/* ═══════════════════════════════════════════════════════════════════
   京都 KYOTO DESIGN SYSTEM — NihongoPro Premium Platform
   Modern Kyoto Learning Platform · Japanese Educational Excellence
   Version 1.0 · Inspired by Kyoto temples, washi paper & shoji screens
   ═══════════════════════════════════════════════════════════════════ */

/* ── GOOGLE FONTS — Japanese + Modern ── */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@300;400;500;600;700;900&family=Noto+Sans+JP:wght@300;400;500;700&family=Shippori+Mincho+B1:wght@400;500;600;700;800&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600;9..40,700&display=swap');

/* ══════════════════════════════════════
   KYOTO COLOR TOKENS
   ══════════════════════════════════════ */
:root {
  /* ── Core Kyoto Palette ── */
  --kyoto-cream:      #F8F3E9;
  --kyoto-cream-deep: #F0E8D8;
  --kyoto-brown:      #6B4F3A;
  --kyoto-brown-soft: #8B6E56;
  --kyoto-brown-pale: #F5EDE0;
  --matcha:           #5B7C5B;
  --matcha-soft:      #7A9E7A;
  --matcha-pale:      #EAF2E8;
  --kyoto-red:        #A63A3A;
  --kyoto-red-soft:   #C04444;
  --kyoto-red-pale:   #FAEAEA;
  --gold:             #C89B3C;
  --gold-soft:        #D4AA56;
  --gold-pale:        #FBF4E3;
  --charcoal:         #2D2D2D;
  --charcoal-mid:     #4A4A4A;
  --charcoal-soft:    #6E6E6E;
  --charcoal-faint:   #A0A0A0;
  --washi:            #FAF6EE;
  --shoji-white:      #FEFCF8;

  /* ── Semantic Aliases ── */
  --primary:       var(--kyoto-brown);
  --primary-soft:  var(--kyoto-brown-soft);
  --primary-pale:  var(--kyoto-brown-pale);
  --primary-dark:  #553C2B;
  --accent:        var(--kyoto-red);
  --accent-pale:   var(--kyoto-red-pale);
  --success:       var(--matcha);
  --success-pale:  var(--matcha-pale);

  /* ── Ink Scale ── */
  --ink:       var(--charcoal);
  --ink-mid:   var(--charcoal-mid);
  --ink-soft:  var(--charcoal-soft);
  --ink-faint: var(--charcoal-faint);

  /* ── Surfaces ── */
  --cream:   var(--kyoto-cream);
  --white:   var(--shoji-white);
  --surface: var(--shoji-white);
  --raised:  var(--kyoto-cream-deep);

  /* ── Borders — subtle washi-paper feel ── */
  --border:     rgba(107,79,58,.10);--border-light:rgba(107,79,58,.05);--ink2:var(--charcoal-mid);
  --border-mid: rgba(107,79,58,.18);
  --border-str: rgba(107,79,58,.30);

  /* ── Navigation ── */
  --nav-h:  68px;
  --nav-bg: rgba(248,243,233,.96);

  /* ── Shadows — soft like rice paper ── */
  --shadow-xs: 0 1px 4px rgba(45,45,45,.06), 0 1px 2px rgba(45,45,45,.04);
  --shadow-sm: 0 4px 16px rgba(107,79,58,.08);
  --shadow-md: 0 8px 32px rgba(107,79,58,.12);
  --shadow-lg: 0 20px 60px rgba(107,79,58,.16);

  /* ── Radius — clean, refined ── */
  --r-xs: 3px;
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;
  --r-2xl:28px;

  /* ── Typography ── */
  --font-sans: 'DM Sans', 'Noto Sans JP', system-ui, sans-serif;
  --font-jp:   'Noto Serif JP', 'Shippori Mincho B1', serif;
  --font-jp-sans: 'Noto Sans JP', sans-serif;

  /* ── Motion — deliberate, not hasty ── */
  --ease-out:  cubic-bezier(0.16,1,0.3,1);
  --ease-in:   cubic-bezier(0.4,0,1,1);
  --ease-zen:  cubic-bezier(0.25,0.46,0.45,0.94);
  --t-fast:    140ms;
  --t-med:     260ms;
  --t-slow:    440ms;
  --t-zen:     600ms;

  /* ── JLPT Level Colors ── */
  --n5-color: var(--matcha);
  --n4-color: #4A7FA5;
  --n3-color: var(--gold);
  --n2-color: var(--kyoto-red);
  --n1-color: var(--kyoto-brown);
  --kaigo-color: #5B7C8B;

