/* ════════════════════════════════════════════════
   TIANGO — "LONA Y ACERO" DESIGN SYSTEM
   Landing Page Styles — Dual Theme (Dark + Light)
   ════════════════════════════════════════════════ */

/* ──────────────────────────────────────────────
   1. CSS Custom Properties (Design Tokens)
   Semantic tokens: dark theme by default
   ────────────────────────────────────────────── */
@layer base {
  :root {
    /* ─── Brand (invariant) ─── */
    --color-primary:           #E84884;
    --color-primary-light:     #FCD7E6;
    --color-primary-dark:      #C2336A;
    --color-secondary:         #1E1E2F;
    --color-accent:            #FFD166;
    --color-success:           #06D6A0;

    /* ─── Semantic surface tokens — DARK (default) ─── */
    --bg:         #0F0F1A;
    --bg-card:    #1A1A2E;
    --bg-subtle:  #151525;
    --border:     #2A2A44;
    --text:       #F8F9FA;
    --text-2:     #A0AAB2;

    /* ─── Canvas node colors ─── */
    --canvas-steel:       #2A2A44;
    --canvas-steel-light: #3A3A5C;
    --canvas-tarp-1: rgba(232,72,132,0.025);
    --canvas-tarp-2: rgba(255,209,102,0.02);
    --canvas-tarp-3: rgba(30,30,47,0.04);

    /* ─── Map grid ─── */
    --map-grid-color: rgba(42,42,68,0.6);

    /* ─── Nav blur color ─── */
    --nav-blur-bg: rgba(15, 15, 26, 0.85);
    --nav-mobile-bg: rgba(15, 15, 26, 0.97);

    /* ─── Feature card dark variant ─── */
    --card-dark-gradient: linear-gradient(135deg, #1A1A2E, #1E1E2F);

    /* ─── Discover card img ─── */
    --discover-img-gradient: linear-gradient(135deg, #2A1A30, #1A2A2A);

    /* ─── Floating hero card ─── */
    --fcard-bg: rgba(26, 26, 46, 0.92);
    --fcard-border: rgba(255,255,255,0.1);
    --fcard-shadow: rgba(0,0,0,0.4);

    /* ─── Phone shadow ─── */
    --phone-shadow: 0 0 0 1.5px rgba(255,255,255,0.08),
                    0 32px 80px rgba(0,0,0,0.6),
                    0 8px 24px rgba(232,72,132,0.2);

    /* ─── Shadows ─── */
    --shadow-card:    0 4px 24px rgba(0, 0, 0, 0.12);
    --shadow-premium: 0 8px 32px rgba(232, 72, 132, 0.2);

    /* ─── Spacing ─── */
    --sp-xs:  4px;
    --sp-sm:  8px;
    --sp-md:  16px;
    --sp-lg:  24px;
    --sp-xl:  32px;
    --sp-2xl: 48px;
    --sp-3xl: 80px;
    --sp-4xl: 120px;

    /* ─── Typography ─── */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --fw-regular:  400;
    --fw-medium:   500;
    --fw-semibold: 600;
    --fw-bold:     700;
    --fw-black:    900;

    /* ─── Radii ─── */
    --radius-sm:   8px;
    --radius-md:   16px;
    --radius-full: 9999px;

    /* ─── Transitions ─── */
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
    --duration-fast:   150ms;
    --duration-normal: 300ms;
    --duration-slow:   600ms;

    /* ─── Nav ─── */
    --nav-height: 72px;
  }

  /* Light theme tokens. The anti-FOSC script always sets data-theme. */
  :root[data-theme="light"] {
    --bg:         #F9F9FB;
    --bg-card:    #FFFFFF;
    --bg-subtle:  #F2F2F6;
    --border:     #E9ECEF;
    --text:       #1E1E2F;
    --text-2:     #6C757D;

    --canvas-steel:       #D0D4DB;
    --canvas-steel-light: #B8BEC8;
    --canvas-tarp-1: rgba(232,72,132,0.04);
    --canvas-tarp-2: rgba(255,209,102,0.05);
    --canvas-tarp-3: rgba(30,30,47,0.02);

    --map-grid-color: rgba(180,185,200,0.5);

    --nav-blur-bg:    rgba(249, 249, 251, 0.88);
    --nav-mobile-bg:  rgba(249, 249, 251, 0.98);

    --card-dark-gradient: linear-gradient(135deg, #EFF0F3, #E8E9ED);
    --discover-img-gradient: linear-gradient(135deg, #F5E6F0, #E6F5F0);

    --fcard-bg:     rgba(255, 255, 255, 0.95);
    --fcard-border: rgba(30,30,47,0.08);
    --fcard-shadow: rgba(0,0,0,0.12);

    --phone-shadow: 0 0 0 1.5px rgba(30,30,47,0.08),
                    0 32px 80px rgba(0,0,0,0.18),
                    0 8px 24px rgba(232,72,132,0.15);

    --shadow-card:    0 4px 24px rgba(0, 0, 0, 0.07);
    --shadow-premium: 0 8px 32px rgba(232, 72, 132, 0.18);
  }
}

