:root {
  /* USSR / Constructivism palette */
  --color-bg: #F3E6C7;              /* paper */
  --color-paper: #EAD9B4;           /* card paper */
  --color-ink: #111111;             /* ink */
  --color-ink-light: #3A3A37;       /* muted ink */
  --color-accent: #C8102E;          /* poster red */
  --color-accent-hover: #6E0B1C;    /* deep red */
  --color-gold: #C9A227;            /* brass */
  --color-border: rgba(17,17,17,0.14);

  --font-display: 'Oswald', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  --font-body: 'PT Serif', Georgia, serif;
  --font-ui: 'PT Sans Caption', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;

  --shadow-card: 0 6px 24px rgba(0,0,0,0.10), 0 1px 3px rgba(0,0,0,0.06);
  --shadow-card-hover: 0 24px 70px rgba(0,0,0,0.22), 0 10px 28px rgba(0,0,0,0.16);
}

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

        body {
            font-family: var(--font-body);
            background: var(--color-bg);
            background-image:
              radial-gradient(circle at 12% 10%, rgba(0,0,0,0.06), transparent 55%),
              radial-gradient(circle at 85% 0%, rgba(200,16,46,0.08), transparent 52%),
              radial-gradient(circle at 80% 90%, rgba(201,162,39,0.07), transparent 55%),
              repeating-linear-gradient(0deg, rgba(0,0,0,0.02) 0, rgba(0,0,0,0.02) 1px, transparent 1px, transparent 7px);
            color: var(--color-ink);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

        /* ========== HEADER ========== */
        .header {
            background:
              linear-gradient(90deg, var(--color-accent), var(--color-gold), var(--color-accent)) top/100% 5px no-repeat,
              radial-gradient(circle at 18% 0%, rgba(201,162,39,0.18), transparent 60%),
              radial-gradient(circle at 80% 30%, rgba(200,16,46,0.10), transparent 55%),
              linear-gradient(135deg, #0D0D0D 0%, #1B1B1B 100%);
            padding: 4rem 1.5rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .header::before {
            content: '';
            position: absolute;
            top: -45%;
            left: -35%;
            width: 85%;
            height: 200%;
            background: linear-gradient(135deg, rgba(200,16,46,0.92) 0%, rgba(110,11,28,0.92) 70%);
            transform: rotate(-12deg);
            opacity: 0.95;
            pointer-events: none;
        }

        .header::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 110px;
            background: linear-gradient(to top, var(--color-bg), transparent);
            pointer-events: none;
        }

        

        .header > * {
            position: relative;
            z-index: 1;
        }
.header-ornament {
            font-family: var(--font-ui);
            font-size: 1.1rem;
            color: var(--color-gold);
            letter-spacing: 0.55rem;
            margin-bottom: 1.5rem;
            opacity: 0;
            animation: fadeInDown 0.8s ease forwards;
        }

        .header h1 {
            font-family: var(--font-display);
            font-size: clamp(2.4rem, 6vw, 4rem);
            font-weight: 600;
            color: var(--color-paper);
            margin-bottom: 0.6rem;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            text-shadow: 0 10px 30px rgba(0,0,0,0.45);
            opacity: 0;
            animation: fadeInUp 0.8s ease 0.2s forwards;
        }

        .header .subtitle {
            font-family: var(--font-ui);
            font-size: clamp(1.0rem, 2.5vw, 1.25rem);
            font-weight: 700;
            font-style: normal;
            text-transform: uppercase;
            letter-spacing: 0.18em;
            color: var(--color-gold);
            opacity: 0;
            animation: fadeInUp 0.8s ease 0.4s forwards;
        }

        /* ========== ANIMATIONS ========== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeInDown {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeInLeft {
            from {
                opacity: 0;
                transform: translateX(-50px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        @keyframes fadeInRight {
            from {
                opacity: 0;
                transform: translateX(50px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        /* Scroll animation classes */
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(40px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }

        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .animate-on-scroll.from-left {
            transform: translateX(-50px);
        }

        .animate-on-scroll.from-left.visible {
            transform: translateX(0);
        }

        .animate-on-scroll.from-right {
            transform: translateX(50px);
        }

        .animate-on-scroll.from-right.visible {
            transform: translateX(0);
        }

