/* ============================================================
   HOLA! 스페인어 기초강좌 — Normal Version (Basic_spain)
   Project Sophia Design System / 발렌티노 1:1 과외
   ============================================================ */

/* ---------- Fonts (오프라인 내장 · assets/fonts/) ---------- */
@font-face {
  font-family: 'Pretendard';
  font-weight: 45 920;
  font-style: normal;
  font-display: swap;
  src: url('fonts/PretendardVariable.woff2') format('woff2-variations');
}
@font-face {
  font-family: 'Inter';
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  src: url('fonts/InterVariable.woff2') format('woff2-variations');
}
@font-face {
  font-family: 'Playfair Display';
  font-weight: 400 900;
  font-style: normal;
  font-display: swap;
  src: url('fonts/PlayfairDisplay.woff2') format('woff2-variations');
}

/* ---------- Design Tokens ---------- */
:root {
  /* Common */
  --dark: #121212;
  --bg-2: #0d130e;
  --card-bg: rgba(31, 40, 35, 0.45);
  --text-main: #E0E0E0;
  --text-bright: #ffffff;
  --text-muted: #8b9a8e;

  /* 🟢 Normal Theme (Romantic & Stable) */
  --primary: #2E7D32;
  --primary-light: #66bb6a;
  --primary-soft: rgba(46, 125, 50, 0.14);
  --badge-bg: #E8F5E9;
  --badge-text: #1B5E20;
  --accent-gold: #c8a24a;

  /* Glassmorphism */
  --glass-bg: rgba(20, 26, 21, 0.65);
  --glass-border: rgba(255, 255, 255, 0.10);
  --glass-shadow: 0 15px 35px 0 rgba(0, 0, 0, 0.5);
  --glass-blur: blur(16px) saturate(180%);

  /* Fonts */
  --font-ko: 'Pretendard', 'Pretendard Variable', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-es: 'Inter', 'Pretendard', sans-serif;
  --font-display: 'Playfair Display', serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-ko);
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(46,125,50,0.16), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(102,187,106,0.08), transparent 55%),
    var(--dark);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
  letter-spacing: -0.1px;
}

.es { font-family: var(--font-es); }

/* ============================================================
   HEADER / HERO
   ============================================================ */
header.hero {
  position: relative;
  text-align: center;
  padding: clamp(48px, 9vw, 96px) 20px clamp(36px, 6vw, 64px);
  border-bottom: 1px solid var(--glass-border);
  background: linear-gradient(160deg, #0b0f0c 0%, #0f1a11 100%);
  overflow: hidden;
}
header.hero::after {
  content: "";
  position: absolute; inset: auto 0 -1px 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--badge-bg);
  color: var(--badge-text);
  font-size: 0.78rem;
  font-weight: 800;
  padding: 5px 14px;
  border-radius: 99px;
  margin-bottom: 18px;
  box-shadow: 0 0 18px rgba(46, 125, 50, 0.35);
}

header.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 5.5vw, 3.6rem);
  font-weight: 900;
  letter-spacing: -1px;
  color: var(--text-bright);
  line-height: 1.15;
}
header.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--primary-light), var(--accent-gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
header.hero .subtitle {
  margin-top: 14px;
  color: var(--text-muted);
  font-size: clamp(0.95rem, 2.2vw, 1.1rem);
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(28px, 5vw, 56px) 20px 120px;
}

section.block {
  margin-bottom: clamp(36px, 6vw, 60px);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  font-weight: 800;
  color: var(--text-bright);
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}
.section-title .ico {
  font-size: 1.3em;
  filter: drop-shadow(0 0 8px rgba(46,125,50,0.5));
}
.section-title small {
  display: block;
  font-size: 0.62em;
  font-weight: 600;
  color: var(--primary-light);
  letter-spacing: 0.5px;
}

/* ============================================================
   발렌티노 강사 말풍선 (Speech Bubble)
   ============================================================ */
.valentino {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin: 22px 0;
}
.valentino .avatar {
  flex: 0 0 54px;
  width: 54px; height: 54px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.7rem;
  background: linear-gradient(145deg, var(--primary), #1b5e20);
  box-shadow: 0 6px 18px rgba(46,125,50,0.45), inset 0 0 0 2px rgba(255,255,255,0.15);
}
.valentino .bubble {
  position: relative;
  flex: 1;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--primary);
  border-radius: 4px 16px 16px 16px;
  padding: 16px 20px;
  box-shadow: var(--glass-shadow);
}
.valentino .bubble::before {
  content: "발렌티노";
  position: absolute;
  top: -10px; left: 14px;
  font-size: 0.68rem;
  font-weight: 800;
  color: var(--primary-light);
  background: var(--dark);
  padding: 1px 8px;
  border-radius: 99px;
  letter-spacing: 0.5px;
}
.valentino .bubble p { margin: 0; }
.valentino .bubble p + p { margin-top: 10px; }
.valentino strong { color: var(--primary-light); font-weight: 700; }

/* ============================================================
   예문 카드 (스페인어 / 한국어 2단)
   ============================================================ */
.examples {
  display: grid;
  gap: 12px;
  margin: 18px 0;
}
.ex-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 16px 18px;
  transition: transform 0.3s cubic-bezier(0.4,0,0.2,1), border-color 0.3s, box-shadow 0.3s;
}
.ex-card:hover {
  transform: translateY(-3px);
  border-color: rgba(102,187,106,0.45);
  box-shadow: 0 14px 30px rgba(0,0,0,0.4);
}
.ex-card .es-line {
  font-family: var(--font-es);
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--text-bright);
}
.ex-card .es-line b { color: var(--primary-light); font-weight: 800; }
.ex-card .ko-line {
  font-size: 0.96rem;
  color: var(--text-muted);
}
.ex-card .note {
  margin-top: 4px;
  font-size: 0.86rem;
  color: var(--accent-gold);
  border-top: 1px dashed rgba(255,255,255,0.08);
  padding-top: 8px;
}

