/* ===================================================
   쿨글라스 (CoolGlass) — 단열필름시공업체
   Design: Teal Green + Amber / Clean & Professional
   =================================================== */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 400; line-height: 1.7; color: #1F2937; background: #FFFFFF; overflow-x: hidden;
}
body.nav-open { overflow: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
address { font-style: normal; }

:root {
  --primary: #0D5C5C; --primary-dark: #094444; --primary-light: #E6F4F3;
  --secondary: #16A8A8; --accent: #F59E0B; --accent-dark: #D97706;
  --dark: #0A1628; --text: #1F2937; --text-muted: #6B7280;
  --bg: #FFFFFF; --bg-alt: #F0F7F7; --bg-dark: #0D1F2D; --border: #D1E8E8;
  --radius: 12px; --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(13,92,92,0.10); --shadow-hover: 0 12px 40px rgba(13,92,92,0.18);
  --transition: 0.28s ease; --container: 1200px; --container-narrow: 820px;
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; top: -40px; left: 6px; background: var(--primary); color: #fff; padding: 8px 16px; border-radius: 4px; font-size: 0.9rem; z-index: 9999; transition: top 0.2s; }
.skip-link:focus { top: 6px; }

.btn-primary, .btn-secondary, .btn-outline, .btn-white, .btn-outline-white {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px; border-radius: 50px; font-size: 1rem; font-weight: 700;
  cursor: pointer; transition: all var(--transition); white-space: nowrap; border: 2px solid transparent;
}
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(13,92,92,0.30); }
.btn-secondary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-secondary:hover { background: var(--accent-dark); border-color: var(--accent-dark); transform: translateY(-2px); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.7); }
.btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; }
.btn-white { background: #fff; color: var(--primary); border-color: #fff; }
.btn-white:hover { background: #f0fdf4; transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-outline-white { background: transparent; color: #fff; border-color: rgba(255,255,255,0.6); }
.btn-outline-white:hover { background: rgba(255,255,255,0.15); border-color: #fff; }

.fade-up { opacity: 0; transform: translateY(28px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

.section-header { text-align: center; margin-bottom: 52px; }
.section-badge { display: inline-block; background: var(--primary-light); color: var(--primary); padding: 6px 18px; border-radius: 50px; font-size: 0.82rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; margin-bottom: 16px; }
.section-title { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; color: var(--dark); line-height: 1.3; margin-bottom: 16px; }
.section-desc { font-size: 1rem; color: var(--text-muted); line-height: 1.8; }
.section-cta { text-align: center; margin-top: 48px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.notice-box { background: #FFFBEB; border: 1px solid #FDE68A; border-radius: var(--radius); padding: 16px 20px; font-size: 0.875rem; color: #92400E; line-height: 1.7; margin-top: 24px; }

/* HEADER */
#site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); border-bottom: 1px solid transparent; transition: border-color var(--transition), box-shadow var(--transition); }
#site-header.scrolled { border-bottom-color: var(--border); box-shadow: 0 2px 20px rgba(0,0,0,0.08); }
.header-inner { display: flex; align-items: center; gap: 32px; height: 72px; }
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-icon { flex-shrink: 0; }
.logo-text-wrap { display: flex; flex-direction: column; }
.logo-main { font-size: 1.3rem; font-weight: 900; color: var(--primary); line-height: 1; }
.logo-sub { font-size: 0.65rem; color: var(--text-muted); font-weight: 500; margin-top: 2px; }
.main-nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.nav-link { padding: 8px 14px; border-radius: 8px; font-size: 0.88rem; font-weight: 500; color: var(--text); transition: background var(--transition), color var(--transition); }
.nav-link:hover { background: var(--primary-light); color: var(--primary); }
.nav-cta { padding: 10px 20px; background: var(--primary); color: #fff; border-radius: 50px; font-size: 0.88rem; font-weight: 700; transition: background var(--transition), transform var(--transition); margin-left: 8px; }
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); }
.nav-toggle { display: none; flex-direction: column; justify-content: space-between; width: 30px; height: 20px; background: none; border: none; cursor: pointer; padding: 0; margin-left: auto; }
.nav-toggle span { display: block; height: 2.5px; background: var(--text); border-radius: 2px; transition: all 0.3s; }

