media (max-width: 640px) {
  .footer-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding-inline: var(--space-4);
  }
}

.footer-note {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.6;
}

.footer-note a {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-note a:hover {
  color: var(--color-primary);
}

/* ========================================
   SCROLL ANIMATIONS
   ======================================== */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered channel cards */
.channel-card {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.channel-card.visible {
  opacity: 1;
  transform: translateY(0);
}