/* ============================================================
   ¡Ojo! 유의사항 박스 / 꿀팁 박스
   ============================================================ */
.callout {
  position: relative;
  background: var(--primary-soft);
  border: 1px solid rgba(102,187,106,0.3);
  border-radius: 14px;
  padding: 18px 20px 18px 22px;
  margin: 18px 0;
}
.callout.warn {
  background: rgba(200, 162, 74, 0.10);
  border-color: rgba(200,162,74,0.35);
}
.callout .label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 800;
  font-size: 0.85rem;
  margin-bottom: 8px;
  color: var(--primary-light);
}
.callout.warn .label { color: var(--accent-gold); }
.callout p { margin: 0; font-size: 0.96rem; }
.callout .es { color: var(--text-bright); font-weight: 600; }

/* ============================================================
   문법 표 (보조용)
   ============================================================ */
.grammar-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.94rem;
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
}
.grammar-table th, .grammar-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--glass-border);
}
.grammar-table thead th {
  background: rgba(46,125,50,0.25);
  color: var(--text-bright);
  font-weight: 700;
}
.grammar-table tbody tr:hover { background: rgba(255,255,255,0.03); }
.grammar-table td.es, .grammar-table th.es {
  font-family: var(--font-es);
  color: var(--text-bright);
  font-weight: 600;
}
.grammar-table b { color: var(--primary-light); }

/* ============================================================
   정리 박스
   ============================================================ */
.summary {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-top: 3px solid var(--primary);
  border-radius: 16px;
  padding: 24px 26px;
  box-shadow: var(--glass-shadow);
}
.summary ul { list-style: none; }
.summary li {
  position: relative;
  padding-left: 26px;
  margin: 10px 0;
  font-size: 0.98rem;
}
.summary li::before {
  content: "✓";
  position: absolute; left: 0; top: 0;
  color: var(--primary-light);
  font-weight: 900;
}
.summary li b { color: var(--primary-light); }

/* ============================================================
   차시 간 네비게이션
   ============================================================ */
.lesson-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 50px;
  flex-wrap: wrap;
}
.lesson-nav a {
  flex: 1 1 200px;
  text-decoration: none;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 16px 20px;
  color: var(--text-main);
  transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}
.lesson-nav a:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: 0 14px 30px rgba(0,0,0,0.4);
}
.lesson-nav a.next { text-align: right; }
.lesson-nav a span {
  display: block;
  font-size: 0.74rem;
  color: var(--text-muted);
  font-weight: 600;
}
.lesson-nav a strong {
  display: block;
  margin-top: 4px;
  color: var(--text-bright);
  font-size: 1rem;
}
.lesson-nav a.disabled { opacity: 0.35; pointer-events: none; }
.home-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 24px 0 0;
  color: var(--primary-light);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
}
.home-link:hover { text-decoration: underline; }

/* Top sticky bar */
.topbar {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px;
  background: rgba(13, 19, 14, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
}
.topbar .brand {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-bright);
  text-decoration: none;
  font-size: 1.05rem;
}
.topbar .brand em { color: var(--primary-light); font-style: normal; }
.topbar .lesson-tag {
  font-size: 0.8rem; font-weight: 700;
  color: var(--primary-light);
  background: var(--primary-soft);
  padding: 4px 12px; border-radius: 99px;
}

/* ============================================================
   허브(index) 전용
   ============================================================ */
.intro-card {
  display: flex;
  gap: 20px;
  align-items: center;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 24px;
  margin-bottom: 40px;
  box-shadow: var(--glass-shadow);
}
.intro-card .big-avatar {
  flex: 0 0 84px;
  width: 84px; height: 84px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 2.6rem;
  background: linear-gradient(145deg, var(--primary), #1b5e20);
  box-shadow: 0 8px 22px rgba(46,125,50,0.5), inset 0 0 0 2px rgba(255,255,255,0.15);
}
.intro-card h2 { color: var(--text-bright); font-size: 1.25rem; margin-bottom: 6px; }
.intro-card p { color: var(--text-muted); font-size: 0.94rem; }
.intro-card .es { color: var(--primary-light); font-weight: 600; }

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px;
}
.lesson-grid a {
  text-decoration: none;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 20px;
  color: var(--text-main);
  transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
}
.lesson-grid a::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(46,125,50,0.0), rgba(46,125,50,0.12));
  opacity: 0; transition: opacity 0.35s;
}
.lesson-grid a:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: 0 18px 38px rgba(0,0,0,0.45); }
.lesson-grid a:hover::before { opacity: 1; }
.lesson-grid .num {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 900;
  color: var(--primary-light);
  line-height: 1;
}
.lesson-grid .l-title { font-weight: 800; color: var(--text-bright); font-size: 1.05rem; }
.lesson-grid .l-desc { font-size: 0.84rem; color: var(--text-muted); }

/* ============================================================
   Entrance animation
   ============================================================ */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.4,0,0.2,1); }
.reveal.in { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; transition: none !important; }
}

/* ---------- Footer ---------- */
footer.site {
  text-align: center;
  padding: 30px 20px;
  color: var(--text-muted);
  font-size: 0.82rem;
  border-top: 1px solid var(--glass-border);
}