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

  html {
    font-family: var(--font-family);
    background-color: var(--bg);
    color: var(--text);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
    scrollbar-color: var(--border) var(--bg);
    scrollbar-width: thin;
    interpolate-size: allow-keywords;
    transition: background-color var(--duration-slow) var(--ease-out),
                color var(--duration-slow) var(--ease-out);
  }

  html,
  body {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
  }

  img, svg { display: block; }

  a {
    color: inherit;
    text-decoration: none;
  }

  ul, ol { list-style: none; }

  button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
  }

  /* Accessibility */
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
  }

  :focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
  }

  /* Reduced motion */
  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
  }
}

/* ──────────────────────────────────────────────
   3. Layout Utilities
   ────────────────────────────────────────────── */
@layer utilities {
  .container {
    width: 100%;
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: var(--sp-lg);
  }

  @media (min-width: 768px) {
    .container { padding-inline: var(--sp-xl); }
  }

  @media (min-width: 1200px) {
    .container { padding-inline: var(--sp-2xl); }
  }
}

/* ──────────────────────────────────────────────
   4. Registered Custom Properties for Animation
   ────────────────────────────────────────────── */
@property --gradient-angle {
  syntax: '<angle>';
  inherits: false;
  initial-value: 0deg;
}

@property --glow-opacity {
  syntax: '<number>';
  inherits: false;
  initial-value: 0.2;
}

/* ──────────────────────────────────────────────
   5. Button System
   ────────────────────────────────────────────── */
@layer components {
  .btn {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-sm);
    font-family: var(--font-family);
    font-weight: var(--fw-semibold);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition:
      transform var(--duration-fast) var(--ease-spring),
      box-shadow var(--duration-normal) var(--ease-out),
      background-color var(--duration-fast) var(--ease-out),
      color var(--duration-fast) var(--ease-out);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    isolation: isolate;
    white-space: nowrap;
  }

  .btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.1);
    transform: translateY(100%);
    transition: transform var(--duration-normal) var(--ease-out);
  }

  .btn:hover::before { transform: translateY(0); }

  .btn--sm  { padding: var(--sp-sm) var(--sp-md); font-size: 0.875rem; }
  .btn--lg  { padding: var(--sp-md) var(--sp-xl); font-size: 1rem; }
  .btn--full { width: 100%; justify-content: center; }

  .btn--primary {
    background-color: var(--color-primary);
    color: #0F0F1A;
    box-shadow: 0 4px 16px rgba(232, 72, 132, 0.3);
  }

  .btn:disabled,
  .btn[aria-disabled="true"] {
    cursor: not-allowed;
    opacity: 0.6;
    box-shadow: none;
    transform: none;
  }

  .btn:disabled::before,
  .btn[aria-disabled="true"]::before { display: none; }

  .btn--primary:not(:disabled):not([aria-disabled="true"]):hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-premium);
  }

  .btn--primary:not(:disabled):not([aria-disabled="true"]):active {
    transform: translateY(0);
  }

  .btn--ghost {
    background-color: transparent;
    color: var(--text);
    border: 1.5px solid var(--border);
  }

  .btn--ghost:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
  }
}

/* ──────────────────────────────────────────────
   6. Navigation
   ────────────────────────────────────────────── */
@layer components {
  .nav {
    position: fixed;
    inset-block-start: 0;
    inset-inline: 0;
    height: var(--nav-height);
    z-index: 100;
    transition: background-color var(--duration-normal) var(--ease-out),
                backdrop-filter var(--duration-normal) var(--ease-out),
                border-color var(--duration-normal) var(--ease-out);
    border-bottom: 1px solid transparent;
  }

  .nav.is-scrolled {
    background-color: var(--nav-blur-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-color: var(--border);
  }

  .nav__inner {
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: var(--sp-lg);
    height: 100%;
    display: flex;
    align-items: center;
    gap: var(--sp-xl);
  }

  @media (min-width: 768px) {
    .nav__inner { padding-inline: var(--sp-xl); }
  }

  .nav__logo {
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    font-weight: var(--fw-black);
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    flex-shrink: 0;
  }

  .nav__logo-img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    flex-shrink: 0;
    filter: drop-shadow(0 2px 6px rgba(232,72,132,0.25));
  }

  .nav__links {
    display: none;
    align-items: center;
    gap: var(--sp-xl);
    margin-inline-start: auto;
  }

  @media (min-width: 768px) {
    .nav__links { display: flex; }
  }

  .nav__link {
    font-size: 0.9375rem;
    font-weight: var(--fw-medium);
    color: var(--text-2);
    transition: color var(--duration-fast) var(--ease-out);
  }

  .nav__link:hover { color: var(--text); }

  .nav__actions {
    display: none;
    margin-inline-start: auto;
    align-items: center;
    gap: var(--sp-sm);
  }

  @media (min-width: 768px) {
    .nav__actions {
      display: flex;
      margin-inline-start: 0;
    }
  }

  /* ─── Theme Toggle Button ─── */
  .theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1.5px solid var(--border);
    background: var(--bg-card);
    color: var(--text-2);
    display: grid;
    place-items: center;
    cursor: pointer;
    transition:
      border-color var(--duration-fast) var(--ease-out),
      color var(--duration-fast) var(--ease-out),
      transform var(--duration-fast) var(--ease-spring);
    flex-shrink: 0;
  }

  .theme-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: rotate(15deg) scale(1.05);
  }

  /* Show/hide moon or sun icon based on theme */
  .theme-toggle .icon-moon { display: block; }
  .theme-toggle .icon-sun  { display: none; }

