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

:root {
  --black: #0a0a0a;
  --dark: #111111;
  --dark2: #1a1a1a;
  --gray: #2a2a2a;
  --mid: #555555;
  --light: #aaaaaa;
  --white: #f5f5f5;
  --accent: #c8a96e;
  --accent-dark: #a8893e;
  --font-sans: 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', sans-serif;

  --bg: #f5f5f5;
  --text: #111111;
  --text-muted: #555555;
  --card-bg: #fafafa;
  --card-border: #e8e8e8;
  --nav-bg: rgba(10,10,10,0.85);
  --section-dark-bg: #111111;
}

body.light-mode {
  --bg: #f0ece4;
  --text: #1a1a1a;
  --text-muted: #555555;
  --card-bg: #ffffff;
  --card-border: #ddd;
  --nav-bg: rgba(240,236,228,0.92);
  --section-dark-bg: #2a2420;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background 0.3s, color 0.3s;
}

/* ===== NAV ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(200, 169, 110, 0.2);
  transition: background 0.3s;
}

.nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.6rem;
  line-height: 1.2;
}

.nav-logo-main {
  display: flex;
  flex-direction: column;
}

.nav-logo-kr {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.nav-logo-phonetic {
  font-size: 0.6rem;
  color: var(--light);
  letter-spacing: 0.08em;
  opacity: 0.7;
}

.nav-logo-sub {
  font-size: 0.7rem;
  color: var(--light);
  letter-spacing: 0.1em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

.nav-links a {
  color: var(--light);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ctrl-btn {
  background: none;
  border: 1px solid rgba(200,169,110,0.35);
  color: var(--accent);
  font-size: 0.85rem;
  cursor: pointer;
  padding: 0.3rem 0.65rem;
  border-radius: 2rem;
  transition: background 0.2s, color 0.2s;
  line-height: 1.4;
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: 0.05em;
}
.ctrl-btn:hover {
  background: var(--accent);
  color: var(--black);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.4rem;
  cursor: pointer;
}

/* 라이트모드 오버라이드 */
body.light-mode .section-dark { background: var(--section-dark-bg); }
body.light-mode .about-card { background: var(--card-bg); border-color: var(--card-border); }
body.light-mode .about-text p,
body.light-mode .about-card p,
body.light-mode .schedule-note p { color: var(--text-muted); }
body.light-mode .nav-links a { color: #555; }
body.light-mode .nav-links a:hover { color: var(--accent); }
body.light-mode .schedule-card { border-color: var(--card-border); background: var(--card-bg); }
body.light-mode .time-value { color: var(--text); }
body.light-mode .footer { background: #1a1512; }


/* ===== HERO ===== */
.hero {
  position: relative;
  height: 50vh;
  min-height: 300px;
  background: var(--black);
  background-image: url('/iaido01.jpg');
  background-size: cover;
  background-position: center 20%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero::before {
  content: '居合道';
  position: absolute;
  font-size: clamp(12rem, 30vw, 24rem);
  font-weight: 900;
  color: rgba(200, 169, 110, 0.04);
  letter-spacing: -0.05em;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,10,10,0.6) 0%, rgba(10,10,10,0.2) 100%);
}

.hero-content {
  position: relative;
  text-align: center;
  color: var(--white);
  padding: 0 2rem;
}

.hero-label {
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 900;
  line-height: 1;
  margin-bottom: 1.5rem;
  color: var(--white);
}

.hero-title span {
  display: block;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 300;
  color: var(--accent);
  letter-spacing: 0.4em;
  margin-top: 0.5rem;
}

.hero-desc {
  font-size: 1rem;
  color: var(--light);
  margin-bottom: 2.5rem;
  letter-spacing: 0.05em;
}

.btn-primary {
  display: inline-block;
  padding: 0.9rem 2.5rem;
  background: var(--accent);
  color: var(--black);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  transition: background 0.2s, transform 0.2s;
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
}

/* ===== SECTIONS ===== */
.section {
  padding: 100px 0;
}

.section-dark {
  background: var(--dark);
  color: var(--white);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

.section-dark .section-title {
  color: var(--white);
}

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--mid);
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.about-cards {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.about-card {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.5rem;
  border: 1px solid #e8e8e8;
  background: #fafafa;
  transition: border-color 0.2s;
}

.about-card:hover {
  border-color: var(--accent);
}

.about-card-icon {
  font-size: 1.8rem;
  color: var(--accent);
  font-weight: 900;
  line-height: 1;
  min-width: 2rem;
}

.about-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
  letter-spacing: 0.02em;
}

.about-card p {
  font-size: 0.85rem;
  color: var(--mid);
}

/* ===== RYUHA ===== */
.ryuha-desc {
  color: var(--light);
  font-size: 0.95rem;
  max-width: 700px;
  margin-bottom: 3rem;
  line-height: 1.9;
}

.ryuha-stats {
  display: flex;
  gap: 4rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.stat-num {
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
}

.stat-plus {
  font-size: 1.5rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--light);
  letter-spacing: 0.1em;
}

/* ===== SCHEDULE ===== */
.schedule-card {
  border: 1px solid #e0e0e0;
  padding: 3rem;
  max-width: 640px;
}

.day-badge {
  display: inline-block;
  background: var(--accent);
  color: var(--black);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.4rem 1rem;
  margin-bottom: 2rem;
}

.time-block {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.time-icon {
  font-size: 2rem;
}

.time-label {
  font-size: 0.8rem;
  color: var(--mid);
  letter-spacing: 0.1em;
  margin-bottom: 0.2rem;
}

.time-value {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.schedule-note p {
  font-size: 0.82rem;
  color: var(--mid);
  margin-bottom: 0.3rem;
}

/* ===== CONTACT ===== */
.contact-desc {
  color: var(--light);
  font-size: 0.95rem;
  margin-bottom: 3rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.contact-item {
  padding: 2rem 1.5rem;
  border: 1px solid rgba(200, 169, 110, 0.25);
  transition: border-color 0.2s;
}

.contact-item:hover {
  border-color: var(--accent);
}

.contact-icon {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 1rem;
}

.contact-label {
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-bottom: 0.4rem;
}

.contact-value {
  font-size: 0.9rem;
  color: var(--light);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--black);
  padding: 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--mid);
  letter-spacing: 0.05em;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: block;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .ryuha-stats {
    gap: 2rem;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .schedule-card {
    padding: 2rem 1.5rem;
  }
}