/* HERO */
#hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: 120px 0 80px; overflow: hidden; }
.hero-slides { position: absolute; inset: 0; z-index: 0; }
.hero-slide { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: 0; transition: opacity 1.2s ease; }
.hero-slide.active { opacity: 1; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(10,22,40,0.78) 0%, rgba(13,92,92,0.55) 100%); }
.hero-dots { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 10; }
.hero-dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.4); border: none; cursor: pointer; transition: background 0.3s, transform 0.3s; }
.hero-dot.active { background: var(--accent); transform: scale(1.3); }
#hero .container { position: relative; z-index: 2; width: 100%; }
.hero-content { max-width: 700px; color: #fff; }
.hero-eyebrow { display: inline-block; background: rgba(245,158,11,0.25); color: var(--accent); border: 1px solid rgba(245,158,11,0.4); padding: 6px 18px; border-radius: 50px; font-size: 0.82rem; font-weight: 700; letter-spacing: 0.06em; margin-bottom: 20px; }
.hero-h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 900; line-height: 1.15; margin-bottom: 8px; text-shadow: 0 2px 20px rgba(0,0,0,0.3); }
.hero-brand { font-size: 1.2rem; font-weight: 600; color: var(--accent); margin-bottom: 20px; }
.hero-brand span { font-size: 0.9rem; font-weight: 400; color: rgba(255,255,255,0.7); margin-left: 8px; }
.hero-desc { font-size: 1.05rem; line-height: 1.75; color: rgba(255,255,255,0.9); margin-bottom: 8px; }
.br-pc { display: inline; }
.hero-sub { font-size: 0.9rem; color: rgba(255,255,255,0.65); margin-bottom: 24px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.hero-tag { background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.25); color: rgba(255,255,255,0.9); padding: 6px 16px; border-radius: 50px; font-size: 0.78rem; font-weight: 500; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.2); border-radius: var(--radius); overflow: hidden; max-width: 600px; }
.stat-item { background: rgba(10,22,40,0.5); backdrop-filter: blur(8px); padding: 16px 12px; text-align: center; color: #fff; }
.stat-num { font-size: 1.6rem; font-weight: 900; color: var(--accent); }
.stat-unit { font-size: 0.85rem; font-weight: 600; color: rgba(255,255,255,0.7); }
.stat-label { display: block; font-size: 0.72rem; color: rgba(255,255,255,0.55); margin-top: 2px; }

/* PROBLEMS */
#problems { padding: 100px 0; background: var(--bg-alt); }
.problems-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.problem-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); transition: transform var(--transition), box-shadow var(--transition); }
.problem-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.problem-img { aspect-ratio: 16/9; overflow: hidden; }
.problem-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.problem-card:hover .problem-img img { transform: scale(1.05); }
.problem-body { padding: 24px; }
.problem-tag { display: inline-block; background: var(--primary-light); color: var(--primary); padding: 4px 12px; border-radius: 50px; font-size: 0.75rem; font-weight: 700; margin-bottom: 12px; }
.problem-title { font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 10px; line-height: 1.4; }
.problem-text { font-size: 0.875rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 14px; }
.problem-film { font-size: 0.8rem; color: var(--primary); font-weight: 600; }

/* SERVICES */
#services { padding: 100px 0; background: var(--bg); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card { background: var(--bg); border: 1.5px solid var(--border); border-radius: var(--radius-lg); padding: 32px 28px; transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition); }
.service-card:hover { border-color: var(--secondary); box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.service-icon { margin-bottom: 20px; }
.service-name { font-size: 1.05rem; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
.service-desc { font-size: 0.875rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
.service-list { display: flex; flex-direction: column; gap: 6px; }
.service-list li { font-size: 0.8rem; color: var(--primary); font-weight: 500; padding-left: 16px; position: relative; }
.service-list li::before { content: '✓'; position: absolute; left: 0; color: var(--accent); }

/* WHY */
#why { padding: 100px 0; background: var(--dark); }
#why .section-badge { background: rgba(22,168,168,0.2); color: var(--secondary); }
#why .section-title { color: #fff; }
#why .section-desc { color: rgba(255,255,255,0.6); }
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.why-card { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-lg); padding: 36px 32px; transition: background var(--transition), border-color var(--transition); }
.why-card:hover { background: rgba(22,168,168,0.1); border-color: rgba(22,168,168,0.4); }
.why-num { font-size: 2.5rem; font-weight: 900; color: rgba(245,158,11,0.3); line-height: 1; margin-bottom: 16px; }
.why-title { font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.why-text { font-size: 0.875rem; color: rgba(255,255,255,0.65); line-height: 1.75; }

