/* ═══════════════════════════════════════════════════════
   WhatColorsGoWith.com — Premium Design System v2
   ═══════════════════════════════════════════════════════ */

/* ── Reset ──────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
button{font:inherit;cursor:pointer;border:none;background:none}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
ul,ol{list-style:none}

/* ── Design Tokens ─────────────────────────────────── */
:root{
  --bg:        #FAFAF9;
  --bg-2:      #F5F5F4;
  --bg-3:      #EEEDED;
  --bg-4:      #E2E1DF;
  --surface:   #FFFFFF;
  --surface-2: rgba(255,255,255,.7);

  --border:    #E8E6E3;
  --border-2:  #D6D3CE;
  --border-3:  #B8B4AD;

  --text:      #0C0C0D;
  --text-2:    #44444A;
  --text-3:    #8C8C94;
  --text-4:    #C4C4C9;

  --accent:    #0C0C0D;
  --accent-2:  #44444A;
  --accent-soft: rgba(12,12,13,.06);

  --page-color:#888;

  --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-text: linear-gradient(135deg, #667eea, #764ba2, #f5576c);

  --font:      system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --mono:      ui-monospace, 'SF Mono', SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;

  --ease:      cubic-bezier(.4, 0, .2, 1);
  --ease-out:  cubic-bezier(0, 0, .2, 1);
  --ease-in:   cubic-bezier(.4, 0, 1, 1);
  --ease-spring: cubic-bezier(.175, .885, .32, 1.275);
  --ease-bounce: cubic-bezier(.34, 1.56, .64, 1);

  --r-xs:  6px;
  --r-sm:  8px;
  --r:     12px;
  --r-lg:  16px;
  --r-xl:  20px;
  --r-2xl: 24px;
  --r-full:9999px;

  --shadow-xs: 0 1px 2px rgba(0,0,0,.04);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px -1px rgba(0,0,0,.04);
  --shadow:    0 4px 6px -1px rgba(0,0,0,.06), 0 2px 4px -2px rgba(0,0,0,.05);
  --shadow-md: 0 10px 20px -5px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.04);
  --shadow-lg: 0 20px 40px -10px rgba(0,0,0,.1), 0 8px 16px -8px rgba(0,0,0,.06);
  --shadow-xl: 0 32px 64px -16px rgba(0,0,0,.14);
  --shadow-color: 0 10px 30px -8px color-mix(in srgb, var(--page-color) 30%, transparent);

  --nav-h: 60px;
}

/* ── Dark Mode ─────────────────────────────────────── */
[data-theme="dark"]{
  --bg:        #0C0C0D;
  --bg-2:      #141416;
  --bg-3:      #1C1C1F;
  --bg-4:      #26262A;
  --surface:   #18181B;
  --surface-2: rgba(24,24,27,.8);

  --border:    #27272A;
  --border-2:  #3F3F46;
  --border-3:  #52525B;

  --text:      #FAFAFA;
  --text-2:    #A1A1AA;
  --text-3:    #71717A;
  --text-4:    #3F3F46;

  --accent:    #FAFAFA;
  --accent-2:  #D4D4D8;
  --accent-soft: rgba(250,250,250,.08);

  --shadow-xs: 0 1px 2px rgba(0,0,0,.3);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.4);
  --shadow:    0 4px 6px rgba(0,0,0,.4);
  --shadow-md: 0 10px 20px rgba(0,0,0,.5);
  --shadow-lg: 0 20px 40px rgba(0,0,0,.6);
  --shadow-xl: 0 32px 64px rgba(0,0,0,.7);
}

/* ── Base ───────────────────────────────────────────── */
html{
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
}
body{
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
  transition: background .3s var(--ease), color .3s var(--ease);
}
::selection{background: var(--page-color); color: #fff}
.container{max-width: 1100px; margin: 0 auto; padding: 0 24px}

