/* ═══════════════════════════════════════════════════════════════════════════
   THE LISTENING CLUB — Design System v3
   Dark Editorial · Studio Aesthetic · Zero Emoji
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Custom Properties ──────────────────────────────────────────────────── */
:root {
  /* Light Palette (default) */
  --bg:          #FAF9F7;
  --bg-elevated: #F4F1EC;
  --bg-surface:  #ECE8E2;
  --text:        #1A1916;
  --text-muted:  #726D66;
  --accent:      #4B5846;
  --accent-dim:  #3A4735;
  --border:      rgba(0,0,0,0.07);
  --border-light:rgba(0,0,0,0.16);

  /* Typography */
  --font-sans:  'Syne', 'Helvetica Neue', Helvetica, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;

  /* Spacing */
  --space-2xs: clamp(0.25rem, 0.5vw, 0.4rem);
  --space-xs:  clamp(0.5rem,  1vw,  0.75rem);
  --space-sm:  clamp(1rem,    2vw,  1.5rem);
  --space-md:  clamp(2rem,    4vw,  3rem);
  --space-lg:  clamp(4rem,    8vw,  7rem);
  --space-xl:  clamp(7rem,   14vw, 12rem);

  /* Type scale — minimums raised for readability */
  --text-xs:   clamp(0.8rem,   0.9vw,  0.875rem);
  --text-sm:   clamp(0.9rem,   1.1vw,  1rem);
  --text-base: clamp(1rem,     1.3vw,  1.125rem);
  --text-lg:   clamp(1.2rem,   1.7vw,  1.5rem);
  --text-xl:   clamp(1.7rem,   2.6vw,  2.4rem);
  --text-2xl:  clamp(2.6rem,   4.8vw,  4.2rem);
  --text-3xl:  clamp(3.5rem,   7vw,    6.5rem);
  --text-display: clamp(4.5rem, 9vw, 9rem);

  /* Motion */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-expo:  cubic-bezier(0.7, 0, 0.84, 0);
  --ease-circ:     cubic-bezier(0.85, 0, 0.15, 1);
  --ease-smooth:   cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* ── Dark Mode ───────────────────────────────────────────────────────────── */
body.dark-mode {
  --bg:          #0A0A0A;
  --bg-elevated: #111111;
  --bg-surface:  #161616;
  --text:        #FFFFFF;
  --text-muted:  #C8C5C0;
  --border:      rgba(255,255,255,0.08);
  --border-light:rgba(255,255,255,0.15);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* prevent bounce scrolling glitches */
  overscroll-behavior: none;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
  overscroll-behavior: none;
  /* smooth GPU compositing */
  -webkit-overflow-scrolling: touch;
}

a { color: inherit; text-decoration: none; }
img, video, canvas { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: transparent; font-family: var(--font-sans); color: inherit; }
ul { list-style: none; }
input, select, textarea { font-family: var(--font-sans); }

::selection { background: var(--accent); color: var(--bg); }

/* ── Film Grain Overlay ─────────────────────────────────────────────────── */
.grain-overlay {
  position: fixed; inset: 0; z-index: 9998; pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23grain)'/%3E%3C/svg%3E");
  background-size: 256px 256px;
  /* slowed down — was 0.15s causing constant repaints */
  animation: grain-shift 0.4s steps(1) infinite;
  will-change: transform;
}

@keyframes grain-shift {
  0%   { transform: translate(0, 0); }
  25%  { transform: translate(-2%, -3%); }
  50%  { transform: translate(3%, 1%); }
  75%  { transform: translate(-1%, 4%); }
  100% { transform: translate(2%, -2%); }
}

/* ── Navigation ─────────────────────────────────────────────────────────── */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  pointer-events: none;
  transition: background 0.4s ease, backdrop-filter 0.4s ease, padding 0.4s ease;
}

.site-nav.nav--scrolled {
  background: rgba(250,249,247,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding-top: var(--space-xs);
  padding-bottom: var(--space-xs);
}
body.dark-mode .site-nav.nav--scrolled {
  background: rgba(10,10,10,0.88);
}

.site-nav > * { pointer-events: all; }

.nav-actions {
  display: flex; align-items: center; gap: var(--space-xs);
  pointer-events: all;
}

.nav-wordmark {
  font-family: var(--font-sans); font-size: var(--text-xs);
  font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; color: var(--text);
}

