/* ==========================================================================
   YULIA SOKOLOVA — PRIVATE PRACTICE & METAPHYSICS OF BUSINESS
   Design System & Luxury Visual Style
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-primary: #0a0e17;
  --bg-secondary: #0f172a;
  --bg-card: rgba(18, 25, 42, 0.7);
  --bg-card-hover: rgba(26, 36, 60, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.75);
  --bg-modal: #0d1424;

  /* Metallic Gold Accents */
  --gold-100: #fbf0d9;
  --gold-200: #f4dcad;
  --gold-300: #e8c480;
  --gold-400: #d8a855;
  --gold-500: #c59138;
  --gold-gradient: linear-gradient(135deg, #f7dfb0 0%, #d8a855 50%, #b87c24 100%);
  --gold-border: rgba(216, 168, 85, 0.25);
  --gold-border-glow: rgba(216, 168, 85, 0.5);

  /* Royal & Lapis Blue Accents */
  --blue-primary: #1e40af;
  --blue-vibrant: #2563eb;
  --blue-light: #3b82f6;
  --blue-glow: rgba(37, 99, 235, 0.35);

  /* Typography Colors */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-gold: #e2b474;

  /* Borders & Shadows */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glass: rgba(255, 255, 255, 0.12);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.6);
  --shadow-gold: 0 8px 32px rgba(216, 168, 85, 0.18);
  --shadow-blue: 0 8px 32px rgba(37, 99, 235, 0.2);

  /* Layout & Spacing */
  --container-max: 1240px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  /* Fonts */
  --font-serif: 'Playfair Display', 'Cinzel', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base & Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 10%, rgba(37, 99, 235, 0.1) 0%, transparent 40%),
    radial-gradient(circle at 85% 25%, rgba(216, 168, 85, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 50% 65%, rgba(30, 64, 175, 0.07) 0%, transparent 50%),
    radial-gradient(circle at 20% 90%, rgba(216, 168, 85, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Accessibility: Skip Link & Focus Styles */
.skip-link {
  position: absolute;
  top: -120px;
  left: 20px;
  background: var(--gold-gradient);
  color: #0b111e;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  z-index: 10000;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.7);
  transition: top 0.25s ease;
  text-decoration: none;
}

.skip-link:focus {
  top: 20px;
  outline: 3px solid #ffffff;
}

:focus-visible {
  outline: 2px solid var(--gold-300);
  outline-offset: 3px;
}

button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, [tabindex="0"]:focus-visible {
  outline: 2px solid var(--gold-300);
  outline-offset: 2px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(216, 168, 85, 0.3);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(216, 168, 85, 0.6);
}

/* Typography Helpers */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  color: #ffffff;
  letter-spacing: -0.01em;
}

p {
  color: var(--text-secondary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Metallic Text & Badges */
.gold-gradient-text {
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.eyebrow-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(216, 168, 85, 0.1);
  border: 1px solid var(--gold-border);
  color: var(--gold-300);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.eyebrow-badge::before {
  content: '✦';
  font-size: 0.85rem;
  color: var(--gold-300);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-fast);
  border: none;
  outline: none;
  text-align: center;
}

.btn-gold {
  background: var(--gold-gradient);
  color: #0b111e;
  box-shadow: 0 4px 20px rgba(216, 168, 85, 0.35);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(216, 168, 85, 0.5);
  filter: brightness(1.05);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--gold-border);
  color: var(--gold-200);
  transform: translateY(-2px);
}

.btn-telegram {
  background: #229ED9;
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(34, 158, 217, 0.35);
}

.btn-telegram:hover {
  background: #1e8dc2;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(34, 158, 217, 0.5);
}

.btn-icon {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition-normal);
  padding: 18px 0;
  background: rgba(10, 14, 23, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.navbar.scrolled {
  padding: 12px 0;
  background: rgba(10, 14, 23, 0.94);
  border-bottom-color: var(--gold-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-width: 0;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  flex-shrink: 1;
}

.brand-monogram {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.25) 0%, rgba(216, 168, 85, 0.2) 100%);
  border: 1px solid var(--gold-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--gold-200);
  box-shadow: inset 0 0 12px rgba(216, 168, 85, 0.15);
}