  /* ── Washi Paper texture vars ── */
  --washi-noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
}

/* ══════════════════════════════════════
   KYOTO DARK MODE — 夜の京都
   ══════════════════════════════════════ */
[data-theme="dark"] {
  --kyoto-cream:      #111111;
  --kyoto-cream-deep: #161616;
  --kyoto-brown-pale: rgba(200,155,60,.10);
  --washi:            #111111;
  --shoji-white:      #1A1A1A;

  --cream:   #111111;
  --white:   #1A1A1A;
  --surface: #1A1A1A;
  --raised:  #222222;

  --ink:       #F5F5F5;
  --ink-mid:   #D0CFC9;
  --ink-soft:  #9A9890;
  --ink-faint: #666460;

  --border:     rgba(200,155,60,.10);
  --border-mid: rgba(200,155,60,.18);
  --border-str: rgba(200,155,60,.28);

  --nav-bg: rgba(17,17,17,.96);

  --primary:      var(--gold);
  --primary-soft: var(--gold-soft);
  --primary-pale: rgba(200,155,60,.12);
  --primary-dark: #A87C28;

  --accent:      var(--gold);
  --accent-pale: rgba(200,155,60,.14);

  --matcha-pale:  rgba(91,124,91,.16);
  --kyoto-red-pale: rgba(166,58,58,.16);
  --gold-pale:    rgba(200,155,60,.14);

  --shadow-xs: 0 1px 4px rgba(0,0,0,.28);
  --shadow-sm: 0 4px 16px rgba(0,0,0,.36);
  --shadow-md: 0 8px 32px rgba(0,0,0,.44);
  --shadow-lg: 0 20px 60px rgba(0,0,0,.52);
}

/* ══════════════════════════════════════
   RESET & BASE
   ══════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--cream);
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
  transition: background var(--t-slow), color var(--t-slow);
}

/* ── Washi paper body texture ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 15% 10%, rgba(200,155,60,.06), transparent 60%),
    radial-gradient(ellipse 60% 80% at 85% 85%, rgba(107,79,58,.05), transparent 60%);
  opacity: 1;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 60px, rgba(107,79,58,.012) 60px, rgba(107,79,58,.012) 61px),
    repeating-linear-gradient(90deg, transparent, transparent 60px, rgba(107,79,58,.008) 60px, rgba(107,79,58,.008) 61px);
}

[data-theme="dark"] body::before {
  background:
    radial-gradient(ellipse 70% 50% at 20% 10%, rgba(200,155,60,.07), transparent 60%),
    radial-gradient(ellipse 50% 70% at 80% 90%, rgba(200,155,60,.04), transparent 60%);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: var(--font-sans); cursor: pointer; }
input, textarea, select { font-family: var(--font-sans); }

/* ══════════════════════════════════════
   KYOTO TYPOGRAPHY SYSTEM
   ══════════════════════════════════════ */

/* Display — Inspired by temple engravings */
.t-display {
  font-family: var(--font-jp);
  font-size: clamp(36px, 7vw, 72px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.t-h1 {
  font-family: var(--font-jp);
  font-size: clamp(28px, 4.5vw, 52px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.t-h2 {
  font-family: var(--font-jp);
  font-size: clamp(22px, 3.2vw, 38px);
  font-weight: 600;
  line-height: 1.2;
}

.t-h3 {
  font-family: var(--font-jp);
  font-size: clamp(18px, 2.5vw, 28px);
  font-weight: 600;
  line-height: 1.3;
}

.t-h4 { font-size: 17px; font-weight: 700; line-height: 1.4; }

.t-body  { font-size: 15px; line-height: 1.8; color: var(--ink-mid); }
.t-small { font-size: 13px; line-height: 1.65; color: var(--ink-soft); }
.t-xs    { font-size: 11px; font-weight: 600; letter-spacing: .05em; color: var(--ink-faint); }

/* Kyoto Label — like temple signage */
.t-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-family: var(--font-sans);
}

.t-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--primary);
  font-family: var(--font-sans);
}

.t-jp      { font-family: var(--font-jp); }
.t-jp-sans { font-family: var(--font-jp-sans); }

/* Japanese vertical text hint */
.t-vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-jp);
}