/* ── NAV ────────────────────────────────────────────── */
.nav{
  position: sticky; top: 0; z-index: 200;
  background: var(--surface-2);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
  transition: background .3s, border-color .3s;
}
.nav .container{
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}
.nav-logo{
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -.5px;
  transition: opacity .2s;
}
.nav-logo:hover{opacity:.7}
.nav-logo sup{
  font-size: .4rem; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  vertical-align: super; color: var(--text-3); margin-left: 2px;
}
.nav-links{display: flex; align-items: center; gap: 2px}
.nav-search{display: flex; align-items: center; gap: 6px}
.nav-search input{
  width: 180px; padding: 7px 14px;
  background: var(--accent-soft);
  border: 1px solid transparent;
  border-radius: var(--r-full);
  font-size: .8rem; color: var(--text);
  outline: none;
  transition: all .25s var(--ease);
}
.nav-search input::placeholder{color: var(--text-3)}
.nav-search input:focus{
  border-color: var(--border-2);
  background: var(--surface);
  width: 220px;
  box-shadow: var(--shadow-sm);
}
.nav-search button{
  padding: 7px 16px;
  background: var(--accent); color: var(--bg);
  border-radius: var(--r-full);
  font-size: .75rem; font-weight: 600;
  transition: all .2s var(--ease);
}
.nav-search button:hover{opacity: .8; transform: translateY(-1px)}
.nav-dir-link{
  font-size: .78rem; font-weight: 500; color: var(--text-2);
  padding: 6px 14px;
  border-radius: var(--r-full);
  transition: all .2s var(--ease);
}
.nav-dir-link:hover{
  color: var(--text);
  background: var(--accent-soft);
}
.nav-dir-link--active{
  background: var(--accent); color: var(--bg) !important;
}
/* Theme toggle */
.theme-toggle{
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--r-full);
  color: var(--text-2);
  transition: all .2s var(--ease);
  margin-left: 4px;
  flex-shrink: 0;
}
.theme-toggle:hover{background: var(--accent-soft); color: var(--text)}
.theme-toggle svg{width: 18px; height: 18px}
[data-theme="dark"] .theme-toggle .icon-sun{display:none}
[data-theme="dark"] .theme-toggle .icon-moon{display:block}
:root .theme-toggle .icon-moon{display:none}
:root .theme-toggle .icon-sun{display:block}
[data-theme="dark"] .theme-toggle .icon-sun{display:block}
[data-theme="dark"] .theme-toggle .icon-moon{display:none}

/* ── Section Headers ───────────────────────────────── */
.sec-hd{margin-bottom: 36px}
.sec-label{
  font-size: .65rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--text-3); margin-bottom: 8px;
}
.sec-title{
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  font-weight: 800; letter-spacing: -.03em;
  color: var(--text); line-height: 1.2;
  margin-bottom: 6px;
}
.sec-desc{
  font-size: .88rem; color: var(--text-2);
  max-width: 480px; line-height: 1.65;
}

/* ── HOME HERO ─────────────────────────────────────── */
.home-hero{
  padding: 100px 0 80px;
  text-align: center;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.home-hero::before{
  content: '';
  position: absolute;
  top: -200px; left: 50%; transform: translateX(-50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(102,126,234,.08) 0%, rgba(245,87,108,.06) 40%, transparent 70%);
  pointer-events: none;
}
[data-theme="dark"] .home-hero::before{
  background: radial-gradient(circle, rgba(102,126,234,.12) 0%, rgba(245,87,108,.08) 40%, transparent 70%);
}
.hero-circles{
  display: flex; justify-content: center;
  margin-bottom: 36px;
}
.hero-circle{
  width: 44px; height: 44px; border-radius: 50%;
  border: 3px solid var(--surface);
  box-shadow: var(--shadow);
  margin-left: -12px;
  transition: all .4s var(--ease-spring);
}
.hero-circle:first-child{margin-left: 0}
.hero-circles:hover .hero-circle{margin-left: -6px}
.hero-circles:hover .hero-circle:first-child{margin-left: 0}
.home-eyebrow{
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .65rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--text-3); margin-bottom: 20px;
  padding: 6px 16px;
  background: var(--accent-soft);
  border-radius: var(--r-full);
  border: 1px solid var(--border);
}
.home-h1{
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -.05em;
  color: var(--text);
  margin-bottom: 20px;
  position: relative;
}
.home-h1 em{
  font-style: normal;
  background: var(--gradient-text);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 4s ease infinite;
}
@keyframes shimmer{
  0%{background-position: 0% center}
  50%{background-position: 100% center}
  100%{background-position: 0% center}
}
.home-sub{
  font-size: .95rem; color: var(--text-2);
  margin-bottom: 40px;
  max-width: 420px; margin-left: auto; margin-right: auto;
  line-height: 1.6;
}

