/* ════════════════════════════════════════════════
   contest-info.css
   Platonic – Contest Info Page Styles
   ════════════════════════════════════════════════ */

/* ── CUSTOM PROPERTIES ─────────────────────────── */
:root {
    --bg-main:         #FFFFFF;
    --bg-sidebar:      #F8FAFC;
    --blue:            #3B82F6;
    --blue-hover:      #2563EB;
    --purple:          #7471D9;
    --purple-hover:    #5f5cbd;
    --text-dark:       #444444;
    --text-muted:      #64748b;
    --border:          #E2E8F0;
    --shadow-card:     0 10px 30px -10px rgba(23,25,64,0.15), 0 4px 6px -4px rgba(23,25,64,0.05);
    --shadow-xl:       0 12px 48px rgba(0,0,0,0.10);
    --shadow-purple:   0 8px 32px rgba(116,113,217,0.30);
    --radius-card:     28px;
    --radius-md:       14px;
    --radius-sm:       10px;
    --transition:      0.25s ease;
}

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

/* ── BASE ───────────────────────────────────────── */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #C9E0FD 0%, #DDD9F5 100%);
    min-height: 100vh;
    overflow-x: hidden;
    color: var(--text-dark);
}

.nav-link-special {
    display: flex;
    flex-direction: row;
    text-decoration: none;
}

.nav-link-special:hover {
    scale: 1.05;
}


/* ── LAYOUT ─────────────────────────────────────── */
.page-container {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 110px 32px 80px;
}

/* ── PAGE HEADER ────────────────────────────────── */
.page-header {
    position: relative;
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 40px;
    z-index: 3;
}

.page-title-block h1 {
    font-family: 'Sora', sans-serif;
    font-size: clamp(24px, 4vw, 34px);
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1.2;
}

.page-title-block p {
    font-size: 16px;
    color: var(--text-muted);
    margin-top: 6px;
}

/* ── CONTEST CARD ───────────────────────────────── */
.contest-card {
    background: white;
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    margin-bottom: 32px;
    border: 1.5px solid rgba(116,113,217,0.12);
    transition: box-shadow var(--transition);
}

.contest-card:hover {
    box-shadow: 0 20px 60px rgba(116,113,217,0.18);
}

/* ── BANNER ─────────────────────────────────────── */
.contest-banner {
    background: linear-gradient(135deg, #5957C8 0%, #7471D9 40%, #3B82F6 100%);
    padding: 40px 48px;
    position: relative;
    overflow: hidden;
    color: white;
    /* Fix: isolate stacking context for pseudo-elements */
    isolation: isolate;
}

.contest-banner::before {
    content: '';
    position: absolute;
    top: -60px; right: -60px;
    width: 320px; height: 320px;
    background: radial-gradient(circle, rgba(255,255,255,0.12) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
    pointer-events: none;
}

.contest-banner::after {
    content: '';
    position: absolute;
    bottom: -80px; left: 30%;
    width: 250px; height: 250px;
    background: radial-gradient(circle, rgba(255,255,255,0.07) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
    pointer-events: none;
}

.banner-content {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 24px;
    flex-wrap: wrap;
}

.banner-left {
    flex: 1;
    min-width: 0;
}

.contest-badge-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.badge-active {
    background: rgba(16,185,129,0.25);
    color: #6EE7B7;
    border: 1px solid rgba(110,231,183,0.4);
}

.badge-free {
    background: rgba(251,191,36,0.25);
    color: #FDE68A;
    border: 1px solid rgba(253,230,138,0.4);
}

.contest-banner h2 {
    font-family: 'Sora', sans-serif;
    font-size: clamp(20px, 3vw, 30px);
    font-weight: 800;
    color: white;
    line-height: 1.25;
    margin-bottom: 10px;
}

.contest-banner .subtitle {
    font-size: 15px;
    color: rgba(255,255,255,0.78);
}

.dates-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 24px;
}

.date-chip {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 12px;
    padding: 10px 16px;
    flex-shrink: 0;
}