/* ══════════════════════════════════════
   WASHI PAPER PATTERNS
   ══════════════════════════════════════ */

/* Washi texture overlay */
.washi-texture {
  position: relative;
}
.washi-texture::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: .6;
  mix-blend-mode: multiply;
}
[data-theme="dark"] .washi-texture::after { mix-blend-mode: screen; opacity: .04; }

/* Shoji screen grid pattern */
.shoji-pattern {
  background-image:
    linear-gradient(rgba(107,79,58,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(107,79,58,.06) 1px, transparent 1px);
  background-size: 40px 40px;
}
[data-theme="dark"] .shoji-pattern {
  background-image:
    linear-gradient(rgba(200,155,60,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,155,60,.05) 1px, transparent 1px);
}

/* Washi fiber lines */
.washi-lines {
  background-image:
    repeating-linear-gradient(
      92deg,
      transparent,
      transparent 3px,
      rgba(107,79,58,.03) 3px,
      rgba(107,79,58,.03) 4px
    );
}

/* ══════════════════════════════════════
   JAPANESE DECORATIVE ELEMENTS
   ══════════════════════════════════════ */

/* Kanji watermark — temple gate style */
.kanji-watermark {
  position: absolute;
  font-family: var(--font-jp);
  font-weight: 700;
  color: rgba(107,79,58,.055);
  pointer-events: none;
  user-select: none;
  line-height: 1;
}
[data-theme="dark"] .kanji-watermark {
  color: rgba(200,155,60,.07);
}

/* Horizontal rule — torii gate-inspired */
.kyoto-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 24px 0;
}
.kyoto-divider::before,
.kyoto-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-mid), transparent);
}
.kyoto-divider-mark {
  font-family: var(--font-jp);
  font-size: 16px;
  color: var(--kyoto-brown);
  opacity: .5;
}

/* Corner accent — like shoji frame corners */
.kyoto-corner {
  position: relative;
}
.kyoto-corner::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px;
  width: 24px; height: 24px;
  border-top: 2px solid var(--gold);
  border-left: 2px solid var(--gold);
  border-radius: var(--r-xs) 0 0 0;
  pointer-events: none;
}

/* Red torii accent line */
.torii-accent {
  position: relative;
}
.torii-accent::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--kyoto-red), var(--gold), var(--kyoto-red));
  border-radius: var(--r-lg) var(--r-lg) 0 0;
}

/* Gold accent dot — wabi-sabi style */
.kyoto-dot::before {
  content: '◆';
  color: var(--gold);
  font-size: 8px;
  margin-right: 6px;
  vertical-align: middle;
}

/* ══════════════════════════════════════
   LAYOUT
   ══════════════════════════════════════ */
.container  { max-width: 1200px; margin: 0 auto; padding: 0 clamp(16px, 5vw, 64px); position: relative; z-index: 1; }
.container-sm { max-width: 860px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 48px); position: relative; z-index: 1; }
.section    { padding: clamp(52px, 8vw, 100px) 0; position: relative; }
.section-sm { padding: clamp(32px, 5vw, 60px) 0; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
@media(max-width:900px){ .grid-3{grid-template-columns:1fr 1fr} .grid-4{grid-template-columns:1fr 1fr} }
@media(max-width:640px){ .grid-2,.grid-3,.grid-4{grid-template-columns:1fr} }

.flex     { display: flex; align-items: center; }
.flex-col { display: flex; flex-direction: column; }
.gap-xs   { gap: 4px; }
.gap-sm   { gap: 8px; }
.gap-md   { gap: 16px; }
.gap-lg   { gap: 24px; }
.gap-xl   { gap: 40px; }

/* ══════════════════════════════════════
   NAVIGATION — 門 GATE
   ══════════════════════════════════════ */
.nav {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(16px, 4vw, 56px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 200;
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  transition: background var(--t-slow);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.nav-brand-jp {
  font-family: var(--font-jp);
  font-size: 22px;
  font-weight: 700;
  color: var(--kyoto-brown);
  letter-spacing: -0.01em;
}
[data-theme="dark"] .nav-brand-jp { color: var(--gold); }

.nav-brand-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--r-sm);
  background: var(--primary-pale);
  color: var(--primary);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.nav-links { display: flex; align-items: center; gap: 2px; list-style: none; }
.nav-links a {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 13px;
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  transition: all var(--t-fast);
  letter-spacing: .01em;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  background: var(--primary-pale);
}
[data-theme="dark"] .nav-links a:hover,
[data-theme="dark"] .nav-links a.active {
  color: var(--gold);
  background: rgba(200,155,60,.12);
}