/* Search bar */
.home-search-wrap{
  max-width: 520px; margin: 0 auto 28px;
  display: flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all .3s var(--ease);
  position: relative;
}
.home-search-wrap:focus-within{
  border-color: var(--border-2);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.home-search-wrap input{
  flex: 1; padding: 16px 22px;
  border: none; outline: none;
  font-family: var(--font); font-size: .92rem; color: var(--text);
  background: transparent;
}
.home-search-wrap input::placeholder{color: var(--text-4)}
.home-search-wrap button{
  margin: 6px;
  padding: 10px 24px;
  background: var(--accent); color: var(--bg);
  border-radius: var(--r-lg);
  font-weight: 700; font-size: .84rem;
  transition: all .2s var(--ease); white-space: nowrap; flex-shrink: 0;
  letter-spacing: -.01em;
}
.home-search-wrap button:hover{opacity: .85; transform: translateY(-1px)}
.home-suggest{font-size: .78rem; color: var(--text-3); position: relative}
.home-suggest a{
  color: var(--text-2);
  padding: 3px 10px;
  background: var(--accent-soft);
  border-radius: var(--r-full);
  font-weight: 500;
  margin: 0 2px;
  transition: all .2s var(--ease);
  display: inline-block;
}
.home-suggest a:hover{background: var(--accent); color: var(--bg)}

/* ── HOME: Color by Mood ───────────────────────────── */
.mood-section{padding: 72px 0; border-top: 1px solid var(--border)}
.mood-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.mood-tile{
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 10px;
  padding: 32px 16px;
  border-radius: var(--r-xl);
  background: linear-gradient(145deg, var(--m1), var(--m2));
  color: #fff;
  text-align: center;
  position: relative; overflow: hidden;
  transition: all .3s var(--ease);
}
.mood-tile::after{
  content: ''; position: absolute; inset: 0;
  background: rgba(0,0,0,.08);
  transition: background .3s; pointer-events: none;
  border-radius: var(--r-xl);
}
.mood-tile:hover::after{background: transparent}
.mood-tile:hover{transform: translateY(-4px) scale(1.02); box-shadow: var(--shadow-lg)}
.mood-emoji{font-size: 1.6rem; position: relative; z-index: 1; line-height: 1}
.mood-name{
  font-size: .8rem; font-weight: 700;
  letter-spacing: .03em;
  position: relative; z-index: 1;
}

/* ── HOME: Trending Colors ─────────────────────────── */
.trending-section{padding: 72px 0; border-top: 1px solid var(--border)}
.trending-section .sec-hd{margin-bottom: 28px}
.explore-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: 12px;
}
.explore-card{
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: all .3s var(--ease);
}
.explore-card:hover{transform: translateY(-4px); box-shadow: var(--shadow-md)}
.explore-swatch{height: 80px; transition: height .3s var(--ease)}
.explore-card:hover .explore-swatch{height: 88px}
.explore-label{padding: 10px 12px}
.explore-name{font-size: .74rem; font-weight: 600; color: var(--text); display: block; margin-bottom: 2px}
.explore-hex{font-family: var(--mono); font-size: .62rem; color: var(--text-3); font-weight: 500}