.date-chip i {
    font-size: 16px;
    color: rgba(255,255,255,0.85);
    flex-shrink: 0;
}

.date-chip-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: rgba(255,255,255,0.65);
    line-height: 1;
    margin-bottom: 2px;
    white-space: nowrap;
}

.date-chip-value {
    font-size: 14px;
    font-weight: 700;
    color: white;
    white-space: nowrap;
}

.banner-cta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
    flex-shrink: 0;
}

.register-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 28px;
    background: white;
    color: var(--purple);
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), color var(--transition);
    box-shadow: 0 8px 24px rgba(0,0,0,0.18);
    white-space: nowrap;
}

.register-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 32px rgba(0,0,0,0.22);
    color: var(--purple-hover);
}

.register-btn:focus-visible {
    outline: 3px solid white;
    outline-offset: 3px;
}

.deadline-note {
    font-size: 12px;
    color: rgba(255,255,255,0.7);
    text-align: right;
}

.deadline-note strong { color: #FDE68A; }

/* ── COUNTDOWN ──────────────────────────────────── */
.countdown-strip {
    background: linear-gradient(90deg, #F8FAFC 0%, #EEF2FF 100%);
    border-bottom: 1px solid var(--border);
    padding: 20px 48px;
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.countdown-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.countdown-units {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}

.countdown-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: white;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 14px;
    min-width: 58px;
}

.countdown-num {
    font-family: 'Sora', sans-serif;
    font-size: 22px;
    font-weight: 800;
    color: var(--purple);
    line-height: 1;
}

.countdown-sub {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-top: 3px;
}

.progress-to-contest {
    flex: 1;
    min-width: 160px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.progress-track {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--purple) 0%, var(--blue) 100%);
    border-radius: 3px;
    transition: width 1.5s cubic-bezier(.4,0,.2,1);
}

.progress-caption {
    font-size: 11px;
    color: var(--text-muted);
}

/* ── CONTEST BODY / TABS ────────────────────────── */
.contest-body {
    padding: 40px 48px;
    position: relative;
    background: linear-gradient(90deg, #F8FAFC 0%, #EEF2FF 100%);
    z-index: 1;
}

.tabs-nav {
    display: flex;
    gap: 4px;
    background: #F1F5F9;
    border-radius: var(--radius-md);
    padding: 5px;
    margin-bottom: 36px;
    width: fit-content;
    flex-wrap: wrap;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.tab-btn:hover:not(.active) {
    background: rgba(255,255,255,0.6);
    color: var(--text-dark);
}

.tab-btn.active {
    background: white;
    color: var(--purple);
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.tab-btn:focus-visible {
    outline: 2px solid var(--purple);
    outline-offset: 2px;
}

.tab-btn i { font-size: 15px; }

.tab-panel {
    display: none;
    animation: fadeUp 0.3s ease;
}

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

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── SECTION HEADING ────────────────────────────── */
.section-heading {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.section-heading-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--purple), var(--blue));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    flex-shrink: 0;
}

.section-heading h3 {
    font-family: 'Sora', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
}

/* ── CHARITY NOTE ───────────────────────────────── */
.charity-note {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: linear-gradient(135deg, #FEF3C7, #FDE68A);
    border-radius: var(--radius-md);
    padding: 18px 24px;
    margin-bottom: 28px;
    border: 1px solid rgba(217,119,6,0.2);
}

.charity-note i {
    font-size: 24px;
    color: #D97706;
    flex-shrink: 0;
    margin-top: 2px;
}

.charity-note p {
    font-size: 13px;
    color: #78350F;
    line-height: 1.6;
}

.charity-note a {
    color: #D97706;
    font-weight: 600;
    text-underline-offset: 2px;
}

.charity-note a:hover { color: #B45309; }

/* ── INFO CARDS GRID ────────────────────────────── */
.overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 36px;
}

.info-card {
    background: var(--bg-sidebar);
    border: 1.5px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.info-card:hover {
    border-color: var(--purple);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(116,113,217,0.12);
}