.nav-actions { display: flex; align-items: center; gap: 8px; }

/* Theme toggle */
.theme-toggle {
  width: 36px; height: 36px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-mid);
  background: var(--white);
  color: var(--ink-soft);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  transition: all var(--t-fast);
  cursor: pointer;
}
.theme-toggle:hover { background: var(--primary-pale); color: var(--primary); border-color: var(--border-str); }

/* ══════════════════════════════════════
   BUTTONS — 印 SEAL INSPIRED
   ══════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 22px;
  border-radius: var(--r-md);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  border: 1.5px solid transparent;
  transition: all var(--t-fast) var(--ease-zen);
  cursor: pointer;
  white-space: nowrap;
  letter-spacing: .01em;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--t-fast);
  border-radius: inherit;
  pointer-events: none;
}
.btn:hover::after { background: rgba(255,255,255,.06); }

.btn-sm  { height: 34px; padding: 0 14px; font-size: 12px; border-radius: var(--r-sm); font-weight: 700; }
.btn-lg  { height: 52px; padding: 0 28px; font-size: 15px; border-radius: var(--r-lg); }
.btn-xl  { height: 60px; padding: 0 36px; font-size: 16px; border-radius: var(--r-xl); }

/* Primary — Kyoto Brown */
.btn-primary {
  background: var(--kyoto-brown);
  color: #fff;
  border-color: var(--kyoto-brown);
  box-shadow: 0 4px 16px rgba(107,79,58,.28);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(107,79,58,.36);
}
.btn-primary:active { transform: translateY(0); }

/* Accent — Kyoto Red */
.btn-accent {
  background: var(--kyoto-red);
  color: #fff;
  border-color: var(--kyoto-red);
  box-shadow: 0 4px 16px rgba(166,58,58,.28);
}
.btn-accent:hover {
  background: var(--kyoto-red-soft);
  border-color: var(--kyoto-red-soft);
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(166,58,58,.36);
}

/* Gold */
.btn-gold {
  background: var(--gold);
  color: #1A1209;
  border-color: var(--gold);
  box-shadow: 0 4px 16px rgba(200,155,60,.30);
}
.btn-gold:hover {
  background: var(--gold-soft);
  border-color: var(--gold-soft);
  transform: translateY(-1px);
}

/* Outline */
.btn-outline {
  background: transparent;
  border-color: var(--border-mid);
  color: var(--ink-mid);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-pale);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--ink-soft);
}
.btn-ghost:hover { color: var(--primary); background: var(--primary-pale); }

/* Matcha */
.btn-matcha {
  background: var(--matcha);
  color: #fff;
  border-color: var(--matcha);
}
.btn-matcha:hover { background: var(--matcha-soft); transform: translateY(-1px); }

/* Dark hero button */
.btn-hero {
  background: var(--kyoto-cream);
  color: var(--kyoto-brown);
  border-color: rgba(248,243,233,.3);
  font-weight: 700;
}
.btn-hero:hover { background: white; }

/* ══════════════════════════════════════
   CARDS — 間 MA (SPACE)
   ══════════════════════════════════════ */
.card {
  background: var(--white);
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
  position: relative;
  overflow: hidden;
  transition: all var(--t-med) var(--ease-out);
}

.card-hover:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-mid);
}

/* Washi card — primary card style */
.card-washi {
  background: var(--washi);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-xs);
}

/* Ink card — dark hero panels */
.card-ink {
  background: var(--charcoal);
  color: #F5F5F5;
  border-radius: var(--r-xl);
  border: 1px solid rgba(255,255,255,.08);
  position: relative;
  overflow: hidden;
}
[data-theme="dark"] .card-ink {
  background: #1A1A1A;
  border-color: rgba(200,155,60,.12);
}

/* Gold accent card */
.card-gold {
  border-top: 3px solid var(--gold);
}

/* Matcha accent card */
.card-matcha {
  border-top: 3px solid var(--matcha);
}

/* Red accent card */
.card-kyoto {
  border-top: 3px solid var(--kyoto-red);
}

/* ══════════════════════════════════════
   BADGES & PILLS
   ══════════════════════════════════════ */
.badge {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 9px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
}