/* ── HOME: How it works ────────────────────────────── */
.how-section{
  padding: 72px 0 80px;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
}
.how-grid{
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; margin-top: 36px;
}
.how-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 32px 26px;
  transition: all .25s var(--ease);
  position: relative;
}
.how-card:hover{transform: translateY(-2px); box-shadow: var(--shadow)}
.how-num{
  font-size: 2.2rem; font-weight: 900;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1; margin-bottom: 16px;
  opacity: .6;
}
.how-card h3{font-size: .9rem; font-weight: 700; color: var(--text); margin-bottom: 8px; letter-spacing: -.01em}
.how-card p{font-size: .8rem; color: var(--text-2); line-height: 1.65}

/* ── Breadcrumb ────────────────────────────────────── */
.breadcrumb{padding: 12px 0; background: var(--bg-2); border-bottom: 1px solid var(--border)}
.breadcrumb-list{
  list-style: none; display: flex; align-items: center;
  font-size: .74rem; color: var(--text-3);
}
.breadcrumb-list li{display: flex; align-items: center}
.breadcrumb-list li+li::before{content: '/'; margin: 0 10px; color: var(--text-4)}
.breadcrumb-list a{color: var(--text-2); transition: color .15s}
.breadcrumb-list a:hover{color: var(--text)}
.breadcrumb-list li:last-child{color: var(--text); font-weight: 600}

/* ── COLOR PAGE: Hero ──────────────────────────────── */
.color-hero{
  padding: 64px 0 56px;
  background: var(--page-color);
  position: relative; overflow: hidden;
}
.color-hero::before{
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(0,0,0,.2) 0%, rgba(0,0,0,.02) 40%, rgba(0,0,0,.25) 100%);
  pointer-events: none;
}
.color-hero::after{
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,.08) 0%, transparent 60%);
  pointer-events: none;
}
.color-hero-inner{position: relative; z-index: 1; color: #fff}
.hero-eyebrow{
  font-size: .6rem; font-weight: 700;
  letter-spacing: .18em; text-transform: uppercase;
  color: rgba(255,255,255,.45); margin-bottom: 10px;
}
.hero-title{
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 900; letter-spacing: -.04em; line-height: 1.05;
  margin-bottom: 24px;
  text-shadow: 0 2px 20px rgba(0,0,0,.12);
}
.hero-hex-pill{
  display: inline-flex; align-items: center; gap: 12px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  backdrop-filter: blur(12px);
  padding: 8px 16px; border-radius: var(--r-full);
  transition: background .2s;
}
.hero-hex-pill:hover{background: rgba(255,255,255,.18)}
.hero-hex-pill code{
  font-family: var(--mono);
  font-size: .88rem; font-weight: 600; color: #fff; letter-spacing: .05em;
}
.hero-copy-btn{
  padding: 5px 14px;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: var(--r-full);
  font-size: .68rem; font-weight: 700; color: #fff;
  letter-spacing: .02em; text-transform: uppercase;
  transition: all .2s var(--ease);
}
.hero-copy-btn:hover{background: rgba(255,255,255,.32); transform: translateY(-1px)}

/* ── Palette Cards ─────────────────────────────────── */
.palette-section{padding: 64px 0 56px}
.palette-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}
.pair-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  transition: all .35s var(--ease);
  animation: rise .5s var(--ease-out) both;
}
.pair-card:hover{
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-2);
}
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
@keyframes cardIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.pair-card:nth-child(1){animation-delay:.02s}
.pair-card:nth-child(2){animation-delay:.05s}
.pair-card:nth-child(3){animation-delay:.08s}
.pair-card:nth-child(4){animation-delay:.11s}
.pair-card:nth-child(5){animation-delay:.14s}
.pair-card:nth-child(6){animation-delay:.17s}
.pair-card:nth-child(7){animation-delay:.2s}
.pair-card:nth-child(8){animation-delay:.23s}
.pair-card:nth-child(9){animation-delay:.26s}
.pair-card:nth-child(10){animation-delay:.29s}
.pair-card:nth-child(11){animation-delay:.32s}
.pair-card:nth-child(12){animation-delay:.35s}