.nav-links { display: flex; gap: var(--space-md); }

.nav-link {
  font-size: var(--text-xs); letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text); opacity: 0.6; transition: opacity 0.3s ease;
  font-weight: 500;
}
.nav-link:hover { opacity: 1; }
.nav-link.active { opacity: 1; border-bottom: 1px solid var(--border-light); }

/* ── Hamburger ──────────────────────────────────────────────────────────── */
.nav-hamburger {
  display: none;
  flex-direction: column; justify-content: center; gap: 5px;
  width: 36px; height: 36px; padding: 0.3rem;
  background: none; border: none; cursor: pointer;
}
.nav-hamburger span {
  display: block; width: 20px; height: 1.5px;
  background: var(--text);
  transition: transform 0.35s var(--ease-out-expo), opacity 0.25s ease;
  transform-origin: center;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ── Mobile Navigation Overlay ──────────────────────────────────────────── */
.mobile-nav {
  position: fixed; inset: 0; z-index: 9000;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.4s var(--ease-out-expo);
}
.mobile-nav.open { opacity: 1; pointer-events: all; }

.mobile-nav-close {
  position: absolute; top: var(--space-sm); right: var(--space-md);
  font-size: 1.5rem; color: var(--text-muted); cursor: pointer;
  transition: color 0.2s; background: none; border: none;
}
.mobile-nav-close:hover { color: var(--text); }

.mobile-nav-inner {
  display: flex; flex-direction: column; align-items: center;
  gap: var(--space-lg); text-align: center;
}

.mobile-nav-links {
  display: flex; flex-direction: column; gap: var(--space-md);
}

.mobile-nav-link {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 9vw, 4rem);
  font-weight: 400; color: var(--text);
  letter-spacing: -0.01em; line-height: 1;
  transition: color 0.25s ease, opacity 0.25s ease;
  opacity: 0.85;
}
.mobile-nav-link:hover { color: var(--text); opacity: 1; }

/* ── Intro Splash ───────────────────────────────────────────────────────── */
#intro-splash {
  position: fixed; inset: 0; z-index: 99999;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  pointer-events: all;
}

#intro-splash.hidden {
  pointer-events: none;
  visibility: hidden;
}

.intro-word-wrap {
  display: flex; align-items: baseline; justify-content: center;
  overflow: hidden;
  gap: 0;
}

.intro-letter {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 800;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text);
  line-height: 1;
  white-space: nowrap;
  /* removed letter-spacing and font-size from will-change — causes layer thrashing */
  will-change: opacity, transform;
}

.intro-expanded {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: clamp(0.75rem, 1.2vw, 0.9rem);
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text);
  opacity: 0;
  overflow: hidden;
  max-width: 0;
  white-space: nowrap;
  vertical-align: baseline;
  will-change: opacity, max-width;
}

/* ── Section Label ──────────────────────────────────────────────────────── */
.section-label {
  display: inline-block;
  font-size: var(--text-xs); letter-spacing: 0.25em; text-transform: uppercase;
  color: var(--accent); font-weight: 600; margin-bottom: var(--space-md);
}

/* ── Split-Text Utility ─────────────────────────────────────────────────── */
.split-text .char {
  display: inline-block;
  transform: translateY(100%); opacity: 0;
}

.split-text .word {
  display: inline-block; overflow: hidden;
  margin-right: 0.25em;
}

.split-text.revealed .char {
  transform: translateY(0); opacity: 1;
}

/* ── Reveal Utilities ───────────────────────────────────────────────────── */
.reveal-up {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.9s var(--ease-out-expo), transform 0.9s var(--ease-out-expo);
}
.reveal-up.in-view { opacity: 1; transform: translateY(0); }

.reveal-fade {
  opacity: 0;
  transition: opacity 1.2s var(--ease-smooth);
}
.reveal-fade.in-view { opacity: 1; }

/* ── Decorative Line ────────────────────────────────────────────────────── */
.line-draw {
  width: 100%; height: 1px; background: var(--border-light);
  transform: scaleX(0); transform-origin: left;
  transition: transform 1.2s var(--ease-out-expo);
}
.line-draw.in-view { transform: scaleX(1); }

.line-vertical {
  width: 1px; background: var(--border-light);
  transform: scaleY(0); transform-origin: top;
  transition: transform 1.2s var(--ease-out-expo);
}
.line-vertical.in-view { transform: scaleY(1); }

/* ── Disclaimer Notice ──────────────────────────────────────────────────── */
.disclaimer-notice {
  display: flex; align-items: flex-start; gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.disclaimer-notice p {
  flex: 1;
  font-size: var(--text-sm); color: var(--text-muted);
  letter-spacing: 0.02em; line-height: 1.7;
}