.badge-brown   { background: var(--kyoto-brown-pale);  color: var(--kyoto-brown); }
.badge-red     { background: var(--kyoto-red-pale);    color: var(--kyoto-red); }
.badge-matcha  { background: var(--matcha-pale);       color: var(--matcha); }
.badge-gold    { background: var(--gold-pale);         color: #8B6A1C; }
.badge-ink     { background: var(--charcoal);          color: #F5F5F5; }

/* JLPT Level Badges */
.badge-n5    { background: rgba(91,124,91,.14); color: var(--matcha); }
.badge-n4    { background: rgba(74,127,165,.14); color: #2A5F8A; }
.badge-n3    { background: rgba(200,155,60,.14); color: #8B6A1C; }
.badge-n2    { background: rgba(166,58,58,.14);  color: var(--kyoto-red); }
.badge-n1    { background: rgba(107,79,58,.14);  color: var(--kyoto-brown); }
.badge-kaigo { background: rgba(91,124,139,.14); color: #3A6B7C; }

/* ══════════════════════════════════════
   PROGRESS BARS
   ══════════════════════════════════════ */
.progress-track {
  height: 6px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 99px;
  transition: width var(--t-zen) var(--ease-out);
}
.progress-sm .progress-track { height: 4px; }
.progress-lg .progress-track { height: 10px; }

/* Kyoto progress — gradient fill */
.progress-kyoto .progress-fill {
  background: linear-gradient(90deg, var(--kyoto-brown), var(--gold));
}
.progress-matcha .progress-fill {
  background: linear-gradient(90deg, var(--matcha), var(--matcha-soft));
}
.progress-red .progress-fill {
  background: linear-gradient(90deg, var(--kyoto-red), var(--gold));
}

/* ══════════════════════════════════════
   INPUTS — 書 WRITING INSPIRED
   ══════════════════════════════════════ */
.input {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border: 1.5px solid var(--border-mid);
  border-radius: var(--r-md);
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 14px;
  transition: all var(--t-fast);
  outline: none;
}
.input:focus {
  border-color: var(--kyoto-brown);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(107,79,58,.12);
}
.input::placeholder { color: var(--ink-faint); }
.input-jp {
  font-family: var(--font-jp);
  font-size: 16px;
}

/* ══════════════════════════════════════
   QUIZ OPTIONS
   ══════════════════════════════════════ */
.quiz-opt {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  padding: 14px 18px;
  border-radius: var(--r-md);
  border: 2px solid var(--border);
  background: var(--white);
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  transition: all var(--t-fast);
  font-family: var(--font-sans);
}
.quiz-opt:hover:not(.disabled) {
  border-color: var(--kyoto-brown);
  background: var(--kyoto-brown-pale);
}
.quiz-opt.selected  { border-color: var(--kyoto-brown); background: var(--kyoto-brown-pale); }
.quiz-opt.correct   { border-color: var(--matcha);      background: var(--matcha-pale); }
.quiz-opt.incorrect { border-color: var(--kyoto-red);   background: var(--kyoto-red-pale); }
.quiz-opt.disabled  { cursor: default; }

.quiz-opt-key {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--cream);
  border: 1.5px solid var(--border-mid);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 800;
  flex-shrink: 0;
  font-family: var(--font-sans);
}

/* ══════════════════════════════════════
   FLIP CARD
   ══════════════════════════════════════ */
.flip-card  { perspective: 1000px; }
.flip-inner {
  transform-style: preserve-3d;
  transition: transform .6s var(--ease-out);
  position: relative;
}
.flip-inner.flipped { transform: rotateY(180deg); }
.flip-front, .flip-back { backface-visibility: hidden; -webkit-backface-visibility: hidden; }
.flip-back  { transform: rotateY(180deg); }

/* ══════════════════════════════════════
   XP / GAMIFICATION
   ══════════════════════════════════════ */
.xp-bar { height: 8px; background: var(--border); border-radius: 99px; overflow: hidden; }
.xp-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--kyoto-brown), var(--gold));
  border-radius: 99px;
  transition: width 1.2s var(--ease-out);
}

.streak-fire {
  font-size: 22px;
  animation: kyoto-flicker 2s ease-in-out infinite alternate;
}
@keyframes kyoto-flicker {
  from { filter: brightness(1); }
  to   { filter: brightness(1.15) drop-shadow(0 0 5px rgba(200,155,60,.6)); }
}

/* ══════════════════════════════════════
   SKELETON
   ══════════════════════════════════════ */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--border) 25%,
    var(--raised) 50%,
    var(--border) 75%
  );
  background-size: 400% 100%;
  animation: kyoto-shimmer 1.8s ease-in-out infinite;
  border-radius: var(--r-sm);
}
@keyframes kyoto-shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}

