/* ------------------------------------------
   Premium Single‑Page Author Site
   Design: Tactical Military & Honor Theme
   Theme: Dark olive/charcoal background, brass/gold medals accent, crimson indicators
   Fonts: Inter & Noto Sans/Serif Georgian (Google Fonts)
   Author: Kakhaber Kukunashvili (Legionnaire / Veteran)
------------------------------------------ */

:root {
  --font-primary: 'Inter', 'Noto Sans Georgian', sans-serif;
  --font-heading: 'Noto Serif Georgian', Georgia, serif;
  
  /* Color Palette - Veteran/Legionnaire theme */
  --color-bg: radial-gradient(circle at 50% 0%, #151b17 0%, #0d100e 100%);
  --color-card-bg: rgba(22, 28, 24, 0.45);
  --color-card-bg-hover: rgba(28, 38, 31, 0.65);
  --color-text-primary: #f2f5f3;
  --color-text-muted: #abb8b0;
  
  /* Accent Colors */
  --color-accent: #c5a059;          /* Warm military brass gold */
  --color-accent-hover: #e0bb73;
  --color-accent-red: #c83f3f;      /* French Foreign Legion Crimson */
  --color-border: rgba(197, 160, 89, 0.18);
  --color-border-hover: rgba(197, 160, 89, 0.35);
  
  /* Utilities */
  --border-radius: 16px;
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.5), inset 0 1px 1px rgba(255, 255, 255, 0.05);
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html,
body {
  height: 100%;
  font-family: var(--font-primary);
  background: #0d100e;
  background-image: var(--color-bg);
  background-attachment: fixed;
  color: var(--color-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

/* Site Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(13, 16, 14, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  padding: 1.2rem 0;
  z-index: 1000;
}

.nav-tabs {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.tab-btn {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 0.6rem 2rem;
  font-family: var(--font-primary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 30px;
  transition: var(--transition-smooth);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.tab-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-text-primary);
  box-shadow: 0 0 15px rgba(197, 160, 89, 0.15);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--color-accent) 0%, #a48243 100%);
  border-color: transparent;
  color: #0d100e;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(197, 160, 89, 0.3);
}

/* Hero / Autobiography Section */
.hero {
  padding: 4rem 0; /* Aligned to top, consistent with books section */
}

.profile-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3.5rem;
  align-items: center;
}

@media (min-width: 768px) {
  .profile-grid {
    grid-template-columns: 1.3fr 1fr;
    align-items: start;
  }
}

.profile-badge-container {
  display: flex;
  justify-content: center;
  position: relative;
}

.profile-badge {
  width: 100%;
  max-width: 100%;
  height: auto;
  filter: drop-shadow(0 15px 35px rgba(0, 0, 0, 0.4));
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}

.profile-content {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.badge-label {
  display: inline-block;
  align-self: flex-start;
  background: rgba(200, 63, 63, 0.12);
  border: 1px solid rgba(200, 63, 63, 0.25);
  color: #ff6b6b;
  font-family: var(--font-primary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 1.1rem;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero .author-name {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.3;
  padding-bottom: 0.15em;
  background: linear-gradient(135deg, #ffffff 40%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.bio-paragraphs {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.bio-paragraphs p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  text-align: justify;
}

/* Books Section */
.books {
  padding: 4rem 0; /* Aligned to top, consistent with hero section */
}

.books .section-title {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  text-align: center;
  line-height: 1.3;
  padding-bottom: 0.15em;
  margin-bottom: 4rem;
  background: linear-gradient(135deg, #ffffff 40%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
}

.books .section-title::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -15px;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.books-grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.book-card {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  background: var(--color-card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-glass);
  transition: var(--transition-smooth);
}

@media (min-width: 768px) {
  .book-card {
    flex-direction: row;
    align-items: flex-start;
  }
}