  :root[data-theme="light"] .theme-toggle .icon-moon { display: none; }
  :root[data-theme="light"] .theme-toggle .icon-sun  { display: block; }

  /* Burger */
  .nav__burger {
    display: flex;
    flex-direction: column;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: var(--sp-sm);
    margin-inline-start: auto;
  }

  @media (min-width: 768px) {
    .nav__burger { display: none; }
  }

  .nav__burger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform var(--duration-normal) var(--ease-out),
                opacity var(--duration-normal) var(--ease-out);
  }

  .nav__burger[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav__burger[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }
  .nav__burger[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Mobile menu */
  .nav__mobile {
    position: absolute;
    top: var(--nav-height);
    inset-inline: 0;
    background: var(--nav-mobile-bg);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    padding: var(--sp-lg);
  }

  .nav__mobile ul {
    display: flex;
    flex-direction: column;
    gap: var(--sp-md);
  }

  .nav__mobile[hidden] { display: none; }

  @starting-style {
    .nav__mobile:not([hidden]) {
      opacity: 0;
      translate: 0 -12px;
    }
  }

  .nav__mobile:not([hidden]) {
    opacity: 1;
    translate: 0 0;
    transition: opacity var(--duration-normal) var(--ease-out),
                translate var(--duration-normal) var(--ease-out);
  }

  .nav__backdrop {
    position: fixed;
    inset: var(--nav-height) 0 0;
    background: rgba(15, 15, 26, 0.42);
    backdrop-filter: blur(2px);
  }

  .nav__backdrop[hidden] { display: none; }

  body.menu-open { overflow: hidden; }
}

/* ──────────────────────────────────────────────
   7. Reveal Animations (Intersection Observer)
   ────────────────────────────────────────────── */
@layer utilities {
  .js [data-reveal] {
    opacity: 0;
    translate: 0 32px;
    transition:
      opacity var(--duration-slow) var(--ease-out),
      translate var(--duration-slow) var(--ease-out);
  }

  .js [data-reveal].is-visible {
    opacity: 1;
    translate: 0 0;
  }

  [data-reveal-delay="100"] { transition-delay: 100ms; }
  [data-reveal-delay="150"] { transition-delay: 150ms; }
  [data-reveal-delay="200"] { transition-delay: 200ms; }
  [data-reveal-delay="250"] { transition-delay: 250ms; }
  [data-reveal-delay="300"] { transition-delay: 300ms; }
  [data-reveal-delay="400"] { transition-delay: 400ms; }
}

/* ──────────────────────────────────────────────
   8. Hero Section
   ────────────────────────────────────────────── */
@layer components {
  .hero {
    position: relative;
    min-height: 100svh;
    display: grid;
    grid-template-columns: 1fr;
    align-items: center;
    padding-block-start: var(--nav-height);
    overflow: hidden;
    isolation: isolate;
  }

  @media (min-width: 1024px) {
    .hero {
      grid-template-columns: 1fr 1fr;
      gap: var(--sp-2xl);
    }
  }

  .hero__canvas {
    position: absolute;
    inset: 0;
    z-index: -2;
  }

  #tube-canvas {
    width: 100%;
    height: 100%;
    opacity: 0.6;
  }

  :root[data-theme="light"] #tube-canvas { opacity: 0.45; }

  .hero__noise {
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
    background-size: 256px 256px;
    opacity: 0.4;
  }

  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(232,72,132,0.08) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
  }

  :root[data-theme="light"] .hero::before {
    background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(232,72,132,0.05) 0%, transparent 70%);
  }

  .hero__content {
    padding-block: var(--sp-3xl);
    padding-inline: var(--sp-lg);
    max-width: 640px;
    margin-inline: auto;
  }

  @media (min-width: 768px) {
    .hero__content { padding-inline: var(--sp-xl); }
  }

  @media (min-width: 1024px) {
    .hero__content {
      padding-inline: var(--sp-2xl) var(--sp-lg);
      margin-inline: 0;
      max-width: none;
    }
  }

  .hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-sm);
    background: rgba(232, 72, 132, 0.1);
    border: 1px solid rgba(232, 72, 132, 0.25);
    border-radius: var(--radius-full);
    padding: 6px var(--sp-md);
    font-size: 0.8125rem;
    font-weight: var(--fw-medium);
    color: var(--color-primary);
    letter-spacing: 0.02em;
    margin-block-end: var(--sp-lg);
  }

  :root[data-theme="light"] .hero__badge {
    background: rgba(232, 72, 132, 0.08);
    border-color: rgba(232, 72, 132, 0.2);
  }

  .badge__dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
  }

  @keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.85); }
  }

  .hero__heading {
    font-size: clamp(2.75rem, 7vw, 5.5rem);
    font-weight: var(--fw-black);
    line-height: 1.05;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-block-end: var(--sp-lg);
    text-wrap: balance;
  }

  .hero__heading-accent {
    font-style: normal;
    color: var(--color-primary);
    display: inline-block;
    position: relative;
  }

  .hero__subhead {
    font-size: clamp(1rem, 2vw, 1.125rem);
    line-height: 1.65;
    color: var(--text-2);
    max-width: 52ch;
    margin-block-end: var(--sp-xl);
    text-wrap: pretty;
  }

  .hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-md);
    margin-block-end: var(--sp-3xl);
  }