.brand-meta {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #ffffff;
  text-transform: uppercase;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--gold-300);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.6vw, 24px);
  list-style: none;
}

.nav-link {
  font-size: clamp(0.82rem, 0.95vw, 0.88rem);
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
  color: var(--gold-200);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--gold-gradient);
  transition: var(--transition-fast);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.nav-btn-telegram {
  padding: 10px 20px;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.nav-phone {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.nav-phone:hover {
  color: var(--gold-300);
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  color: #fff;
  cursor: pointer;
  padding: 0;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.mobile-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--gold-border);
}

.mobile-menu-drawer {
  display: none;
  position: fixed;
  top: 74px;
  left: 0;
  right: 0;
  background: rgba(10, 14, 23, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gold-border);
  padding: 24px;
  flex-direction: column;
  gap: 16px;
  z-index: 999;
}

.mobile-menu-drawer.open {
  display: flex;
}

.mobile-menu-drawer a {
  font-size: 1.05rem;
  font-weight: 600;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */

.hero {
  padding-top: 140px;
  padding-bottom: 90px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 50px;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: clamp(2.6rem, 5vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  line-height: 1.1;
}

.hero-profession {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gold-200);
  margin-bottom: 8px;
}

.hero-subtags {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.hero-subtags span {
  color: var(--text-muted);
}

/* Philosophy banner in hero */
.hero-manifesto-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 32px;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.manifesto-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.manifesto-tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gold-300);
  font-weight: 600;
}

.manifesto-badge {
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.manifesto-quote {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 10px;
  line-height: 1.35;
}

.manifesto-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
}

.manifesto-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill-item {
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  font-size: 0.8rem;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

/* Stats Row */
.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 36px;
}

.stat-box {
  background: rgba(18, 25, 42, 0.5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: var(--transition-fast);
}

.stat-box:hover {
  border-color: var(--gold-border);
  transform: translateY(-2px);
  background: rgba(26, 36, 60, 0.6);
}

.stat-value {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--gold-200);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.35;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

/* Hero Portrait Card */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.portrait-frame {
  position: relative;
  width: 100%;
  max-width: 460px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 50px rgba(37, 99, 235, 0.25);
  border: 1px solid var(--gold-border);
  background: #111827;
}

.portrait-frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 1410 / 1689;
  object-fit: cover;
  object-position: center top;
  display: block;
  transition: transform var(--transition-slow);
}

.portrait-frame:hover img {
  transform: scale(1.02);
}

.portrait-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120%;
  height: 120%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.3) 0%, rgba(216, 168, 85, 0.2) 50%, transparent 70%);
  z-index: -1;
  filter: blur(40px);
  pointer-events: none;
}

.portrait-overlay-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  padding: 14px 18px;
  background: rgba(10, 14, 23, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--gold-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.badge-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #ffffff;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
}

.badge-location {
  font-size: 0.75rem;
  color: var(--gold-300);
}

/* ==========================================================================
   ABOUT & METHODOLOGY SECTION
   ========================================================================== */

.section {
  padding: 75px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 40px;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: #cbd5e1;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.about-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.about-card:hover {
  border-color: var(--gold-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.about-card-action-block {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
}

.about-tag {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gold-300);
  font-weight: 600;
  margin-bottom: 12px;
}

.about-headline {
  font-size: 1.5rem;
  margin-bottom: 16px;
  color: #ffffff;
}

.about-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.credentials-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.credential-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-primary);
}

.credential-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--gold-300);
  margin-top: 2px;
}

.highlight-box {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12) 0%, rgba(216, 168, 85, 0.1) 100%);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 16px;
}

.highlight-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--gold-200);
  margin-bottom: 8px;
}

/* ==========================================================================
   BOOKS SHOWCASE (3D LUXURY PRESENTATION)
   ========================================================================== */

.books-section {
  background: linear-gradient(180deg, rgba(10, 14, 23, 0) 0%, rgba(15, 23, 42, 0.7) 50%, rgba(10, 14, 23, 0) 100%);
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.book-editorial-card {
  background: linear-gradient(165deg, rgba(17, 24, 39, 0.85) 0%, rgba(13, 20, 36, 0.95) 100%);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 290px;
  position: relative;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow: hidden;
}