.disclaimer-notice strong {
  color: var(--text); font-weight: 600;
}

.disclaimer-dismiss {
  flex-shrink: 0;
  font-size: 1rem; color: var(--text-muted);
  opacity: 0.5; transition: opacity 0.2s;
  padding: 0.1em 0.3em;
}

.disclaimer-dismiss:hover { opacity: 1; }
.disclaimer-notice.hidden { display: none; }

/* ── Responsive ─────────────────────────────────────────────────────────── */

/* Large tablet */
@media (max-width: 1024px) {
  .nav-links { gap: var(--space-sm); }
}

/* Tablet / mobile — 768px and below */
@media (max-width: 768px) {
  /* Disable expensive grain animation on mobile */
  .grain-overlay { animation: none; }

  /* Nav */
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-auth-btn { display: none; }
  .site-nav { padding: var(--space-xs) var(--space-sm); }

  /* Intro splash — smaller letters on mobile */
  .intro-letter { font-size: clamp(2.8rem, 14vw, 5rem); }
  .intro-expanded { font-size: clamp(0.6rem, 2.5vw, 0.8rem); }

  /* Hero — collapse to single viewport on mobile */
  .section-hero { height: 100vh; }
  .hero-viewport {
    flex-direction: column;
    justify-content: center;
    padding: 0 var(--space-sm);
    gap: var(--space-sm);
  }
  .hero-phase-2 { display: none; }
  .hero-phase-1 { opacity: 1 !important; transform: none !important; position: relative; width: 100%; }
  .hero-headline-main { font-size: clamp(2.4rem, 11vw, 4.5rem); line-height: 1; }
  .hero-ctas { flex-direction: column; gap: var(--space-xs); align-items: center; }
  .hero-scroll-hint { display: none; }
  .hero-tagline { font-size: var(--text-base); }

  /* Show CTA on mobile since scroll phases are hidden */
  .hero-phase-3 {
    display: block !important;
    opacity: 1 !important;
    transform: none !important;
    position: relative;
    width: 100%;
    padding-top: var(--space-sm);
  }

  /* About */
  .about-layout { grid-template-columns: 1fr !important; gap: var(--space-md); }
  .about-right { padding-top: 0; }
  .about-image { max-height: 280px; }
  .about-stats { gap: var(--space-md); }

  /* Process */
  .process-track { flex-direction: column; gap: var(--space-md); overflow: hidden; }
  .process-step { min-width: unset; width: 100%; padding: var(--space-sm) 0; }
  .process-image { display: none; }
  .process-header-grid { flex-direction: column; }

  /* Why */
  .why-strip { flex-direction: column; gap: 0; }
  .why-item { border-bottom: 1px solid var(--border); }
  .why-divider { display: none; }

  /* Meetups */
  .meetups-layout { grid-template-columns: 1fr !important; }
  .meetups-right { padding-top: 0; }
  .meetups-image { max-height: 220px; }

  /* Disclaimer */
  .disclaimer-notice { flex-direction: column; gap: var(--space-xs); }

  /* Footer */
  .footer-inner { flex-direction: column; gap: var(--space-sm); }
  .footer-links-row { flex-direction: column; gap: var(--space-xs); }
  .footer-left { flex-direction: column; gap: var(--space-xs); align-items: flex-start; }

  /* Modals */
  .modal-overlay, .popup-overlay { padding: var(--space-sm); align-items: flex-end; }
  .modal-box, .popup-box { width: 100%; max-width: 100%; padding: var(--space-md); border-radius: 0; }
  .auth-container { padding: var(--space-md); }

  /* Dashboard */
  .dash-grid { grid-template-columns: 1fr; }
  .dash-card-hero, #book-session-card, #whatsapp-card, #kyc-card, #meetups-dash-card {
    grid-column: span 1;
  }
  .dash-header { flex-direction: column; gap: var(--space-sm); align-items: flex-start; padding-top: var(--space-md); }
  .mood-tag-row { flex-wrap: wrap; }
  .time-row { flex-wrap: wrap; }

  /* Chat */
  .alcove-container { height: 90vh; }

  /* Meetup items */
  .meetup-item { flex-direction: column; align-items: flex-start; gap: var(--space-xs); }
}

/* Small phones */
@media (max-width: 400px) {
  :root {
    --text-base: 1rem;
    --text-sm:   0.9rem;
  }
  .hero-headline-main { font-size: clamp(2rem, 13vw, 3.5rem); }
  .btn-lg { padding: 1em 2em; }
}