/* ── Show More Button ──────────────────────────────── */
.show-more-wrap{text-align: center; padding: 36px 0 0}
.btn-show-more{
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  font-family: var(--font); font-size: .84rem; font-weight: 600;
  cursor: pointer;
  transition: all .25s var(--ease);
}
.btn-show-more:hover{
  background: var(--accent); color: var(--bg);
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.btn-show-more:disabled{opacity:.4;cursor:default;transform:none}
.btn-show-more-spinner{
  width: 14px; height: 14px;
  border: 2px solid var(--text-4);
  border-top-color: var(--text);
  border-radius: 50%;
  animation: spin .6s linear infinite;
}
.btn-show-more:hover .btn-show-more-spinner{
  border-color: rgba(255,255,255,.3);
  border-top-color: #fff;
}

/* Card swatches */
.pair-swatch{display: flex; height: 160px}
.pair-half{
  flex: 1; position: relative; overflow: hidden;
  transition: flex .3s var(--ease);
}
.pair-half:hover{flex: 1.15}
.pair-half-label{
  position: absolute; bottom: 8px; left: 50%;
  transform: translateX(-50%) translateY(4px);
  opacity: 0;
  background: rgba(0,0,0,.55); color: #fff;
  font-family: var(--mono); font-size: .6rem; font-weight: 600;
  padding: 4px 10px; border-radius: var(--r-full);
  white-space: nowrap;
  transition: all .2s var(--ease);
  cursor: pointer;
  backdrop-filter: blur(8px);
  letter-spacing: .03em;
}
.pair-half:hover .pair-half-label{opacity: 1; transform: translateX(-50%) translateY(0)}

/* Card body */
.pair-body{padding: 14px 16px 16px}
.pair-body-top{
  display: flex; align-items: flex-start;
  justify-content: space-between; gap: 8px;
  margin-bottom: 8px;
}
.pair-name{
  font-size: .84rem; font-weight: 600; color: var(--text);
  display: block; line-height: 1.35; flex: 1;
  transition: color .15s;
  letter-spacing: -.01em;
}
.pair-name:hover{color: var(--text-2)}

/* Heart button */
.heart-btn{
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px;
  background: var(--accent-soft);
  border: 1px solid transparent;
  border-radius: var(--r-full);
  font-size: .68rem; font-weight: 600; color: var(--text-3);
  cursor: pointer; flex-shrink: 0;
  transition: all .2s var(--ease);
}
.heart-btn:hover{
  background: var(--bg-3);
  color: var(--text-2);
  transform: scale(1.05);
}
.heart-icon{width: 13px; height: 13px; flex-shrink: 0; color: var(--text-3); transition: all .2s}
.heart-count{font-size: .65rem; font-weight: 600}
.heart-btn.liked{background: #FEE2E8; border-color: #FECDD3; color: #E11D48}
.heart-btn.liked .heart-icon{color: #E11D48; fill: #E11D48}
.heart-btn.liked .heart-count{color: #E11D48}
@keyframes heartPop{0%{transform:scale(1)}40%{transform:scale(1.2)}70%{transform:scale(.92)}100%{transform:scale(1)}}
.heart-pop{animation: heartPop .4s var(--ease-spring) both}

/* Tags */
.pair-tags{display: flex; flex-wrap: wrap; gap: 4px}
.pair-tag{
  font-size: .58rem; font-weight: 600;
  letter-spacing: .05em; text-transform: uppercase;
  color: var(--text-3);
  background: var(--accent-soft);
  border-radius: var(--r-full); padding: 3px 8px;
  transition: all .2s;
}
.pair-card:hover .pair-tag{color: var(--text-2); background: var(--bg-3)}

/* ── Where to Use ──────────────────────────────────── */
.use-section{
  padding: 64px 0;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.use-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px; margin-top: 32px;
}
.use-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px 20px;
  transition: all .25s var(--ease);
}
.use-card:hover{transform: translateY(-3px); box-shadow: var(--shadow)}
.use-icon{font-size: 1.4rem; margin-bottom: 12px; display: block; line-height: 1}
.use-card h3{font-size: .82rem; font-weight: 700; color: var(--text); margin-bottom: 6px; letter-spacing: -.01em}
.use-card p{font-size: .74rem; color: var(--text-2); line-height: 1.6}