.info-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 14px;
}

.info-card-icon.purple { background: linear-gradient(135deg,#EDE9FE,#DDD6FE); color: #6D28D9; }
.info-card-icon.blue   { background: linear-gradient(135deg,#DBEAFE,#BFDBFE); color: #1D4ED8; }
.info-card-icon.green  { background: linear-gradient(135deg,#D1FAE5,#A7F3D0); color: #059669; }
.info-card-icon.orange { background: linear-gradient(135deg,#FEF3C7,#FDE68A); color: #D97706; }

.info-card h4 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.info-card p,
.info-card ul {
    font-size: 14px;
    color: var(--text-dark);
    line-height: 1.65;
}

.info-card ul {
    padding-left: 16px;
    list-style: disc;
}

.info-card ul li { margin-bottom: 4px; }

.who-blocks {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

.who-block {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid transparent;
}

.who-block-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
}

.who-block-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.who-block-title {
    font-size: 13px;
    font-weight: 700;
    line-height: 1.3;
}

.who-block-sub {
    font-size: 11px;
    margin-top: 1px;
    opacity: 0.75;
}

.who-block-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 12px 14px 12px 56px;
}

.who-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
}

.who-tag i { font-size: 10px; }

/* SP – zielony */
.who-sp { border-color: #A7F3D0; }
.who-sp .who-block-header { background: #D1FAE5; }
.who-sp .who-block-icon { background: #A7F3D0; color: #065F46; }
.who-sp .who-block-title { color: #064E3B; }
.who-sp .who-block-sub { color: #047857; }
.who-sp .who-block-tags { background: #F0FDF9; }
.who-sp .who-tag { background: #A7F3D0; color: #064E3B; }

/* Średnia – fioletowy */
.who-sr { border-color: #C4B5FD; }
.who-sr .who-block-header { background: #EDE9FE; }
.who-sr .who-block-icon { background: #DDD6FE; color: #4C1D95; }
.who-sr .who-block-title { color: #2E1065; }
.who-sr .who-block-sub { color: #5B21B6; }
.who-sr .who-block-tags { background: #F5F3FF; }
.who-tag-p { background: #DDD6FE; color: #3730A3; }
.who-tag-r { background: #C4B5FD; color: #2E1065; }

/* ── STEPS TIMELINE ─────────────────────────────── */
.steps-section { margin-bottom: 36px; }

.steps-timeline {
    position: relative;
    display: flex;
    flex-direction: column;
    list-style: none;
    padding: 0;
}

.steps-timeline::before {
    content: '';
    position: absolute;
    left: 23px;
    top: 24px;
    bottom: 24px;
    width: 2px;
    background: linear-gradient(180deg, var(--purple) 0%, var(--blue) 100%);
    opacity: 0.25;
    pointer-events: none;
}

.step-row {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 18px 0;
    position: relative;
}

.step-num {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--purple), var(--purple-hover));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Sora', sans-serif;
    font-size: 16px;
    font-weight: 800;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 12px rgba(116,113,217,0.35);
}

.step-content {
    padding-top: 10px;
    flex: 1;
    min-width: 0;
}

.step-content h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.step-content p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.65;
}

.step-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 6px;
}

.step-tag.teacher  { background: #DBEAFE; color: #1D4ED8; }
.step-tag.student  { background: #D1FAE5; color: #065F46; }
.step-tag.platform { background: #EDE9FE; color: #5B21B6; }
.step-tag.omr      { background: #FEF3C7; color: #92400E; }

.omr-highlight {
    background: linear-gradient(135deg, #EEF2FF 0%, #F5F3FF 100%);
    border: 1.5px solid rgba(116,113,217,0.2);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-top: 10px;
}

.omr-highlight-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--purple), var(--blue));
    border-radius: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: white;
    flex-shrink: 0;
}

.omr-highlight p {
    font-size: 13px;
    color: var(--text-dark);
    line-height: 1.65;
}

.omr-highlight strong { color: var(--purple); }

/* ── METHOD SELECTOR ────────────────────────────── */
.method-selector {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-bottom: 32px;
}
 