  .hero__stats {
    display: flex;
    align-items: center;
    gap: var(--sp-lg);
    flex-wrap: wrap;
  }

  .stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .stat__number {
    font-size: 1.75rem;
    font-weight: var(--fw-black);
    letter-spacing: -0.03em;
    color: var(--text);
    font-variant-numeric: tabular-nums;
  }

  .stat__label {
    font-size: 0.8125rem;
    color: var(--text-2);
    font-weight: var(--fw-medium);
  }

  .stat__divider {
    width: 1px;
    height: 40px;
    background: var(--border);
    flex-shrink: 0;
  }

  .hero__pins {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
  }

  .pin {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .pin--1 { top: 20%; right: 15%; }
  .pin--2 { top: 40%; right: 8%; }
  .pin--3 { top: 60%; right: 22%; }
  .pin--4 { bottom: 25%; right: 10%; }
  .pin--5 { top: 15%; right: 35%; }

  @media (max-width: 1023px) {
    .pin--1 { top: 15%; right: 8%; }
    .pin--2 { display: none; }
    .pin--3 { top: 70%; right: 5%; }
    .pin--4 { display: none; }
    .pin--5 { top: 10%; right: 40%; }
  }

  .pin__dot {
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 0 12px rgba(232,72,132,0.6);
    position: relative;
    z-index: 1;
  }

  .pin__ring {
    position: absolute;
    width: 12px;
    height: 12px;
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    animation: ping 3s ease-out infinite;
  }

  .pin--1 .pin__ring { animation-delay: 0s; }
  .pin--2 .pin__ring { animation-delay: 0.6s; }
  .pin--3 .pin__ring { animation-delay: 1.2s; }
  .pin--4 .pin__ring { animation-delay: 1.8s; }
  .pin--5 .pin__ring { animation-delay: 0.4s; }

  @keyframes ping {
    0%   { transform: scale(1); opacity: 0.8; }
    70%  { transform: scale(3.5); opacity: 0; }
    100% { transform: scale(3.5); opacity: 0; }
  }

  .hero__visual {
    display: none;
    position: relative;
    align-items: center;
    justify-content: center;
    padding-block: var(--sp-3xl);
    padding-inline-end: var(--sp-2xl);
  }

  @media (min-width: 1024px) {
    .hero__visual { display: flex; }
  }

  .hero__phone-wrapper {
    position: relative;
    width: 300px;
    height: 600px;
    flex-shrink: 0;
  }

  .hero__phone-glow {
    position: absolute;
    inset: -40px;
    background: radial-gradient(ellipse at center, rgba(232,72,132,0.3) 0%, transparent 65%);
    animation: breathe 4s ease-in-out infinite;
    z-index: -1;
  }

  :root[data-theme="light"] .hero__phone-glow {
    background: radial-gradient(ellipse at center, rgba(232,72,132,0.18) 0%, transparent 65%);
  }

  @keyframes breathe {
    0%, 100% { opacity: 0.7; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
  }

  .hero__phone {
    width: 300px;
    height: 600px;
    object-fit: cover;
    border-radius: 36px;
    box-shadow: var(--phone-shadow);
    animation: float 6s ease-in-out infinite;
  }

  @keyframes float {
    0%, 100% { transform: translateY(0px) rotate(-1.5deg); }
    50% { transform: translateY(-16px) rotate(1deg); }
  }

  .hero__card-float {
    position: absolute;
    bottom: 60px;
    left: -80px;
    animation: float-card 6s ease-in-out infinite;
    animation-delay: 1s;
  }

  @keyframes float-card {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
  }

  .fcard {
    background: var(--fcard-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--fcard-border);
    border-radius: var(--radius-md);
    padding: var(--sp-md);
    display: flex;
    gap: var(--sp-md);
    min-width: 220px;
    box-shadow: 0 16px 40px var(--fcard-shadow);
  }

  .fcard__indicator {
    width: 4px;
    background: var(--color-primary);
    border-radius: 2px;
    flex-shrink: 0;
  }

  .fcard__name {
    font-weight: var(--fw-semibold);
    font-size: 0.9375rem;
    color: var(--text);
    margin-block-end: 4px;
  }

  .fcard__meta {
    display: flex;
    align-items: center;
    gap: var(--sp-xs);
    margin-block-end: 6px;
  }

  .fcard__badge {
    font-size: 0.6875rem;
    font-weight: var(--fw-bold);
    letter-spacing: 0.08em;
    color: var(--color-success);
    background: rgba(6,214,160,0.1);
    border-radius: var(--radius-full);
    padding: 2px 8px;
  }

  :root[data-theme="light"] .fcard__badge {
    background: rgba(6,214,160,0.12);
  }

  .fcard__distance {
    font-size: 0.8125rem;
    color: var(--text-2);
  }

  .fcard__stars {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8125rem;
    color: var(--color-accent);
    font-weight: var(--fw-semibold);
  }

  .hero__scroll {
    position: absolute;
    bottom: var(--sp-lg);
    left: 50%;
    translate: -50% 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--sp-sm);
    color: var(--text-2);
    font-size: 0.75rem;
    font-weight: var(--fw-medium);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    animation: fade-scroll 3s ease-in-out infinite;
  }

  @keyframes fade-scroll {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
  }

  .scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, transparent, var(--border));
    animation: scroll-line 2s ease-in-out infinite;
  }