        /* Utilities */
        .is-hidden { display: none !important; }

        /* CSP-safe stagger classes (no inline style attributes) */
        .delay-0 { transition-delay: 0s; }
        .delay-1 { transition-delay: 0.1s; }
        .delay-2 { transition-delay: 0.2s; }
        .delay-3 { transition-delay: 0.3s; }
        .delay-4 { transition-delay: 0.4s; }
        .delay-5 { transition-delay: 0.5s; }
        .delay-6 { transition-delay: 0.6s; }
        .delay-7 { transition-delay: 0.7s; }
        .delay-8 { transition-delay: 0.8s; }
        .delay-9 { transition-delay: 0.9s; }
        .delay-10 { transition-delay: 1.0s; }
        .delay-11 { transition-delay: 1.1s; }
        .delay-12 { transition-delay: 1.2s; }
        .delay-13 { transition-delay: 1.3s; }
        .delay-14 { transition-delay: 1.4s; }
        .delay-15 { transition-delay: 1.5s; }
        .delay-16 { transition-delay: 1.6s; }
        .delay-17 { transition-delay: 1.7s; }
        .delay-18 { transition-delay: 1.8s; }
        .delay-19 { transition-delay: 1.9s; }

        .sdelay-0 { transition-delay: 0s; }
        .sdelay-1 { transition-delay: 0.05s; }
        .sdelay-2 { transition-delay: 0.10s; }
        .sdelay-3 { transition-delay: 0.15s; }
        .sdelay-4 { transition-delay: 0.20s; }
        .sdelay-5 { transition-delay: 0.25s; }

        /* ========== ABOUT AUTHOR SECTION ========== */
        .about-author {
            background: var(--color-bg);
            padding: 4rem 1.5rem;
            border-bottom: 2px solid var(--color-border);
            }

        .about-author-inner {
            max-width: 1000px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 3rem;
            align-items: center;
        }

        .author-photo-wrapper {
            position: relative;
            display: inline-block;
        }

        .author-photo {
            width: 100%;
            aspect-ratio: 3/4;
            object-fit: cover;
            object-position: top center;
            border-radius: 12px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.15);
            transition: transform 0.5s ease, box-shadow 0.5s ease;
            border: 4px solid var(--color-gold);
            background: var(--color-paper);
            padding: 8px;
        }

        .author-photo-wrapper:hover .author-photo {
            transform: scale(1.03);
            box-shadow: 0 20px 60px rgba(0,0,0,0.25);
            border-color: var(--color-accent);
        }

        .author-info h2 {
            font-family: var(--font-display);
            font-size: 2rem;
            color: var(--color-ink);
            margin-bottom: 0.5rem;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

        .author-title {
            font-family: var(--font-ui);
            font-size: 0.85rem;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.18em;
            margin-bottom: 1.5rem;
        }

        .author-bio {
            font-size: 1rem;
            color: var(--color-ink-light);
            line-height: 1.8;
        }

        .author-bio p {
            margin-bottom: 1rem;
        }

        .author-stats {
            display: flex;
            gap: 2rem;
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--color-border);
        }

        .stat {
            text-align: center;
        }

        .stat-number {
            font-family: var(--font-display);
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1;
        }

        .stat-label {
            font-family: var(--font-ui);
            font-size: 0.78rem;
            color: var(--color-ink-light);
            text-transform: uppercase;
            letter-spacing: 0.08em;
        }

        /* ========== MAIN ========== */
        .main {
            max-width: 1000px;
            margin: 0 auto;
            padding: 4rem 1.5rem;
        }

        .section-title {
            font-family: var(--font-display);
            font-size: 2.25rem;
            text-align: center;
            color: var(--color-ink);
            margin-bottom: 0.75rem;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            position: relative;
            line-height: 1.08;
        }

        /* Title ornament (separate row below the title, so it never overlaps letters) */
        .title-ornament {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            margin: 10px auto 22px;
            max-width: 680px;
        }

        .title-ornament::before,
        .title-ornament::after {
            content: '';
            height: 2px;
            flex: 1;
            background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
            opacity: 0.95;
        }

        .star-badge {
            width: 34px;
            height: 34px;
            display: grid;
            place-items: center;
            border: 2px solid var(--color-gold);
            background: rgba(243, 230, 199, 0.92);
            border-radius: 8px;
            font-size: 18px;
            line-height: 1;
            color: var(--color-accent);
            box-shadow: 0 6px 18px rgba(0,0,0,0.12);
        }
.section-subtitle {
            text-align: center;
            color: var(--color-ink-light);
            margin-bottom: 3rem;
            font-size: 1.02rem;
            font-family: var(--font-ui);
            letter-spacing: 0.02em;
        }

        /* ========== BOOKS LIST ========== */
        .books-list {
            display: flex;
            flex-direction: column;
            gap: 3rem;
        }