.book-editorial-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold-300), transparent);
  opacity: 0.3;
  transition: opacity 0.3s ease;
}

.book-editorial-card:hover {
  transform: translateY(-6px);
  border-color: rgba(216, 168, 85, 0.55);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.55), 0 0 24px rgba(216, 168, 85, 0.16);
}

.book-editorial-card:hover::before {
  opacity: 1;
}

.book-editorial-card:focus-visible {
  outline: 2px solid var(--gold-300);
  outline-offset: 3px;
}

.book-card-top {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}

.book-edition-pill {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gold-300);
  background: rgba(216, 168, 85, 0.1);
  border: 1px solid rgba(216, 168, 85, 0.28);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  line-height: 1.2;
}

.book-status-pill {
  align-self: flex-start;
  font-size: 0.68rem;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  line-height: 1.2;
}

.book-card-body {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.book-monogram-mark {
  font-family: var(--font-serif);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gold-200);
  background: rgba(216, 168, 85, 0.08);
  border: 1px solid rgba(216, 168, 85, 0.22);
  width: fit-content;
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.book-editorial-title {
  font-family: var(--font-serif);
  font-size: 1.22rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.35;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.book-editorial-author {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gold-200);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.book-editorial-desc {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text-secondary);
  margin: 0;
  flex-grow: 1;
}

.book-card-footer {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.book-read-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--gold-300);
  transition: color 0.2s ease, transform 0.2s ease;
}

.book-editorial-card:hover .book-read-link {
  color: #ffffff;
  transform: translateX(4px);
}

.book-read-link svg {
  transition: transform 0.2s ease;
}

.book-editorial-card:hover .book-read-link svg {
  transform: translateX(2px);
}

/* ==========================================================================
   TRACKS / DIRECTIONS SECTION (BUSINESS & PERSONAL)
   ========================================================================== */

.tracks-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.tab-btn {
  padding: 12px 28px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.tab-btn:hover {
  color: #ffffff;
  border-color: var(--border-glass);
}

.tab-btn.active {
  background: var(--gold-gradient);
  color: #0b111e;
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(216, 168, 85, 0.3);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.inquiries-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.inquiry-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.inquiry-card:hover {
  border-color: var(--gold-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background: var(--bg-card-hover);
}

.inquiry-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.inquiry-category {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gold-300);
  font-weight: 600;
}

.inquiry-num {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--text-muted);
}

.inquiry-title {
  font-size: 1.3rem;
  margin-bottom: 14px;
  color: #ffffff;
}

.inquiry-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.inquiry-focus {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--gold-200);
  font-weight: 500;
}

/* ==========================================================================
   RESULTS & TRUST SECTION
   ========================================================================== */

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.result-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: var(--transition-normal);
}

.result-card:hover {
  border-color: var(--gold-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.result-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.2) 0%, rgba(216, 168, 85, 0.15) 100%);
  border: 1px solid var(--gold-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--gold-300);
}

.result-title {
  font-size: 1.18rem;
  margin-bottom: 12px;
  color: #ffffff;
}

.result-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   COMMUNITY & EVENTS BANNER
   ========================================================================== */

.community-banner {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 41, 70, 0.7) 100%);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-lg);
  padding: 50px 60px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.community-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.community-tag {
  color: var(--gold-300);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.community-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 18px;
}

.community-desc {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.community-badges {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.comm-badge-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-glass);
}

.comm-badge-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(216, 168, 85, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-300);
  flex-shrink: 0;
}

.comm-badge-text h4 {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
}

.comm-badge-text p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==========================================================================
   CONTACTS & AUDIT BOOKING SECTION
   ========================================================================== */

.contact-section {
  background: radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.08) 0%, transparent 60%);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-links-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin: 30px 0;
}

.contact-link-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  transition: var(--transition-fast);
}

.contact-link-item:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: var(--gold-border);
  transform: translateX(4px);
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(37, 99, 235, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  flex-shrink: 0;
}

.contact-icon.tg {
  background: #229ED9;
}

.contact-icon.wa {
  background: rgba(37, 211, 102, 0.2);
  color: #25d366;
}

.contact-icon.gold {
  background: rgba(216, 168, 85, 0.2);
  color: var(--gold-300);
}