  @keyframes scroll-line {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
  }
}

/* ──────────────────────────────────────────────
   9. Marquee Strip
   ────────────────────────────────────────────── */
@layer components {
  .marquee-strip {
    overflow: hidden;
    border-block: 1px solid var(--border);
    background: var(--bg-card);
    padding-block: var(--sp-md);
  }

  .marquee__track {
    display: flex;
    width: max-content;
    animation: marquee 30s linear infinite;
  }

  @keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
  }

  .marquee__content {
    display: flex;
    align-items: center;
    gap: var(--sp-xl);
    padding-inline: var(--sp-xl);
    flex-shrink: 0;
  }

  .marquee__content span {
    font-size: 0.8125rem;
    font-weight: var(--fw-bold);
    letter-spacing: 0.12em;
    color: var(--text-2);
    text-transform: uppercase;
    white-space: nowrap;
  }

  .marquee__dot {
    color: var(--color-primary) !important;
    font-size: 0.5rem !important;
    letter-spacing: 0 !important;
  }
}

/* ──────────────────────────────────────────────
   10. Section Headers
   ────────────────────────────────────────────── */
@layer components {
  .section-header {
    margin-block-end: var(--sp-3xl);
  }

  .section-header--center {
    text-align: center;
  }

  .section-label {
    font-size: 0.75rem;
    font-weight: var(--fw-bold);
    letter-spacing: 0.15em;
    color: var(--color-primary);
    text-transform: uppercase;
    margin-block-end: var(--sp-md);
  }

  .section-heading {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--fw-black);
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--text);
    text-wrap: balance;
  }

  .section-heading em {
    font-style: normal;
    color: var(--color-primary);
  }
}

/* ──────────────────────────────────────────────
   11. Features Section
   ────────────────────────────────────────────── */
@layer components {
  .features {
    padding-block: var(--sp-4xl);
  }

  .features__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--sp-md);
  }

  @media (min-width: 640px) {
    .features__grid { grid-template-columns: repeat(2, 1fr); }
  }

  @media (min-width: 1024px) {
    .features__grid { grid-template-columns: repeat(3, 1fr); }
  }

  .feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--sp-xl);
    transition:
      border-color var(--duration-normal) var(--ease-out),
      transform var(--duration-normal) var(--ease-spring),
      box-shadow var(--duration-normal) var(--ease-out);
    position: relative;
    overflow: hidden;
    isolation: isolate;
  }

  .feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 100% 0%, rgba(232,72,132,0.06) 0%, transparent 60%);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-out);
  }

  .feature-card:hover {
    border-color: rgba(232,72,132,0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
  }

  .feature-card:hover::before { opacity: 1; }

  .feature-card--wide {
    display: flex;
    flex-direction: column;
    gap: var(--sp-lg);
  }

  @media (min-width: 640px) {
    .feature-card--wide { grid-column: span 2; }
  }

  @media (min-width: 1024px) {
    .feature-card--wide:first-child {
      grid-column: span 2;
      flex-direction: row;
      align-items: center;
    }
    .feature-card--wide:last-child { grid-column: span 3; }
  }

  .feature-card--dark {
    background: var(--card-dark-gradient);
  }

  .feature-card--accent {
    border-color: rgba(232,72,132,0.2);
  }

  .feature-card__icon-wrap {
    margin-block-end: var(--sp-md);
  }

  .feature-card__icon {
    width: 52px;
    height: 52px;
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    display: grid;
    place-items: center;
    transition: border-color var(--duration-fast) var(--ease-out);
  }

  .feature-card:hover .feature-card__icon {
    border-color: rgba(232,72,132,0.4);
  }

  .feature-card__title {
    font-size: 1.125rem;
    font-weight: var(--fw-bold);
    letter-spacing: -0.02em;
    color: var(--text);
    margin-block-end: var(--sp-sm);
  }

  .feature-card__desc {
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--text-2);
    text-wrap: pretty;
    max-width: 50ch;
  }

  .feature-card__body { flex: 1; }

  .feature-card__visual {
    flex-shrink: 0;
    width: 200px;
    height: 140px;
    position: relative;
  }

  @media (max-width: 1023px) {
    .feature-card__visual {
      width: 100%;
      height: 120px;
    }
  }

  /* Map preview */
  .map-preview {
    width: 100%;
    height: 100%;
    background: var(--bg-subtle);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
  }

  .map-grid {
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(var(--map-grid-color) 1px, transparent 1px),
      linear-gradient(90deg, var(--map-grid-color) 1px, transparent 1px);
    background-size: 24px 24px;
  }

  .map-pin {
    position: absolute;
    width: 14px;
    height: 14px;
    display: grid;
    place-items: center;
  }

  .map-pin span {
    width: 10px;
    height: 10px;
    background: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(232,72,132,0.6);
    animation: mp-pulse 2s ease-in-out infinite;
  }

  .mp-1 { top: 25%; left: 30%; }
  .mp-2 { top: 55%; left: 60%; }
  .mp-3 { top: 70%; left: 25%; }
  .mp-4 { top: 35%; left: 75%; }

  .mp-2 span { animation-delay: 0.5s; width: 8px; height: 8px; }
  .mp-3 span { animation-delay: 1s; background: var(--color-accent); box-shadow: 0 0 8px rgba(255,209,102,0.5); }
  .mp-4 span { animation-delay: 1.5s; width: 6px; height: 6px; }