        /* ========== BOOK CARD with 3D effect ========== */
        .book-card {
            background: var(--color-paper);
            background-image: radial-gradient(circle at 12% 20%, rgba(0,0,0,0.04), transparent 55%);
            border: 1px solid var(--color-border);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            display: grid;
            grid-template-columns: 1fr 1fr;
            min-height: 320px;
            
            /* 3D Transform setup */
            transform-style: preserve-3d;
            perspective: 1000px;
            transition: transform 0.4s ease, box-shadow 0.4s ease;
        
            position: relative;
}

        /* Single-column fallback card (used for error state) */
        .book-card--single {
            grid-template-columns: 1fr !important;
            min-height: auto;
        }

        

        .book-card::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 0;
            width: 6px;
            background: linear-gradient(180deg, var(--color-accent), var(--color-accent-hover));
            opacity: 0.95;
        }

        .book-card:nth-child(even)::before {
            left: auto;
            right: 0;
        }
.book-card:hover {
            transform: translateY(-10px) rotateX(2deg) rotateY(-2deg);
            box-shadow: var(--shadow-card-hover);
        }

        .book-card:nth-child(even) {
            direction: rtl;
        }

        .book-card:nth-child(even):hover {
            transform: translateY(-10px) rotateX(2deg) rotateY(2deg);
        }

        .book-card:nth-child(even) > * {
            direction: ltr;
        }

        .book-cover {
            position: relative;
            overflow: hidden;
            background: #222;
            min-height: 300px;
        }

        .book-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .book-card:hover .book-cover img {
            transform: scale(1.08);
        }

        /* Shine effect on hover */
        .book-cover::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 50%;
            height: 100%;
            background: linear-gradient(
                90deg,
                transparent,
                rgba(255,255,255,0.2),
                transparent
            );
            transition: left 0.6s ease;
        }

        .book-card:hover .book-cover::after {
            left: 150%;
        }

        .book-status {
            position: absolute;
            top: 1rem;
            left: 1rem;
            background: rgba(200,16,46,0.92);
            color: rgba(255,255,255,0.95);
            padding: 0.55rem 1.05rem;
            font-size: 0.72rem;
            font-weight: 700;
            font-family: var(--font-ui);
            text-transform: uppercase;
            letter-spacing: 0.12em;
            border-radius: 3px;
            border: 2px solid rgba(243,230,199,0.78);
            z-index: 2;
            box-shadow: 0 6px 22px rgba(0,0,0,0.28);
            transform: rotate(-2deg);
        }

        .book-card:nth-child(even) .book-status {
            left: auto;
            right: 1rem;
        }

        .book-status.completed {
            background: rgba(31,107,42,0.92);
            border-color: rgba(243,230,199,0.78);
        }

        .book-info {
            padding: 2.5rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .book-title {
            font-family: var(--font-display);
            font-size: 1.65rem;
            font-weight: 600;
            color: var(--color-ink);
            margin-bottom: 1rem;
            line-height: 1.25;
            letter-spacing: 0.03em;
            transition: color 0.3s ease;
        }

        .book-card:hover .book-title {
            color: var(--color-accent);
        }

        .book-description {
            font-size: 0.95rem;
            color: var(--color-ink-light);
            line-height: 1.8;
            margin-bottom: 1.5rem;
        }

        .book-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 1rem 2rem;
            background: var(--color-accent);
            color: rgba(255,255,255,0.96);
            text-decoration: none;
            font-weight: 700;
            font-family: var(--font-ui);
            font-size: 0.95rem;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            border-radius: 8px;
            border: 1px solid rgba(201,162,39,0.55);
            transition: all 0.3s ease;
            align-self: flex-start;
            position: relative;
            overflow: hidden;
        }

        .book-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s ease;
        }

        .book-btn:hover::before {
            left: 100%;
        }

        .book-btn:hover {
            background: var(--color-accent-hover);
            transform: translateX(5px);
            box-shadow: 0 10px 28px rgba(200, 16, 46, 0.35);
            border-color: rgba(201,162,39,0.9);
        }

        .book-btn.completed {
            background: #2e7d32;
            pointer-events: none;
        }

        /* ========== FOOTER ========== */
        .footer {
            background:
              linear-gradient(90deg, var(--color-accent), var(--color-gold), var(--color-accent)) top/100% 4px no-repeat,
              linear-gradient(135deg, #0D0D0D 0%, #1B1B1B 100%);
            text-align: center;
            padding: 3rem 1.5rem;
            margin-top: 2rem;
        }