.contact-text-meta h4 {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-text-meta p {
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
}

.qr-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
}

.qr-img {
  width: 90px;
  height: 90px;
  border-radius: 12px;
  background: #ffffff;
  padding: 6px;
}

/* Appointment Form Card */
.contact-form-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: #ffffff;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition-fast);
  outline: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--gold-400);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 12px rgba(216, 168, 85, 0.2);
}

.form-input.invalid, .form-textarea.invalid, .form-select.invalid {
  border-color: #f87171 !important;
  background: rgba(239, 68, 68, 0.08);
}

.field-error {
  color: #fca5a5;
  font-size: 0.8rem;
  margin-top: 6px;
  display: none;
}

.field-error.visible {
  display: block;
}

.form-checkbox-group {
  margin: 18px 0 14px;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.84rem;
  color: var(--text-secondary);
  cursor: pointer;
  line-height: 1.45;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--gold-400);
  cursor: pointer;
  flex-shrink: 0;
}

.legal-link-btn {
  color: var(--gold-300);
  text-decoration: underline;
  background: none;
  border: none;
  cursor: pointer;
  font-size: inherit;
  padding: 0;
  display: inline;
}

.legal-link-btn:hover {
  color: #ffffff;
}

.form-note-honest {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-top: 14px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--gold-400);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.disclaimer-banner {
  margin-top: 36px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(216, 168, 85, 0.35);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.disclaimer-icon {
  font-size: 1.4rem;
  line-height: 1;
  flex-shrink: 0;
}

.disclaimer-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.disclaimer-text strong {
  color: var(--gold-200);
}

.legal-status-notice {
  background: rgba(216, 168, 85, 0.1);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 20px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 0.85rem;
  color: var(--gold-200);
  line-height: 1.45;
}

.legal-status-notice svg {
  flex-shrink: 0;
  margin-top: 2px;
}

.form-select option {
  background: var(--bg-secondary);
  color: #fff;
}

.form-consent {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: 14px;
}

.form-consent a {
  color: var(--gold-300);
  text-decoration: underline;
  cursor: pointer;
}

/* Toast Message */
.toast-msg {
  display: none;
  padding: 14px;
  border-radius: var(--radius-sm);
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid #10b981;
  color: #6ee7b7;
  font-size: 0.9rem;
  margin-top: 16px;
  text-align: center;
}

/* ==========================================================================
   FOOTER & LEGAL LINKS
   ========================================================================== */

.footer {
  background: #070a12;
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  font-size: 0.88rem;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gold-200);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--gold-300);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.legal-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
}

.legal-modal-trigger {
  color: var(--text-secondary);
  cursor: pointer;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 0.82rem;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
}

.legal-modal-trigger:hover {
  color: #ffffff;
  background: rgba(216, 168, 85, 0.12);
  border-color: rgba(216, 168, 85, 0.35);
}

/* ==========================================================================
   MODAL WINDOWS (LEGAL & QUICK BOOKING)
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  box-sizing: border-box;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal-backdrop.active {
  display: flex;
  opacity: 1;
}

.modal-dialog {
  background: var(--bg-modal);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 780px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.9);
  position: relative;
  transform: scale(0.95);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
  box-sizing: border-box;
}

.modal-backdrop.active .modal-dialog {
  transform: scale(1);
}

.modal-header {
  padding: 22px 28px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  background: rgba(255, 255, 255, 0.02);
}

.modal-header h3 {
  font-size: 1.25rem;
  line-height: 1.35;
  color: #ffffff;
  margin: 0;
  word-break: break-word;
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.modal-close-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.modal-body {
  padding: 30px;
  overflow-y: auto;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.modal-body h4 {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  color: var(--gold-200);
  margin: 22px 0 10px;
}

.modal-body p {
  margin-bottom: 14px;
}

.modal-body ul {
  padding-left: 20px;
  margin-bottom: 16px;
}

.modal-body li {
  margin-bottom: 8px;
}

.modal-footer {
  padding: 18px 30px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  background: rgba(255, 255, 255, 0.02);
}

/* ==========================================================================
   RESPONSIVE DESIGN & ADAPTIVITY (ROBUST MULTI-TIER SYSTEM)
   ========================================================================== */