/* ── Tips ──────────────────────────────────────────── */
.tips-section{padding: 64px 0; border-bottom: 1px solid var(--border)}
.tips-grid{
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 12px; margin-top: 32px;
}
.tip-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 22px 24px;
  border-left: 3px solid var(--page-color);
  transition: all .25s var(--ease);
}
.tip-card:hover{box-shadow: var(--shadow); transform: translateY(-1px)}
.tip-card h3{font-size: .84rem; font-weight: 700; color: var(--text); margin-bottom: 6px}
.tip-card p{font-size: .78rem; color: var(--text-2); line-height: 1.65}

/* ── Related ───────────────────────────────────────── */
.related-section{padding: 56px 0 72px}
.related-wrap{display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px}
.related-pill{
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px 8px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  font-size: .78rem; font-weight: 500; color: var(--text-2);
  transition: all .25s var(--ease);
}
.related-pill:hover{
  border-color: var(--border-2); color: var(--text);
  transform: translateY(-2px); box-shadow: var(--shadow-sm);
}
.rel-dot{width: 20px; height: 20px; border-radius: 50%; flex-shrink: 0; box-shadow: inset 0 0 0 1px rgba(0,0,0,.08)}

/* ── Error / 404 ───────────────────────────────────── */
.error-wrap{
  flex: 1; display: flex; flex-direction: column;
  justify-content: center; align-items: center;
  padding: 100px 24px; text-align: center;
}
.error-code{
  font-size: 6rem; font-weight: 900;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1; margin-bottom: 16px;
  opacity: .5;
}
.error-wrap h1{font-size: 1.4rem; font-weight: 800; color: var(--text); margin-bottom: 10px; letter-spacing: -.02em}
.error-wrap p{font-size: .88rem; color: var(--text-2); margin-bottom: 28px}
.btn-home{
  display: inline-flex; align-items: center; gap: 6px;
  padding: 12px 28px;
  background: var(--accent); color: var(--bg);
  border-radius: var(--r-full); font-weight: 700; font-size: .84rem;
  transition: all .2s var(--ease);
}
.btn-home:hover{opacity: .85; transform: translateY(-2px); box-shadow: var(--shadow)}

/* ── Loading ───────────────────────────────────────── */
.load-wrap{
  flex: 1; display: flex; flex-direction: column;
  justify-content: center; align-items: center;
  padding: 100px 24px; text-align: center;
}
.load-ring{
  width: 36px; height: 36px;
  border: 2.5px solid var(--border-2);
  border-top-color: var(--text);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  margin-bottom: 28px;
}
@keyframes spin{to{transform: rotate(360deg)}}
.load-wrap h2{font-size: 1.2rem; font-weight: 700; color: var(--text); margin-bottom: 8px}
.load-wrap p{font-size: .84rem; color: var(--text-2); margin-bottom: 4px}
.load-status{font-size: .74rem; color: var(--text-3)}

/* ── Toast ─────────────────────────────────────────── */
.toast{
  position: fixed; bottom: 28px; left: 50%;
  transform: translateX(-50%) translateY(50px);
  background: var(--text); color: var(--bg);
  padding: 10px 22px; border-radius: var(--r-full);
  font-size: .78rem; font-weight: 600;
  pointer-events: none; opacity: 0;
  transition: all .35s var(--ease-spring);
  z-index: 999;
  box-shadow: var(--shadow-xl);
  letter-spacing: -.01em;
}
.toast.show{opacity: 1; transform: translateX(-50%) translateY(0)}