.method-btn {
    background: var(--bg-main);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0;
    cursor: pointer;
    text-align: left;
    font-family: 'Inter', sans-serif;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
 
.method-btn:hover:not(.active) {
    border-color: var(--purple);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(116,113,217,.10);
}
 
.method-btn.active {
    border-color: var(--purple);
    border-width: 2px;
    box-shadow: 0 4px 20px rgba(116,113,217,.18);
}
 
.method-btn:focus-visible {
    outline: 2px solid var(--purple);
    outline-offset: 2px;
}
 
.method-btn-top {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 18px 12px;
}
 
.method-btn-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 18px;
}
 
.method-btn-icon.purple { background: #EDE9FE; color: #6D28D9; }
.method-btn-icon.blue   { background: #DBEAFE; color: #1D4ED8; }
.method-btn-icon.red    { background: #FEE2E2; color: #B91C1C; }
 
.method-btn-text { min-width: 0; }
 
.method-btn-label {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.3;
}
 
.method-btn-sub {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
    line-height: 1.4;
}
 
.method-btn-badge {
    display: inline-block;
    font-size: 10px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 20px;
    margin: 0 18px 16px;
    width: fit-content;
    letter-spacing: .3px;
    text-transform: uppercase;
    transition: background var(--transition), color var(--transition);
}
 
.method-btn:not(.active) .method-btn-badge {
    background: #F1F5F9;
    color: var(--text-muted);
}
 
.method-btn.active .method-btn-badge {
    background: linear-gradient(135deg, var(--purple), var(--blue));
    color: #fff;
}

.steps-panel {
    animation: stepsFadeUp .3s ease;
}
 
@keyframes stepsFadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}
 
.rodo-warn {
    background: linear-gradient(135deg, #FEF3C7, #FDE68A20);
    border: 1.5px solid rgba(217,119,6,.25);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    margin-top: 10px;
    font-size: 13px;
    color: #78350F;
    line-height: 1.65;
}
 
.rodo-warn strong { color: #B45309; }
.step-tag.rodo { background: #FEE2E2; color: #B91C1C; }
 
@media (max-width: 900px) {
    .method-selector { grid-template-columns: 1fr; }
}
 
@media (max-width: 768px) {
    .method-selector { gap: 10px; margin-bottom: 24px; }
    .method-btn-top { padding: 14px 14px 10px; gap: 10px; }
    .method-btn-badge { margin: 0 14px 12px; }
}

/* ── TEACHER CARDS ──────────────────────────────── */
.teacher-section { margin-bottom: 32px; }

.teacher-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 16px;
}

.teacher-card {
    background: var(--bg-sidebar);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.teacher-card:hover {
    border-color: var(--purple);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(116,113,217,0.10);
}

.teacher-card-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.teacher-card-icon.green  { background: #D1FAE5; color: #059669; }
.teacher-card-icon.blue   { background: #DBEAFE; color: #1D4ED8; }
.teacher-card-icon.orange { background: #FEF3C7; color: #D97706; }
.teacher-card-icon.purple { background: #EDE9FE; color: #6D28D9; }
.teacher-card-icon.teal   { background: #CCFBF1; color: #0D9488; }
.teacher-card-icon.red    { background: #FEE2E2; color: #DC2626; }

.teacher-card h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.teacher-card p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.55;
}

.important-note {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    background: linear-gradient(135deg, #EFF6FF, #DBEAFE);
    border: 1.5px solid #BFDBFE;
    border-radius: var(--radius-md);
    padding: 18px 20px;
    margin-top: 16px;
}

.important-note i {
    font-size: 20px;
    color: #1D4ED8;
    flex-shrink: 0;
    margin-top: 2px;
}

.important-note p {
    font-size: 13px;
    color: #1E3A5F;
    line-height: 1.6;
}

/* ── REGISTER BAR ───────────────────────────────── */
.register-bar {
    background: linear-gradient(135deg, var(--purple) 0%, var(--blue) 100%);
    border-radius: 20px;
    padding: 28px 36px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    box-shadow: var(--shadow-purple);
}

