:root {
    --bg: #0f1115;
    --panel: #171a21;
    --panel-2: #1e222b;
    --border: #2a2f3a;
    --text: #e8e9ec;
    --muted: #9aa1ac;
    --accent: #5b8cff;
    --accent-2: #ffb454;
    --danger: #ff6b6b;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 960px; margin: 0 auto; padding: 24px 20px 60px; }

/* --- Header / Hero --- */
.hero {
    display: flex;
    gap: 24px;
    align-items: center;
    padding: 40px 0 30px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 30px;
}
.hero img.avatar {
    width: 120px; height: 120px; border-radius: 50%;
    object-fit: cover; border: 2px solid var(--border);
}
.hero h1 { margin: 0 0 6px; font-size: 28px; }
.hero .meta { color: var(--muted); font-size: 14px; }
.hero .about { margin-top: 10px; color: var(--text); max-width: 600px; }

nav.tabs {
    display: flex; flex-wrap: wrap; gap: 8px;
    margin-bottom: 30px;
}
nav.tabs a {
    padding: 8px 14px; border: 1px solid var(--border);
    border-radius: 999px; color: var(--text); font-size: 14px;
}
nav.tabs a:hover, nav.tabs a.active { background: var(--panel-2); text-decoration: none; border-color: var(--accent); }

section.block { margin-bottom: 46px; }
section.block h2 {
    font-size: 20px; border-left: 3px solid var(--accent);
    padding-left: 10px; margin-bottom: 18px;
}

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    margin-bottom: 14px;
}
.card h3 { margin: 0 0 4px; font-size: 16px; }
.card .sub { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.card p { margin: 0; font-size: 14px; }

.badge {
    display: inline-block; background: var(--panel-2);
    border: 1px solid var(--border); border-radius: 6px;
    padding: 2px 8px; font-size: 12px; color: var(--muted);
    margin-right: 6px;
}

.rating { color: var(--accent-2); font-weight: 600; }

.empty { color: var(--muted); font-style: italic; font-size: 14px; }

/* --- Библиотека книг --- */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 20px 16px;
}
.book-item { display: flex; flex-direction: column; }
.book-cover {
    position: relative;
    width: 100%;
    aspect-ratio: 2 / 3;
    border-radius: 8px;
    overflow: hidden;
    background: var(--panel-2);
    border: 1px solid var(--border);
    cursor: default;
}
.book-cover img {
    width: 100%; height: 100%; object-fit: cover; display: block;
}
.book-cover-placeholder {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    font-size: 32px; font-weight: 700; color: var(--muted);
}
.book-rating {
    position: absolute;
    right: 6px; bottom: 6px;
    width: 28px; height: 28px;
    border-radius: 50%;
    background: #2ecc71;
    color: #063d1e;
    font-size: 12px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 1px 4px rgba(0,0,0,.4);
    z-index: 2;
}
.book-review-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 17, 21, 0.94);
    padding: 10px;
    opacity: 0;
    visibility: hidden;
    transition: opacity .18s ease;
    overflow-y: auto;
    z-index: 1;
}
.book-cover:hover .book-review-overlay,
.book-cover:focus-within .book-review-overlay,
.book-cover.open .book-review-overlay {
    opacity: 1;
    visibility: visible;
}
.book-review-text { font-size: 12px; line-height: 1.45; color: var(--text); }
.book-title { margin-top: 8px; font-size: 13px; font-weight: 600; line-height: 1.3; }
.book-author { font-size: 12px; color: var(--muted); margin-top: 2px; }

.footer-login {
    text-align: center; margin-top: 40px; font-size: 13px; color: var(--muted);
}

/* --- Auth pages --- */
body.auth-page {
    display: flex; align-items: center; justify-content: center; min-height: 100vh;
}
.auth-box {
    background: var(--panel); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 30px 34px; width: 320px;
}
.auth-box h1 { margin-top: 0; font-size: 22px; }
.auth-box label { display: block; margin-bottom: 14px; font-size: 13px; color: var(--muted); }
.auth-box input {
    width: 100%; margin-top: 6px; padding: 9px 10px;
    background: var(--panel-2); border: 1px solid var(--border);
    border-radius: 6px; color: var(--text); font-size: 14px;
}
.auth-box button {
    width: 100%; padding: 10px; background: var(--accent);
    border: none; border-radius: 6px; color: #fff; font-size: 14px;
    cursor: pointer; margin-top: 6px;
}
.auth-box button:hover { opacity: .9; }
.error { color: var(--danger); font-size: 13px; }
.back-link { text-align: center; margin-top: 16px; }

/* --- Admin --- */
.admin-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 0; border-bottom: 1px solid var(--border); margin-bottom: 20px;
}
.admin-header .who { color: var(--muted); font-size: 13px; }
.admin-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.admin-nav a {
    padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px;
    color: var(--text); font-size: 14px;
}
.admin-nav a.active, .admin-nav a:hover { border-color: var(--accent); background: var(--panel-2); text-decoration: none; }

table { width: 100%; border-collapse: collapse; margin-bottom: 30px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 14px; vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

.form-box {
    background: var(--panel); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px; margin-bottom: 30px; max-width: 560px;
}
.form-box label { display: block; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
.form-box input, .form-box textarea, .form-box select {
    width: 100%; margin-top: 5px; padding: 8px 10px;
    background: var(--panel-2); border: 1px solid var(--border);
    border-radius: 6px; color: var(--text); font-size: 14px; font-family: inherit;
}
.form-box textarea { min-height: 80px; resize: vertical; }
.form-box button, .btn {
    padding: 8px 16px; background: var(--accent); border: none;
    border-radius: 6px; color: #fff; font-size: 14px; cursor: pointer;
}
.btn.danger { background: var(--danger); }
.btn.secondary { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); }
.row-actions { display: flex; gap: 8px; }
.flash { background: var(--panel-2); border: 1px solid var(--accent); padding: 10px 14px; border-radius: 8px; margin-bottom: 18px; font-size: 14px; }