/* Breakpoint 1: 1140px — collapse desktop nav to hamburger drawer to prevent horizontal overflow */
@media (max-width: 1140px) {
  .nav-links, .nav-phone {
    display: none;
  }

  .mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .books-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
}

/* Breakpoint 2: 1024px — tablet & small desktop */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }

  .hero-visual {
    order: -1;
    margin-bottom: 20px;
  }

  .portrait-frame {
    max-width: 360px;
    margin: 0 auto;
  }

  .about-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .community-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .results-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }
}

/* Breakpoint 3: 768px — tablets & mobile devices */
@media (max-width: 768px) {
  .section {
    padding: 44px 0;
  }

  .section-header {
    margin-bottom: 28px;
  }

  .section-title {
    margin-bottom: 12px;
  }

  .hero {
    padding-top: 105px;
    padding-bottom: 44px;
  }

  .hero-title {
    font-size: clamp(2.1rem, 7vw, 2.8rem);
  }

  .portrait-overlay-badge {
    bottom: 14px;
    left: 14px;
    right: 14px;
    padding: 10px 14px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .hero-stats-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .inquiries-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .inquiry-card {
    padding: 24px 20px;
  }

  .books-grid {
    grid-template-columns: minmax(0, 1fr);
    max-width: 480px;
    margin: 0 auto;
    gap: 20px;
  }

  .results-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .legal-links-row {
    justify-content: center;
    gap: 8px 10px;
  }

  .contact-form-card {
    padding: 24px 18px;
  }

  .qr-card {
    flex-direction: column;
    text-align: center;
  }
}

/* Breakpoint 4: 480px and down — ultra-compact screens (320px - 480px) */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  /* Sticky Navbar Geometry on Mobile (320px - 480px) */
  .navbar {
    padding: 12px 0;
  }

  .navbar.scrolled {
    padding: 10px 0;
  }

  .navbar-container {
    gap: 12px;
  }

  .nav-brand {
    gap: 10px;
    min-width: 0;
  }

  .brand-monogram {
    width: 38px;
    height: 38px;
    min-width: 38px;
    font-size: 1rem;
    border-radius: 6px;
  }

  .brand-meta {
    min-width: 0;
    overflow: hidden;
  }

  .brand-name {
    font-size: 0.95rem;
    letter-spacing: 0.03em;
    white-space: nowrap;
  }

  .brand-subtitle {
    font-size: 0.62rem;
    letter-spacing: 0.05em;
    white-space: nowrap;
  }

  .nav-cta {
    gap: 8px;
    flex-shrink: 0;
  }

  /* Telegram icon-only button with aria-label & >=44x44 touch target */
  .nav-btn-telegram {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }

  .nav-btn-telegram .btn-icon {
    width: 22px;
    height: 22px;
    margin: 0;
  }

  .nav-btn-telegram .nav-btn-text {
    display: none;
  }

  .mobile-toggle {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }

  .mobile-menu-drawer {
    top: 68px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .tracks-tabs {
    flex-direction: column;
    gap: 10px;
  }

  .tab-btn {
    width: 100%;
  }

  .books-grid {
    max-width: 100%;
  }

  .modal-dialog {
    margin: 10px;
    max-height: 90vh;
  }

  .modal-header, .modal-footer {
    padding: 14px 16px;
  }

  .modal-header h3 {
    font-size: 1.05rem;
  }

  .modal-body {
    padding: 16px;
  }
}

/* Breakpoint 5: 340px and down — ultra-narrow screens (e.g. 320px) */
@media (max-width: 340px) {
  .container {
    padding: 0 10px;
  }

  .navbar-container {
    gap: 10px;
  }

  .nav-brand {
    gap: 8px;
  }

  .brand-monogram {
    width: 34px;
    height: 34px;
    min-width: 34px;
    font-size: 0.9rem;
  }

  .brand-name {
    font-size: 0.85rem;
  }

  .brand-subtitle {
    font-size: 0.56rem;
  }

  .nav-cta {
    gap: 6px;
  }

  .nav-btn-telegram {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
  }

  .mobile-toggle {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .book-editorial-card {
    transform: none !important;
    transition: none !important;
  }
}