/* ── Footer ────────────────────────────────────────── */
.footer{
  margin-top: auto;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-2);
  transition: background .3s, border-color .3s;
}
.footer .container{
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.footer-copy{font-size: .7rem; color: var(--text-3); font-weight: 500}
.footer-links{display: flex; gap: 16px}
.footer-links a{font-size: .7rem; color: var(--text-3); transition: color .15s; font-weight: 500}
.footer-links a:hover{color: var(--text)}

/* ── Burger Menu ───────────────────────────────────── */
.burger{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  padding: 6px;
  cursor: pointer;
  z-index: 201;
  border-radius: var(--r-sm);
  transition: background .2s;
}
.burger:hover{background: var(--accent-soft)}
.burger span{
  display: block;
  width: 100%; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .3s var(--ease), opacity .2s;
  transform-origin: center;
}
.burger.open span:nth-child(1){transform: translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity: 0}
.burger.open span:nth-child(3){transform: translateY(-7px) rotate(-45deg)}

/* Mobile dropdown menu */
.mobile-menu{
  display: none;
  top: 0; left: 0; right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 16px 12px;
  padding-top: var(--nav-h);
  z-index: 199;
  box-shadow: var(--shadow-lg);
  transform: translateY(-110%);
  opacity: 0;
  transition: transform .3s var(--ease), opacity .25s;
}
.mobile-menu.open{
  transform: translateY(0);
  opacity: 1;
}
.mobile-menu a{
  display: block;
  padding: 12px 16px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--text);
  border-radius: var(--r);
  transition: background .15s;
}
.mobile-menu a:hover{background: var(--accent-soft)}

/* Mobile theme toggle */
.mobile-theme-btn{
  display: flex; align-items: center; gap: 10px;
  width: 100%;
  padding: 12px 16px;
  font-size: .9rem; font-weight: 500;
  color: var(--text);
  border-radius: var(--r);
  transition: background .15s;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}
.mobile-theme-btn:hover{background: var(--accent-soft)}
.mobile-theme-btn .icon-sun,
.mobile-theme-btn .icon-moon{flex-shrink: 0; color: var(--text-2)}
[data-theme="dark"] .mobile-theme-btn .icon-sun{display:block}
[data-theme="dark"] .mobile-theme-btn .icon-moon{display:none}
:root .mobile-theme-btn .icon-moon{display:none}
:root .mobile-theme-btn .icon-sun{display:block}
[data-theme="dark"] .mobile-theme-btn .icon-sun{display:block}
[data-theme="dark"] .mobile-theme-btn .icon-moon{display:none}

/* ── Responsive ────────────────────────────────────── */
@media(max-width:900px){
  .how-grid{grid-template-columns: 1fr}
  .palette-grid{grid-template-columns: repeat(2, 1fr); gap: 12px}
  .mood-grid{grid-template-columns: repeat(4, 1fr)}
}
@media(max-width:640px){
  .container{padding: 0 16px}

  /* Nav mobile */
  .nav{height: 52px}
  .mobile-menu{padding-top: 52px}
  .nav-links{display: none}
  .nav-search{display: none}
  .burger{display: flex}
  .mobile-menu{display: block}

  /* Hero */
  .home-hero{padding: 64px 0 52px}
  .home-h1{font-size: 2.2rem; letter-spacing: -.03em}
  .home-sub{font-size: .88rem}
  .hero-circles .hero-circle{width: 34px; height: 34px}
  .home-search-wrap{border-radius: var(--r-lg)}
  .home-search-wrap input{padding: 14px 16px; font-size: .88rem}
  .home-search-wrap button{padding: 9px 18px; font-size: .8rem}

  /* Grids */
  .palette-grid{grid-template-columns: 1fr}
  .tips-grid{grid-template-columns: 1fr}
  .use-grid{grid-template-columns: repeat(2, 1fr)}
  .explore-grid{grid-template-columns: repeat(3, 1fr)}
  .mood-grid{grid-template-columns: repeat(2, 1fr)}

  /* Color page hero */
  .color-hero{padding: 48px 0 40px}
  .hero-title{font-size: 1.9rem}
  .breadcrumb{padding: 8px 0}