  @keyframes mp-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.25); }
  }

  /* Community avatars */
  .community-avatars {
    display: flex;
    align-items: center;
    margin-block-start: var(--sp-xl);
  }

  .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--bg-card);
    background: var(--color-primary);
    color: #fff;
    font-size: 0.8125rem;
    font-weight: var(--fw-bold);
    display: grid;
    place-items: center;
    margin-inline-start: -10px;
    transition: transform var(--duration-fast) var(--ease-spring);
    z-index: calc(5 - var(--i, 0));
  }

  .avatar:first-child { margin-inline-start: 0; }
  .avatar:nth-child(2) { background: var(--color-accent); color: var(--color-secondary); }
  .avatar:nth-child(3) { background: var(--color-success); color: var(--color-secondary); }
  .avatar:nth-child(4) { background: #7C5CBF; }
  .avatar--more {
    background: var(--border);
    font-size: 0.6875rem;
    color: var(--text-2);
    width: auto;
    padding-inline: var(--sp-sm);
    border-radius: var(--radius-full);
  }

  .community-avatars:hover .avatar:hover {
    transform: translateY(-4px);
    z-index: 10;
  }
}

/* ──────────────────────────────────────────────
   12. How It Works
   ────────────────────────────────────────────── */
@layer components {
  .how {
    padding-block: var(--sp-4xl);
    border-block: 1px solid var(--border);
  }

  .steps {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--sp-3xl);
  }

  .steps__line {
    display: none;
    position: absolute;
    left: 40px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, transparent, var(--border) 10%, var(--border) 90%, transparent);
  }

  @media (min-width: 640px) {
    .steps__line { display: block; }
  }

  .step {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--sp-lg);
    align-items: start;
    position: relative;
  }

  @media (min-width: 640px) {
    .step {
      grid-template-columns: 80px 1fr auto;
      align-items: center;
    }
    .step--reverse { grid-template-columns: 80px 1fr auto; }
  }

  .step__number {
    font-size: 2.5rem;
    font-weight: var(--fw-black);
    letter-spacing: -0.05em;
    color: var(--border);
    line-height: 1;
    font-variant-numeric: tabular-nums;
    transition: color var(--duration-normal) var(--ease-out);
  }

  .step.is-visible .step__number {
    color: var(--color-primary);
  }

  .step__body { flex: 1; }

  .step__title {
    font-size: 1.375rem;
    font-weight: var(--fw-bold);
    letter-spacing: -0.02em;
    color: var(--text);
    margin-block-end: var(--sp-sm);
  }

  .step__desc {
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--text-2);
    max-width: 45ch;
    text-wrap: pretty;
  }

  .step__visual {
    width: 220px;
    height: 160px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
    flex-shrink: 0;
  }

  @media (max-width: 639px) {
    .step__visual { width: 100%; height: 140px; }
  }

  .mini-map {
    width: 100%;
    height: 100%;
    background: var(--bg-subtle);
    position: relative;
    overflow: hidden;
  }

  .mini-map::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(var(--map-grid-color) 1px, transparent 1px),
      linear-gradient(90deg, var(--map-grid-color) 1px, transparent 1px);
    background-size: 20px 20px;
  }

  .mini-map__pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    translate: -50% -50%;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(232,72,132,0.08);
    border: 1px solid rgba(232,72,132,0.2);
    animation: expand-pulse 2s ease-out infinite;
  }

  .mini-map__pulse::before,
  .mini-map__pulse::after {
    content: '';
    position: absolute;
    inset: 10px;
    border-radius: 50%;
    background: rgba(232,72,132,0.08);
    border: 1px solid rgba(232,72,132,0.2);
    animation: expand-pulse 2s ease-out infinite 0.5s;
  }
  .mini-map__pulse::after {
    inset: 20px;
    animation-delay: 1s;
  }

  @keyframes expand-pulse {
    0%   { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(2.5); opacity: 0; }
  }

  .mini-map__pin {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
  }

  .mini-map__pin--you {
    top: 50%;
    left: 50%;
    translate: -50% -50%;
    background: var(--color-primary);
    box-shadow: 0 0 12px rgba(232,72,132,0.8);
    z-index: 1;
  }

  .mini-map__pin--1 {
    top: 25%;
    left: 65%;
    background: var(--color-accent);
    animation: mp-pulse 2.5s ease-in-out infinite;
  }

  .mini-map__pin--2 {
    bottom: 30%;
    left: 30%;
    background: var(--color-accent);
    animation: mp-pulse 2.5s ease-in-out infinite 1s;
  }

  .chips-demo {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-sm);
    padding: var(--sp-md);
    align-content: center;
    height: 100%;
  }

  .chip {
    padding: 6px var(--sp-md);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: var(--fw-bold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    color: var(--text-2);
    transition: all var(--duration-fast) var(--ease-out);
  }

  .chip--active {
    background: rgba(232,72,132,0.12);
    border-color: rgba(232,72,132,0.4);
    color: var(--color-primary);
  }

  :root[data-theme="light"] .chip--active {
    background: rgba(232,72,132,0.08);
  }

  .discover-card {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  .discover-card__img {
    flex: 1;
    background: var(--discover-img-gradient);
    position: relative;
  }