        .footer-ornament {
            font-family: var(--font-ui);
            color: var(--color-gold);
            font-size: 1.05rem;
            letter-spacing: 0.35rem;
            margin-bottom: 1rem;
        }

        .footer p {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 768px) {
            .about-author-inner {
                grid-template-columns: 1fr;
                text-align: center;
            }
            
            .author-photo-wrapper {
                max-width: 250px;
                margin: 0 auto;
            }
            
            .author-stats {
                justify-content: center;
            }
            
            .book-card {
                grid-template-columns: 1fr;
            }
            
            .book-card:nth-child(even) {
                direction: ltr;
            }
            
            .book-card:nth-child(even) .book-status {
                left: 1rem;
                right: auto;
            }
            
            .book-card:hover {
                transform: translateY(-5px);
            }
            
            .book-cover {
                min-height: 220px;
            }
            
            .book-info {
                padding: 1.5rem;
            }
            
            .book-btn {
                width: 100%;
                justify-content: center;
            }
            
            .header {
                padding: 3rem 1rem;
            }
            
            .main {
                padding: 3rem 1rem;
            }

            /* Title ornament spacing on smaller screens */
            .section-title {
                line-height: 1.06;
            }
            .title-ornament {
                margin: 10px auto 18px;
                max-width: 520px;
            }
        }

        @media (max-width: 420px) {
            .section-title {
                font-size: 2rem;
                letter-spacing: 0.04em;
            }
            .title-ornament {
                gap: 12px;
            }
            .star-badge {
                width: 30px;
                height: 30px;
                font-size: 16px;
                border-radius: 7px;
            }
        }

/* ===== Improvements: accessibility + performance ===== */

/* Better keyboard focus */
.book-btn:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 3px;
}

/* Only apply hover transforms when the device actually supports hover */
@media (hover: none) {
  .book-card:hover { transform: none; }
  .book-card:hover .book-cover img { transform: none; }
  .book-card:hover .book-cover::after { left: -100%; }
  .author-photo-wrapper:hover .author-photo { transform: none; }
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .animate-on-scroll { opacity: 1 !important; transform: none !important; }

  /* Header must not stay transparent when animations are disabled */
  .header-ornament,
  .header h1,
  .header .subtitle {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Cover placeholder text layer (used when image is missing) */
.book-cover.placeholder {
  display: grid;
  place-items: center;
  background: #222;
}

.book-cover.placeholder .placeholder-text {
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
  text-align: center;
  padding: 1rem;
  line-height: 1.4;
}


/* --- Supporters comments (bottom section) --- */
.supporters-section{
  margin-top: 3.5rem;
  padding-top: 2.75rem;
  border-top: 2px solid rgba(201,162,39,0.55);
}

.supporters-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1.4rem;
}

.supporter-card{
  background: var(--color-paper);
  border: 1px solid rgba(201,162,39,0.55);
  border-left: 6px solid var(--color-accent);
  border-radius: 14px;
  padding: 1.2rem 1.2rem 1.15rem;
  box-shadow: 0 10px 28px rgba(0,0,0,0.12);
  position: relative;
  overflow: hidden;
}

.supporter-card::after{
  content: "★";
  position: absolute;
  right: 14px;
  top: 10px;
  font-size: 22px;
  opacity: 0.12;
  color: var(--color-accent);
  pointer-events: none;
  transform: rotate(10deg);
}

.supporter-name{
  font-family: var(--font-ui);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink);
  margin: 0 0 0.55rem 0;
}

.supporter-comment{
  font-family: var(--font-body);
  color: var(--color-ink-light);
  line-height: 1.65;
  margin: 0;
}

.supporters-actions{
  display: flex;
  justify-content: center;
  margin-top: 1.6rem;
}

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.7rem;
  border-radius: 10px;
  border: 1px solid rgba(201,162,39,0.65);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.btn:focus-visible{
  outline: 3px solid rgba(200,16,46,0.35);
  outline-offset: 3px;
}

.btn-secondary{
  background: rgba(17,17,17,0.92);
  color: rgba(255,255,255,0.96);
  box-shadow: 0 10px 22px rgba(0,0,0,0.16);
}

.btn-secondary:hover{
  background: var(--color-ink);
  transform: translateY(-1px);
}

@media (max-width: 420px){
  .supporters-section{
    margin-top: 3rem;
    padding-top: 2.25rem;
  }
  .supporters-grid{
    grid-template-columns: 1fr;
  }
  .supporter-card{
    padding: 1.05rem 1.05rem 1rem;
  }
}