/* ══════════════════════════════════════
   TOAST NOTIFICATIONS
   ══════════════════════════════════════ */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--r-md);
  background: var(--charcoal);
  color: white;
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-md);
  pointer-events: all;
  cursor: pointer;
  opacity: 0;
  transform: translateX(100%);
  transition: all var(--t-med) var(--ease-out);
}
.toast.show   { opacity: 1; transform: translateX(0); }
.toast.success { background: var(--matcha); }
.toast.error   { background: var(--kyoto-red); }
.toast.gold    { background: var(--gold); color: var(--charcoal); }

/* ══════════════════════════════════════
   MODAL
   ══════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(45,45,45,.55);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-med);
}
.modal-overlay.open { opacity: 1; pointer-events: all; }

.modal-box {
  background: var(--white);
  border-radius: var(--r-xl);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: scale(.95) translateY(12px);
  transition: transform var(--t-med) var(--ease-out);
}
.modal-overlay.open .modal-box { transform: scale(1) translateY(0); }

/* ══════════════════════════════════════
   MOBILE NAVIGATION
   ══════════════════════════════════════ */
.mobile-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--nav-bg);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: none;
  grid-template-columns: repeat(5, 1fr);
  padding: 6px 0 max(6px, env(safe-area-inset-bottom));
}
@media(max-width:700px) {
  .mobile-nav { display: grid; }
  body { padding-bottom: 68px; }
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 6px 4px;
  border: none;
  background: none;
  font-size: 10px;
  font-weight: 700;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color var(--t-fast);
  letter-spacing: .02em;
}
.mobile-nav-item .icon { font-size: 22px; line-height: 1; }
.mobile-nav-item.active,
.mobile-nav-item:hover { color: var(--primary); }
[data-theme="dark"] .mobile-nav-item.active,
[data-theme="dark"] .mobile-nav-item:hover { color: var(--gold); }

/* ══════════════════════════════════════
   FOCUS & ACCESSIBILITY
   ══════════════════════════════════════ */
:focus-visible {
  outline: 2px solid var(--kyoto-brown);
  outline-offset: 3px;
  border-radius: 4px;
}
[data-theme="dark"] :focus-visible { outline-color: var(--gold); }

/* Skip to content */
.skip-to-content {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  background: var(--kyoto-brown);
  color: #fff;
  padding: .5rem 1rem;
  border-radius: 0 0 var(--r-md) var(--r-md);
  font-weight: 700;
  font-size: 13px;
  text-decoration: none;
  transition: top var(--t-fast);
}
.skip-to-content:focus { top: 0; }

/* ══════════════════════════════════════
   SCROLLBAR
   ══════════════════════════════════════ */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-mid); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--kyoto-brown-soft); }

/* ══════════════════════════════════════
   UTILITIES
   ══════════════════════════════════════ */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.font-jp     { font-family: var(--font-jp); }
.font-mono   { font-family: monospace; }
.truncate    { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sr-only     { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.hidden      { display: none !important; }
.visible     { display: block !important; }
.pointer     { cursor: pointer; }
.no-select   { user-select: none; }
.z-1         { position: relative; z-index: 1; }

/* Kyoto color utilities */
.text-brown  { color: var(--kyoto-brown); }
.text-red    { color: var(--kyoto-red); }
.text-matcha { color: var(--matcha); }
.text-gold   { color: var(--gold); }
.text-ink    { color: var(--ink); }
.text-muted  { color: var(--ink-soft); }

/* ══════════════════════════════════════
   SCREEN SIZE UTILITIES
   ══════════════════════════════════════ */
@media(max-width:700px) {
  .hide-mobile { display: none !important; }
  .nav-links   { display: none !important; }
}
@media(min-width:701px) {
  .hide-desktop { display: none !important; }
}

/* ══════════════════════════════════════
   HERO SECTIONS — 殿 SHRINE STYLE
   ══════════════════════════════════════ */
.hero-kyoto {
  background: var(--charcoal);
  color: #F5F5F5;
  position: relative;
  overflow: hidden;
}
[data-theme="dark"] .hero-kyoto {
  background: #0D0D0D;
}

/* Shrine gate silhouette — subtle */
.hero-kyoto::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 80% at 90% 50%, rgba(200,155,60,.08), transparent 60%),
    radial-gradient(ellipse 50% 60% at 10% 80%, rgba(166,58,58,.07), transparent 50%);
  pointer-events: none;
}