  .discover-card__img::before {
    content: '🌶️';
    position: absolute;
    top: 50%;
    left: 50%;
    translate: -50% -50%;
    font-size: 2rem;
  }

  .discover-card__content {
    padding: var(--sp-sm) var(--sp-md);
    background: var(--bg-subtle);
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    font-size: 0.8125rem;
    color: var(--text-2);
  }

  .discover-card__badge {
    font-size: 0.625rem;
    font-weight: var(--fw-bold);
    letter-spacing: 0.1em;
    color: var(--color-success);
    background: rgba(6,214,160,0.1);
    border-radius: var(--radius-full);
    padding: 2px 6px;
    white-space: nowrap;
  }
}

/* ──────────────────────────────────────────────
   13. Community / Testimonials
   ────────────────────────────────────────────── */
@layer components {
  .community {
    padding-block: var(--sp-4xl);
    position: relative;
    overflow: hidden;
  }

  .community__bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 50%, rgba(232,72,132,0.04) 0%, transparent 70%);
    pointer-events: none;
  }

  :root[data-theme="light"] .community__bg {
    background: radial-gradient(ellipse 80% 60% at 50% 50%, rgba(232,72,132,0.025) 0%, transparent 70%);
  }

  .testimonials {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--sp-md);
    align-items: stretch;
  }

  @media (min-width: 640px) {
    .testimonials { grid-template-columns: repeat(2, 1fr); }
  }

  @media (min-width: 1024px) {
    .testimonials { grid-template-columns: repeat(3, 1fr); }
  }

  .testimonial {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--sp-xl);
    display: flex;
    flex-direction: column;
    gap: var(--sp-lg);
    transition:
      border-color var(--duration-normal) var(--ease-out),
      transform var(--duration-normal) var(--ease-spring),
      box-shadow var(--duration-normal) var(--ease-out);
    position: relative;
  }

  .testimonial:hover {
    border-color: rgba(232,72,132,0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
  }

  .testimonial--featured {
    border-color: rgba(232,72,132,0.25);
    background: linear-gradient(160deg, rgba(232,72,132,0.05), var(--bg-card));
  }

  :root[data-theme="light"] .testimonial--featured {
    background: linear-gradient(160deg, rgba(232,72,132,0.04), var(--bg-card));
  }

  .testimonial blockquote p {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--text-2);
    text-wrap: pretty;
  }

  .testimonial--featured blockquote p {
    color: var(--text);
  }

  .testimonial__author {
    display: flex;
    align-items: center;
    gap: var(--sp-md);
    margin-block-start: auto;
  }

  .testimonial__author cite {
    font-style: normal;
    font-weight: var(--fw-semibold);
    font-size: 0.9375rem;
    color: var(--text);
  }

  .testimonial__author p {
    font-size: 0.8125rem;
    color: var(--text-2);
    margin-block-start: 2px;
  }

  .testimonial__avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-subtle);
    border: 2px solid var(--border);
    display: grid;
    place-items: center;
    font-weight: var(--fw-bold);
    font-size: 1rem;
    color: var(--text);
    flex-shrink: 0;
  }

  .testimonial__avatar--gold {
    background: linear-gradient(135deg, rgba(255,209,102,0.2), rgba(255,209,102,0.05));
    border-color: rgba(255,209,102,0.4);
    color: var(--color-accent);
  }

  :root[data-theme="light"] .testimonial__avatar--gold {
    background: linear-gradient(135deg, rgba(255,209,102,0.3), rgba(255,209,102,0.1));
  }

  .testimonial__badge {
    position: absolute;
    top: var(--sp-md);
    right: var(--sp-md);
    font-size: 0.625rem;
    font-weight: var(--fw-bold);
    letter-spacing: 0.12em;
    color: var(--color-accent);
    background: rgba(255,209,102,0.1);
    border-radius: var(--radius-full);
    padding: 3px 8px;
  }

  :root[data-theme="light"] .testimonial__badge {
    background: rgba(255,209,102,0.18);
  }
}

/* ──────────────────────────────────────────────
   14. Waitlist / CTA
   ────────────────────────────────────────────── */
@layer components {
  .waitlist {
    padding-block: var(--sp-4xl);
    overflow: hidden;
  }

  .waitlist__inner {
    max-width: 800px;
    margin-inline: auto;
    padding-inline: var(--sp-lg);
    position: relative;
  }

  .waitlist__glow {
    position: absolute;
    inset: -80px;
    background: radial-gradient(ellipse 70% 50% at 50% 50%, rgba(232,72,132,0.12) 0%, transparent 70%);
    pointer-events: none;
    animation: breathe 5s ease-in-out infinite;
  }

  :root[data-theme="light"] .waitlist__glow {
    background: radial-gradient(ellipse 70% 50% at 50% 50%, rgba(232,72,132,0.07) 0%, transparent 70%);
  }

  .waitlist__content {
    position: relative;
    text-align: center;
  }

  .waitlist__heading {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: var(--fw-black);
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--text);
    margin-block: var(--sp-md) var(--sp-lg);
    text-wrap: balance;
  }

  .waitlist__heading em {
    font-style: normal;
    color: var(--color-primary);
  }

  .waitlist__sub {
    font-size: 1.0625rem;
    line-height: 1.65;
    color: var(--text-2);
    max-width: 50ch;
    margin-inline: auto;
    margin-block-end: var(--sp-xl);
    text-wrap: pretty;
  }