  /* Sections */
  .mood-section,
  .trending-section,
  .how-section{padding: 52px 0}
  .palette-section{padding: 44px 0}
  .use-section{padding: 44px 0}
  .tips-section{padding: 44px 0}
  .sec-title{font-size: 1.3rem}

  /* Card */
  .pair-swatch{height: 140px}
  .pair-body{padding: 12px 14px 14px}
  .pair-name{font-size: .8rem}

  /* Random + Colors pages */
  .clr-hero, .rnd-hero{padding: 52px 0 40px}
  .clr-hero-title, .rnd-title{font-size: 1.9rem}
}
@media(max-width:400px){
  .explore-grid{grid-template-columns: repeat(2, 1fr)}
  .use-grid{grid-template-columns: 1fr}
  .mood-grid{grid-template-columns: repeat(2, 1fr)}
}

/* ── Print ─────────────────────────────────────────── */
@media print{
  .nav,.footer,.toast,.hero-copy-btn,.pair-half-label,.theme-toggle{display:none}
  .pair-swatch{print-color-adjust:exact;-webkit-print-color-adjust:exact}
  .color-hero{print-color-adjust:exact;-webkit-print-color-adjust:exact}
}

/* ── Color Directory (100 Swatches) ────────────────── */
.clr-hero{
  padding: 72px 0 52px;
  text-align: center;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: relative;
}
.clr-hero::before{
  content: '';
  position: absolute;
  top: -200px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(102,126,234,.06) 0%, transparent 60%);
  pointer-events: none;
}
.clr-hero-title{
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 900; letter-spacing: -.04em; line-height: 1.05;
  color: var(--text); margin-bottom: 12px;
  position: relative;
}
.clr-hero-sub{font-size: .9rem; color: var(--text-2); position: relative}
.clr-grid-section{padding: 56px 0 80px}
.clr-swatch-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(135px, 1fr));
  gap: 10px;
}
.clr-swatch{
  display: flex; flex-direction: column;
  justify-content: flex-end;
  padding: 14px 14px 12px;
  height: 100px;
  border-radius: var(--r-lg);
  position: relative; overflow: hidden;
  transition: all .3s var(--ease);
  border: 1px solid rgba(0,0,0,.06);
}
.clr-swatch:hover{
  transform: translateY(-4px) scale(1.03);
  box-shadow: var(--shadow-lg);
  z-index: 2;
}
.clr-swatch-name{font-size: .78rem; font-weight: 700; line-height: 1.2}
.clr-swatch-hex{font-family: var(--mono); font-size: .6rem; font-weight: 500; opacity: .6; margin-top: 2px}
@media(max-width:640px){
  .clr-swatch-grid{grid-template-columns: repeat(3, 1fr)}
  .clr-swatch{height: 90px}
}
@media(max-width:400px){
  .clr-swatch-grid{grid-template-columns: repeat(2, 1fr)}
}

/* ── Random Page ──────────────────────────────────── */
.rnd-hero{
  padding: 72px 0 52px;
  text-align: center;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: relative;
}
.rnd-hero::before{
  content: '';
  position: absolute;
  top: -200px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(245,87,108,.06) 0%, rgba(240,147,251,.04) 40%, transparent 60%);
  pointer-events: none;
}
.rnd-title{
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 900; letter-spacing: -.04em; line-height: 1.05;
  color: var(--text); margin-bottom: 12px;
  position: relative;
}
.rnd-sub{font-size: .9rem; color: var(--text-2); margin-bottom: 28px; position: relative}
.rnd-refresh-btn{
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  font-family: var(--font); font-size: .84rem; font-weight: 600;
  transition: all .25s var(--ease);
  position: relative;
}
.rnd-refresh-btn:hover{
  background: var(--accent); color: var(--bg);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.rnd-refresh-btn svg{transition: transform .4s var(--ease)}
.rnd-refresh-btn:hover svg{transform: rotate(180deg)}
.rnd-section{padding-top: 44px}
.rnd-card{animation: cardIn .5s var(--ease-out) both}