/* Large kanji watermark */
.hero-kyoto .hero-kanji {
  position: absolute;
  right: -2%;
  bottom: -20%;
  font-family: var(--font-jp);
  font-size: clamp(180px, 30vw, 340px);
  font-weight: 900;
  color: rgba(255,255,255,.025);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.05em;
}

/* ══════════════════════════════════════
   SECTION HEADERS — 見出し
   ══════════════════════════════════════ */
.section-header {
  margin-bottom: clamp(28px, 4vw, 48px);
}
.section-header .eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--kyoto-brown);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-header .eyebrow::before {
  content: '';
  width: 20px;
  height: 1px;
  background: var(--kyoto-brown);
  opacity: .5;
}

/* ══════════════════════════════════════
   SPECIAL COMPONENTS
   ══════════════════════════════════════ */

/* Kyoto Progress Ring */
.progress-ring-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.progress-ring-wrap svg { transform: rotate(-90deg); }
.progress-ring-track { fill: none; stroke: var(--border); }
.progress-ring-fill  {
  fill: none;
  stroke: var(--kyoto-brown);
  stroke-linecap: round;
  transition: stroke-dashoffset var(--t-zen) var(--ease-out);
}
.progress-ring-label {
  position: absolute;
  text-align: center;
  font-family: var(--font-jp);
  font-weight: 700;
}

/* Stat cards with kanji accents */
.stat-kyoto {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: all var(--t-med) var(--ease-out);
}
.stat-kyoto::before {
  content: attr(data-kanji);
  position: absolute;
  top: -5px; right: 8px;
  font-family: var(--font-jp);
  font-size: 52px;
  font-weight: 700;
  color: rgba(107,79,58,.07);
  line-height: 1;
  pointer-events: none;
}
[data-theme="dark"] .stat-kyoto::before { color: rgba(200,155,60,.08); }
.stat-kyoto:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }

/* Heatmap cells */
.cal-cell { width: 12px; height: 12px; border-radius: 2px; background: var(--border); transition: transform .1s; }
.cal-cell:hover { transform: scale(1.5); }
.cal-cell.l1 { background: var(--matcha-pale); }
.cal-cell.l2 { background: var(--matcha-soft); }
.cal-cell.l3 { background: var(--matcha); }
.cal-cell.today-mark { background: var(--kyoto-brown) !important; box-shadow: 0 0 0 1.5px var(--kyoto-brown); }
[data-theme="dark"] .cal-cell.today-mark { background: var(--gold) !important; box-shadow: 0 0 0 1.5px var(--gold); }

/* Achievement cards */
.ach-item {
  background: var(--cream);
  border-radius: var(--r-md);
  padding: 14px 10px;
  border: 1px solid var(--border);
  text-align: center;
  transition: all var(--t-med);
  cursor: default;
}
.ach-item.earned {
  border-color: var(--gold);
  background: var(--gold-pale);
  box-shadow: 0 2px 10px rgba(200,155,60,.15);
}
.ach-item.locked { opacity: .35; filter: grayscale(.9); }
.ach-item.earned:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }

/* Leaderboard */
.lb-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.lb-row:last-child { border-bottom: none; }
.lb-rank { font-size: 16px; width: 32px; text-align: center; flex-shrink: 0; }
.lb-name { flex: 1; font-weight: 600; }
.lb-xp   { font-weight: 800; color: var(--gold); flex-shrink: 0; font-size: 12px; }
.lb-you  {
  background: var(--kyoto-brown-pale);
  border-radius: var(--r-sm);
  padding: 8px 12px;
  margin: 2px -4px;
  border: 1px solid rgba(107,79,58,.2);
}
[data-theme="dark"] .lb-you {
  background: rgba(200,155,60,.10);
  border-color: rgba(200,155,60,.2);
}

/* Chat UI */
.chat-bubble {
  padding: 12px 16px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.65;
  max-width: 82%;
}
.chat-bubble.user {
  background: var(--kyoto-brown);
  color: white;
  border-bottom-right-radius: 3px;
  align-self: flex-end;
}
.chat-bubble.ai {
  background: var(--white);
  color: var(--ink);
  border: 1px solid var(--border);
  border-bottom-left-radius: 3px;
  align-self: flex-start;
  box-shadow: var(--shadow-xs);
}
[data-theme="dark"] .chat-bubble.user { background: var(--gold); color: var(--charcoal); }