/* PROCESS */
#process { padding: 100px 0; background: var(--bg-alt); }
.process-steps { display: flex; flex-direction: column; gap: 0; max-width: 820px; margin: 0 auto; }
.process-step { display: flex; gap: 24px; align-items: flex-start; background: #fff; border-radius: var(--radius); padding: 24px 28px; box-shadow: 0 2px 12px rgba(0,0,0,0.05); }
.process-arrow { width: 3px; height: 24px; background: linear-gradient(var(--primary), var(--secondary)); margin-left: 40px; }
.step-circle { flex-shrink: 0; width: 44px; height: 44px; border-radius: 50%; background: var(--primary); color: #fff; font-size: 1.1rem; font-weight: 800; display: flex; align-items: center; justify-content: center; }
.step-body { flex: 1; }
.step-title { font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 4px; }
.step-text { font-size: 0.875rem; color: var(--text-muted); line-height: 1.6; }

/* FILM TYPES TABLE */
#film-types { padding: 100px 0; background: var(--bg); }
.table-wrap { overflow-x: auto; border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.film-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.film-table thead { background: var(--primary); color: #fff; }
.film-table th { padding: 16px 20px; text-align: left; font-weight: 700; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; }
.film-table td { padding: 16px 20px; border-bottom: 1px solid var(--border); vertical-align: top; }
.film-table tbody tr:last-child td { border-bottom: none; }
.film-table tbody tr:hover { background: var(--bg-alt); }
.film-name { font-weight: 700; color: var(--primary); white-space: nowrap; }

/* AREAS */
#areas { padding: 100px 0; background: var(--bg-alt); }
.areas-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.area-group { background: #fff; border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--shadow); }
.area-city { font-size: 1.1rem; font-weight: 800; color: var(--primary); margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--primary-light); }
.area-list { display: flex; flex-direction: column; gap: 8px; }
.area-list li { font-size: 0.85rem; color: var(--text-muted); padding-left: 14px; position: relative; }
.area-list li::before { content: '·'; position: absolute; left: 0; color: var(--secondary); font-weight: 700; }
.area-note { margin-top: 20px; padding: 14px; background: var(--bg-alt); border-radius: 8px; font-size: 0.8rem; color: var(--text-muted); line-height: 1.6; }
.area-note strong { color: var(--primary); }

/* FAQ */
#faq { padding: 100px 0; background: var(--bg); }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1.5px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: border-color var(--transition); }
.faq-item.open { border-color: var(--secondary); }
.faq-q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 22px 24px; background: none; border: none; cursor: pointer; font-size: 0.95rem; font-weight: 600; color: var(--dark); text-align: left; transition: background var(--transition); }
.faq-q:hover { background: var(--bg-alt); }
.faq-item.open .faq-q { background: var(--primary-light); color: var(--primary); }
.faq-icon { flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%; background: var(--bg-alt); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; font-weight: 700; transition: transform var(--transition), background var(--transition); }
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 24px; }
.faq-item.open .faq-a { max-height: 400px; padding: 0 24px 22px; }
.faq-a div { font-size: 0.9rem; color: var(--text-muted); line-height: 1.8; padding-top: 12px; border-top: 1px solid var(--border); }
.cta-sub { color: var(--text-muted); margin-bottom: 20px; font-size: 0.95rem; text-align: center; }

/* CTA */
#cta { padding: 80px 0; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 40%, #1a7a7a 100%); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 48px; color: #fff; }
.cta-text { flex: 1; }
.cta-title { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 800; margin-bottom: 12px; }
.cta-desc { font-size: 0.95rem; color: rgba(255,255,255,0.8); margin-bottom: 20px; line-height: 1.7; }
.cta-list { display: flex; flex-direction: column; gap: 8px; }
.cta-list li { font-size: 0.9rem; color: rgba(255,255,255,0.85); }
.cta-actions { display: flex; flex-direction: column; align-items: center; gap: 14px; flex-shrink: 0; }
.cta-hours { font-size: 0.78rem; color: rgba(255,255,255,0.55); text-align: center; }