  .waitlist__form {
    display: flex;
    flex-direction: column;
    gap: var(--sp-sm);
  }

  .form-row {
    display: flex;
    gap: var(--sp-sm);
    flex-direction: column;
  }

  @media (min-width: 480px) {
    .form-row { flex-direction: row; }
  }

  .form-input {
    flex: 1;
    padding: var(--sp-md) var(--sp-lg);
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    font-family: var(--font-family);
    font-size: 1rem;
    transition:
      border-color var(--duration-fast) var(--ease-out),
      box-shadow var(--duration-fast) var(--ease-out);
  }

  .form-input::placeholder { color: var(--text-2); }

  .form-input:disabled {
    cursor: not-allowed;
    opacity: 0.68;
    background: var(--bg-subtle);
  }

  .form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(232,72,132,0.15);
  }

  :root[data-theme="light"] .form-input:focus {
    box-shadow: 0 0 0 3px rgba(232,72,132,0.1);
  }

  .form-input:user-invalid {
    border-color: #EF476F;
  }

  .form-message {
    font-size: 0.875rem;
    padding: var(--sp-sm) var(--sp-md);
    border-radius: var(--radius-sm);
    text-align: left;
  }

  .form-message--error {
    background: rgba(239,71,111,0.1);
    color: #EF476F;
    border: 1px solid rgba(239,71,111,0.2);
  }

  .form-message--success {
    background: rgba(6,214,160,0.1);
    color: var(--color-success);
    border: 1px solid rgba(6,214,160,0.2);
  }

  .form-message--info {
    background: rgba(255,209,102,0.1);
    color: var(--text-2);
    border: 1px solid rgba(255,209,102,0.28);
  }

  .form-message[hidden] { display: none; }

  .form-privacy {
    font-size: 0.8125rem;
    color: var(--text-2);
    margin-block-start: var(--sp-sm);
  }

  .waitlist__social-proof {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-md);
    margin-block-start: var(--sp-xl);
    font-size: 0.9375rem;
    color: var(--text-2);
  }

  .ws-avatars { display: flex; }

  .wsav {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--bg);
    background: var(--c, var(--color-primary));
    color: #fff;
    font-size: 0.75rem;
    font-weight: var(--fw-bold);
    display: grid;
    place-items: center;
    margin-inline-start: -8px;
  }

  .wsav:first-child { margin-inline-start: 0; }

  .waitlist__social-proof strong { color: var(--text); }
}

/* ──────────────────────────────────────────────
   15. Footer
   ────────────────────────────────────────────── */
@layer components {
  .footer {
    border-top: 1px solid var(--border);
    padding-block: var(--sp-3xl) var(--sp-xl);
  }

  .footer__inner {
    display: flex;
    flex-direction: column;
    gap: var(--sp-3xl);
    margin-block-end: var(--sp-3xl);
  }

  @media (min-width: 768px) {
    .footer__inner {
      flex-direction: row;
      justify-content: space-between;
    }
  }

  .footer__brand p {
    font-size: 0.9375rem;
    color: var(--text-2);
    margin-block-start: var(--sp-sm);
    max-width: 30ch;
  }

  .footer__brand .nav__logo { margin-block-end: var(--sp-sm); }

  .footer__nav {
    display: flex;
    gap: var(--sp-3xl);
    flex-wrap: wrap;
  }

  .footer__col h3 {
    font-size: 0.8125rem;
    font-weight: var(--fw-bold);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-2);
    margin-block-end: var(--sp-md);
  }

  .footer__col ul {
    display: flex;
    flex-direction: column;
    gap: var(--sp-sm);
  }

  .footer__col a {
    font-size: 0.9375rem;
    color: var(--text-2);
    transition: color var(--duration-fast) var(--ease-out);
  }

  .footer__col a:hover { color: var(--text); }

  .footer__disabled {
    display: inline-block;
    font-size: 0.9375rem;
    color: var(--text-2);
    opacity: 0.65;
  }

  .footer__bottom {
    border-top: 1px solid var(--border);
    padding-block-start: var(--sp-lg);
    font-size: 0.875rem;
    color: var(--text-2);
  }
}

/* ──────────────────────────────────────────────
   16. Scroll-driven Animations (Modern API)
   ────────────────────────────────────────────── */
@supports (animation-timeline: scroll()) {
  .nav {
    animation: nav-appear linear both;
    animation-timeline: scroll(root);
    animation-range: 0px 80px;
  }

  @keyframes nav-appear {
    from {
      background-color: transparent;
      border-color: transparent;
    }
    to {
      background-color: var(--nav-blur-bg);
      border-color: var(--border);
      backdrop-filter: blur(20px);
    }
  }
}

/* ──────────────────────────────────────────────
   17. Theme Transition (smooth color switch)
   ────────────────────────────────────────────── */
@layer utilities {
  /* All color-bearing elements transition smoothly */
  .feature-card,
  .testimonial,
  .fcard,
  .marquee-strip,
  .step__visual,
  .nav,
  .nav__mobile,
  .form-input,
  .footer,
  .hero__badge,
  .avatar,
  .chip,
  .map-preview,
  .mini-map,
  .discover-card__content {
    transition:
      background-color var(--duration-slow) var(--ease-out),
      border-color var(--duration-slow) var(--ease-out),
      color var(--duration-slow) var(--ease-out);
  }
}