/* ══════════════════════════════════════
   PREMIUM GRADIENT BANNER
   ══════════════════════════════════════ */
.premium-banner {
  background: linear-gradient(135deg, #1A1209, #2D1F0A, #1A1209);
  border-radius: var(--r-xl);
  border: 1px solid rgba(200,155,60,.25);
  position: relative;
  overflow: hidden;
}
.premium-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 80% 30%, rgba(200,155,60,.12), transparent 60%);
  pointer-events: none;
}

/* ══════════════════════════════════════
   PRICING CARDS
   ══════════════════════════════════════ */
.plan-card {
  background: var(--white);
  border: 2px solid var(--border);
  border-radius: var(--r-xl);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: all var(--t-med) var(--ease-out);
}
.plan-card.featured {
  border-color: var(--gold);
  box-shadow: 0 0 0 1px var(--gold), var(--shadow-md);
}
.plan-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.plan-badge {
  position: absolute;
  top: -1px; right: 24px;
  background: var(--gold);
  color: white;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 0 0 var(--r-md) var(--r-md);
}

/* ══════════════════════════════════════
   FOOTER
   ══════════════════════════════════════ */
footer {
  background: var(--charcoal);
  color: rgba(255,255,255,.7);
  padding: 56px 0 32px;
  position: relative;
  overflow: hidden;
}
footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 40% 60% at 90% 20%, rgba(200,155,60,.07), transparent 50%),
    radial-gradient(ellipse 30% 50% at 10% 80%, rgba(107,79,58,.08), transparent 50%);
  pointer-events: none;
}
[data-theme="dark"] footer { background: #0A0A0A; }

.footer-brand-jp {
  font-family: var(--font-jp);
  font-size: 26px;
  font-weight: 700;
  color: white;
  margin-bottom: 8px;
}
.footer-tagline {
  font-size: 13px;
  color: rgba(255,255,255,.45);
  margin-bottom: 20px;
  line-height: 1.6;
}
.footer-link {
  font-size: 13px;
  color: rgba(255,255,255,.5);
  text-decoration: none;
  display: block;
  padding: 3px 0;
  transition: color var(--t-fast);
}
.footer-link:hover { color: var(--gold); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
@media(max-width:700px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; } }
.footer-divider {
  border: none;
  border-top: 1px solid rgba(255,255,255,.08);
  margin: 0 0 24px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: rgba(255,255,255,.3);
}

/* ══════════════════════════════════════════════════════════════════
   📭 EMPTY STATE — komponen reusable untuk kondisi "belum ada data"
   ══════════════════════════════════════════════════════════════════ */
.empty-state { text-align: center; padding: 48px 24px; max-width: 380px; margin: 0 auto; }
.empty-state-icon { font-size: 48px; margin-bottom: 16px; opacity: .7; }
.empty-state h3 { font-size: 17px; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.empty-state p { font-size: 14px; color: var(--ink-soft); line-height: 1.6; margin-bottom: 20px; }

/* ══════════════════════════════════════════════════════════════════
   ⚠️ ERROR STATE — komponen reusable untuk kondisi gagal/error
   ══════════════════════════════════════════════════════════════════ */
.error-state { text-align: center; padding: 40px 24px; max-width: 380px; margin: 0 auto; background: var(--kyoto-red-pale); border: 1px solid var(--kyoto-red-soft); border-radius: var(--r-lg); }
.error-state-icon { font-size: 40px; margin-bottom: 12px; }
.error-state h3 { font-size: 16px; font-weight: 700; color: var(--kyoto-red); margin-bottom: 6px; }
.error-state p { font-size: 13px; color: var(--ink-soft); line-height: 1.6; margin-bottom: 16px; }

/* ══════════════════════════════════════════════════════════════════
   📐 BREAKPOINT STANDAR — konvensi untuk komponen/halaman baru:
     480px mobile kecil · 640px mobile besar · 900px tablet · 1200px desktop kecil
   Rule lama di atas file ini sengaja tidak diubah (menghindari regresi layout).
   ══════════════════════════════════════════════════════════════════ */

/* Tombol toggle dark mode mengambang — naik di atas bottom-nav pada mobile */
@media (max-width: 768px) {
  .np-dark-toggle-btn { bottom: calc(64px + env(safe-area-inset-bottom, 0px) + 12px) !important; }
}