:root {
    --blue: #1a56b0;
    --blue-dark: #0f3d80;
    --blue-light: #e8f0fc;
    --blue-mid: #2d6fd4;
    --accent: #f0a500;
    --text: #1a1a2e;
    --text-muted: #5a6480;
    --bg: #f4f7fc;
    --white: #ffffff;
    --border: #d0daf0;
    --shadow: 0 2px 12px rgba(26, 86, 176, 0.10);
    --radius: 12px;
    --even-color: #1a56b0;
    --odd-color: #2e7d32;
}

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

body {
    font-family: 'Geologica', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { text-decoration: none; color: inherit; }

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

/* HEADER */
.site-header {
    background: var(--blue);
    color: white;
    padding: 16px 0;
    box-shadow: 0 2px 16px rgba(15, 61, 128, 0.25);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon { font-size: 28px; }

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-title {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo-sub {
    font-size: 11px;
    opacity: 0.75;
    font-weight: 300;
    letter-spacing: 0.3px;
}

/* BREADCRUMB */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
}

.crumb {
    opacity: 0.8;
    transition: opacity 0.2s;
}

.crumb:hover { opacity: 1; text-decoration: underline; }
.crumb.current { opacity: 1; font-weight: 600; }
.crumb-sep { opacity: 0.5; }

/* MAIN */
.main {
    flex: 1;
    padding: 36px 0 48px;
}

/* HERO */
.page-hero {
    margin-bottom: 28px;
}

.page-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--blue-dark);
    margin-bottom: 6px;
}

.page-sub {
    font-size: 15px;
    color: var(--text-muted);
    font-weight: 300;
}

/* CARDS */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
    margin-bottom: 28px;
}

.card {
    background: var(--white);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
    box-shadow: var(--shadow);
}

.card:hover {
    border-color: var(--blue-mid);
    box-shadow: 0 4px 20px rgba(26, 86, 176, 0.18);
    transform: translateY(-2px);
}

.card-icon { font-size: 24px; flex-shrink: 0; }

.card-body {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex: 1;
    gap: 8px;
}

.card-title {
    font-weight: 600;
    font-size: 15px;
    color: var(--text);
}

.card-arrow {
    color: var(--blue-mid);
    font-size: 18px;
    font-weight: 700;
    transition: transform 0.2s;
}

.card:hover .card-arrow { transform: translateX(4px); }

/* SCHEDULE */
.schedule-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 28px;
}

.day-block {
    background: var(--white);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.day-empty {
    opacity: 0.6;
}

.day-header {
    background: var(--blue);
    color: white;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.day-name {
    font-weight: 700;
    font-size: 15px;
    letter-spacing: 0.3px;
}

.day-badge {
    font-size: 11px;
    background: rgba(255,255,255,0.2);
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.day-badge.free {
    background: rgba(255,255,255,0.1);
    opacity: 0.7;
}

/* LESSONS */
.lessons {
    padding: 4px 0;
}

.lesson {
    display: flex;
    gap: 0;
    padding: 12px 20px;
    border-bottom: 1px solid var(--blue-light);
    transition: background 0.15s;
}

.lesson:last-child { border-bottom: none; }
.lesson:hover { background: var(--blue-light); }

.lesson-odd-pair {
    padding-top: 6px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    background: #fafbff;
}

.lesson-odd-pair:hover { background: var(--blue-light); }

.lesson-meta {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 90px;
    gap: 4px;
    padding-right: 16px;
    border-right: 2px solid var(--blue-light);
    margin-right: 16px;
    flex-shrink: 0;
}

.lesson-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 22px;
    font-weight: 600;
    color: var(--blue);
    line-height: 1;
}

.lesson-time {
    font-size: 10px;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.4;
    font-family: 'JetBrains Mono', monospace;
}

.invisible {
    visibility: hidden;
}

.lesson-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
    justify-content: center;
}

.lesson-text {
    font-size: 14px;
    line-height: 1.5;
    color: var(--text);
}

/* WEEK BADGES */
.week-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 20px;
    letter-spacing: 0.4px;
    width: fit-content;
}

.week-cetnaя, .week-cetnaya {
    background: #dbeafe;
    color: var(--even-color);
    border: 1px solid #93c5fd;
}

.week-necëtnaя, .week-necetnaya {
    background: #dcfce7;
    color: var(--odd-color);
    border: 1px solid #86efac;
}

/* Fallback for all week badges */
[class^="week-badge"] { }

.week-badge.week-чётная,
span.week-badge:not([class*="necet"]) {
    background: #dbeafe;
    color: var(--even-color);
    border: 1px solid #93c5fd;
}

/* BACK BUTTON */
.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--blue);
    font-weight: 600;
    font-size: 14px;
    padding: 10px 18px;
    border: 2px solid var(--blue);
    border-radius: 8px;
    transition: background 0.2s, color 0.2s;
    margin-top: 4px;
}

.btn-back:hover {
    background: var(--blue);
    color: white;
}

/* EMPTY STATE */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-muted);
    font-size: 15px;
    grid-column: 1/-1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.empty-state span { font-size: 40px; }

/* FOOTER */
.site-footer {
    background: var(--blue-dark);
    color: rgba(255,255,255,0.6);
    padding: 16px 0;
    font-size: 13px;
    text-align: center;
}

.site-footer a {
    color: rgba(255,255,255,0.85);
    text-decoration: underline;
}

/* RESPONSIVE */
@media (max-width: 600px) {
    .page-title { font-size: 22px; }
    .card-grid { grid-template-columns: 1fr; }
    .lesson-meta { min-width: 70px; }
    .lesson-time { font-size: 9px; }
    .breadcrumb { display: none; }
}

/* WEEK BADGES - правильные классы */
.badge-even {
    background: #dbeafe;
    color: #1a56b0;
    border: 1px solid #93c5fd;
}

.badge-odd {
    background: #dcfce7;
    color: #2e7d32;
    border: 1px solid #86efac;
}

.lesson-pair-alt {
    background: #fafbff;
    border-top: 1px dashed #d0daf0 !important;
}

.lesson-meta-hidden .lesson-num {
    color: #d0daf0;
    font-size: 16px;
}

.lesson-meta-hidden .lesson-time {
    visibility: hidden;
}

.badge-even {
    background: #dbeafe;
    color: #1a56b0;
    border: 1px solid #93c5fd;
}

.badge-odd {
    background: #dcfce7;
    color: #2e7d32;
    border: 1px solid #86efac;
}

.lesson-pair-alt {
    background: #fafbff;
    border-top: 1px dashed #d0daf0 !important;
}

.lesson-meta-hidden .lesson-num {
    color: #d0daf0;
    font-size: 16px;
}

.lesson-meta-hidden .lesson-time {
    visibility: hidden;
}