.book-card:hover {
  background: var(--color-card-bg-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), inset 0 1px 1px rgba(255, 255, 255, 0.08);
}

.book-cover {
  width: 100%;
  max-width: 200px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  transition: var(--transition-smooth);
  align-self: center;
}

@media (min-width: 768px) {
  .book-cover {
    align-self: flex-start;
  }
}

.book-card:hover .book-cover {
  transform: scale(1.03) rotate(-1deg);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.7);
}

.book-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.book-header-tags {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.book-genre {
  display: inline-block;
  background: rgba(197, 160, 89, 0.08);
  border: 1px solid rgba(197, 160, 89, 0.22);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.85rem;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.book-status-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.85rem;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.book-status-tag.status-available {
  background: rgba(197, 160, 89, 0.15);
  border: 1px solid rgba(197, 160, 89, 0.35);
  color: #e0bb73;
}

.book-status-tag.status-coming-soon {
  background: rgba(200, 63, 63, 0.12);
  border: 1px solid rgba(200, 63, 63, 0.28);
  color: #ff7a7a;
}

.book-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: #ffffff;
  font-weight: 700;
}

.book-description {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  text-align: justify;
}

.book-actions {
  margin-top: 1rem;
  display: flex;
  align-items: center;
}

.book-buy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: linear-gradient(135deg, var(--color-accent) 0%, #a48243 100%);
  color: #0d100e;
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.65rem 1.6rem;
  border-radius: 30px;
  text-decoration: none;
  border: 1px solid transparent;
  box-shadow: 0 4px 15px rgba(197, 160, 89, 0.25);
  transition: var(--transition-smooth);
  letter-spacing: 0.03em;
  width: fit-content;
}

.book-buy-btn:hover {
  background: linear-gradient(135deg, var(--color-accent-hover) 0%, var(--color-accent) 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(197, 160, 89, 0.4);
  color: #0d100e;
}

.book-buy-btn:active {
  transform: translateY(0);
}

.book-buy-btn svg {
  transition: transform 0.2s ease;
}

.book-buy-btn:hover svg {
  transform: translate(2px, -2px);
}

.book-btn-disabled {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-muted);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.65rem 1.6rem;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  letter-spacing: 0.03em;
  width: fit-content;
  cursor: default;
  user-select: none;
  backdrop-filter: blur(8px);
}

.book-btn-disabled svg {
  opacity: 0.7;
}

/* Footer */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  padding: 3rem 0;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  background: rgba(13, 16, 14, 0.5);
}

/* Hidden Utility */
.hidden {
  display: none !important;
}

/* Subtle scroll reveal animation */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.25, 0.8, 0.25, 1), transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
  will-change: opacity, transform;
}

[data-reveal].visible {
  opacity: 1;
  transform: translateY(0);
}

/* Media Queries */
@media (max-width: 768px) {
  .container {
    padding: 0 1.25rem;
  }

  .nav-tabs {
    gap: 0.75rem;
  }

  .tab-btn {
    padding: 0.55rem 1.4rem;
    font-size: 0.85rem;
  }

  .hero, 
  .books {
    padding: 2.5rem 0;
  }

  .hero .author-name {
    font-size: 2.1rem;
  }

  .books .section-title {
    font-size: 2rem;
    margin-bottom: 2.5rem;
  }
  
  .book-card {
    padding: 1.5rem 1.25rem;
    gap: 1.5rem;
  }

  .book-cover {
    max-width: 180px;
  }

  .book-title {
    font-size: 1.45rem;
  }

  .bio-paragraphs p, 
  .book-description {
    text-align: left;
    font-size: 0.98rem;
  }
}

@media (max-width: 480px) {
  .tab-btn {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
  }

  .hero .author-name {
    font-size: 1.8rem;
  }

  .books .section-title {
    font-size: 1.75rem;
  }

  .book-buy-btn,
  .book-btn-disabled {
    width: 100%;
    justify-content: center;
  }
}