/* FOOTER */
#footer { background: var(--dark); color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer-logo { font-size: 1.4rem; font-weight: 900; color: #fff; margin-bottom: 4px; }
.footer-logo-sub { font-size: 0.78rem; color: var(--secondary); margin-bottom: 20px; }
.footer-info { font-size: 0.85rem; line-height: 1.9; margin-bottom: 16px; }
.footer-info a { color: var(--accent); transition: color var(--transition); }
.footer-info a:hover { color: #fff; }
.footer-keywords { font-size: 0.75rem; color: rgba(255,255,255,0.3); line-height: 1.8; }
.footer-nav-title { font-size: 0.78rem; font-weight: 700; color: rgba(255,255,255,0.4); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 16px; }
.footer-nav-col nav { display: flex; flex-direction: column; gap: 10px; }
.footer-nav-col a { font-size: 0.875rem; color: rgba(255,255,255,0.6); transition: color var(--transition); }
.footer-nav-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 24px 0; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; font-size: 0.78rem; color: rgba(255,255,255,0.3); }
.footer-keywords-bottom { color: rgba(255,255,255,0.2); }
.footer-disclaimer { font-size: 0.75rem; color: rgba(255,255,255,0.25); padding-bottom: 32px; line-height: 1.7; }

/* FLOATING PHONE */
.float-phone { position: fixed; bottom: 32px; right: 28px; z-index: 900; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.float-phone-btn { width: 58px; height: 58px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; box-shadow: 0 6px 24px rgba(13,92,92,0.4); transition: transform var(--transition), box-shadow var(--transition); animation: pulse 2.5s infinite; }
.float-phone-btn:hover { transform: scale(1.1); box-shadow: 0 10px 32px rgba(13,92,92,0.5); }
.float-label { font-size: 0.7rem; font-weight: 600; color: var(--primary); }
@keyframes pulse { 0%, 100% { box-shadow: 0 6px 24px rgba(13,92,92,0.4); } 50% { box-shadow: 0 6px 24px rgba(13,92,92,0.4), 0 0 0 10px rgba(13,92,92,0.1); } }

/* MOBILE CTA */
.mobile-cta { display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 950; flex-direction: row; gap: 1px; background: #fff; box-shadow: 0 -4px 20px rgba(0,0,0,0.12); }
.mobile-cta-btn { flex: 1; padding: 16px 8px; text-align: center; font-size: 0.95rem; font-weight: 700; background: var(--primary); color: #fff; transition: background var(--transition); }
.mobile-cta-btn:hover { background: var(--primary-dark); }
.mobile-cta-btn.secondary { background: var(--accent); }
.mobile-cta-btn.secondary:hover { background: var(--accent-dark); }

/* RESPONSIVE */
@media (max-width: 1024px) {
  .problems-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand-col { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav { position: fixed; inset: 0; top: 72px; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); flex-direction: column; align-items: stretch; gap: 0; padding: 20px 24px 40px; margin-left: 0; transform: translateX(100%); transition: transform 0.35s ease; overflow-y: auto; }
  .main-nav.open { transform: translateX(0); }
  .nav-link { padding: 14px 0; font-size: 1rem; border-bottom: 1px solid var(--border); border-radius: 0; }
  .nav-cta { margin: 20px 0 0; text-align: center; border-radius: 12px; }
  #hero { padding: 100px 0 60px; min-height: auto; }
  .hero-h1 { font-size: 2.4rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); max-width: 100%; }
  .br-pc { display: none; }
  #problems, #services, #why, #process, #film-types, #areas, #faq { padding: 72px 0; }
  .section-header { margin-bottom: 36px; }
  .problems-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .areas-grid { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; text-align: center; }
  .cta-list { align-items: center; }
  .cta-actions { width: 100%; }
  .btn-white, .btn-outline-white { width: 100%; justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .float-phone { bottom: 90px; }
  .mobile-cta { display: flex; }
  body { padding-bottom: 60px; }
  .process-step { flex-direction: column; gap: 12px; }
  .process-arrow { margin-left: 20px; }
}
@media (max-width: 480px) {
  .hero-h1 { font-size: 2rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .stat-num { font-size: 1.3rem; }
  .section-title { font-size: 1.4rem; }
  .container { padding: 0 16px; }
  .service-card { padding: 24px 20px; }
  .why-card { padding: 28px 24px; }
  .problem-body { padding: 20px; }
}