.register-bar-text h3 {
    font-family: 'Sora', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: white;
    margin-bottom: 4px;
}

.register-bar-text p {
    font-size: 14px;
    color: rgba(255,255,255,0.75);
}

.register-bar-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    flex-shrink: 0;
}

.btn-white {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    background: white;
    color: var(--purple);
    border: none;
    border-radius: 12px;
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    white-space: nowrap;
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.btn-white:focus-visible {
    outline: 3px solid white;
    outline-offset: 3px;
}

/* ══════════════════════════════════════
   REGULAMIN
══════════════════════════════════════ */
.rules-top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.pdf-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--purple), var(--purple-hover));
    color: white;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 4px 12px rgba(116,113,217,0.3);
}

.pdf-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(116,113,217,0.4);
    color: white;
}

.pdf-download-btn:focus-visible {
    outline: 2px solid var(--purple);
    outline-offset: 3px;
}

.rule-item {
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    overflow: hidden;
    transition: border-color 0.2s;
}

.rule-item.open { border-color: var(--purple); }

.rule-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    cursor: pointer;
    background: #FAFAFA;
    transition: background 0.2s;
    /* Changed from div to button — reset button styles */
    border: none;
    width: 100%;
    text-align: left;
    font-family: 'Inter', sans-serif;
}

.rule-header:hover { background: #F1F5F9; }

.rule-item.open .rule-header { background: #F5F3FF; }

.rule-header:focus-visible {
    outline: 2px solid var(--purple);
    outline-offset: -2px;
}

.rule-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.rule-num {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--purple), var(--purple-hover));
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}

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

.rule-chevron {
    font-size: 14px;
    color: var(--text-muted);
    transition: transform 0.25s ease;
    flex-shrink: 0;
}

.rule-item.open .rule-chevron { transform: rotate(180deg); }

.rule-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(.4,0,.2,1);
}

/* FIX: increased max-height so longer content isn't clipped */
.rule-item.open .rule-body { max-height: 1200px; }

.rule-body-inner {
    padding: 16px 20px 20px 60px;
    font-size: 14px;
    color: var(--text-dark);
    line-height: 1.75;
    border-top: 1px solid var(--border);
}

.rule-body-inner ul {
    list-style: none;
    padding: 0;
}

.rule-body-inner ul li {
    padding: 4px 0 4px 20px;
    position: relative;
}

.rule-body-inner ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--purple);
    font-weight: 700;
}

.rules-bottom-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 24px;
}

/* ══════════════════════════════════════
   ZAKRES ZADAŃ
══════════════════════════════════════ */
.topics-download-boxes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 36px;
}

.topic-download-box {
    border-radius: 20px;
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.topic-download-box::after {
    content: '';
    position: absolute;
    top: -40px; right: -40px;
    width: 180px; height: 180px;
    border-radius: 50%;
    opacity: 0.15;
    pointer-events: none;
    z-index: 0;
}

.topic-download-box.sp {
    background: linear-gradient(135deg, #ECFDF5 0%, #D1FAE5 100%);
    border: 2px solid #6EE7B7;
}

.topic-download-box.sp::after { background: #059669; }

.topic-download-box.sp:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(5,150,105,0.22);
    border-color: #059669;
}

.topic-download-box.sr {
    background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
    border: 2px solid #93C5FD;
}

.topic-download-box.sr::after { background: #1D4ED8; }

.topic-download-box.sr:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(29,78,216,0.18);
    border-color: #3B82F6;
}

.topic-download-box:focus-visible {
    outline: 3px solid var(--purple);
    outline-offset: 3px;
}

.tdb-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.topic-download-box.sp .tdb-icon {
    background: linear-gradient(135deg, #059669, #10B981);
    color: white;
    box-shadow: 0 6px 16px rgba(5,150,105,0.35);
}

.topic-download-box.sr .tdb-icon {
    background: linear-gradient(135deg, #1D4ED8, #3B82F6);
    color: white;
    box-shadow: 0 6px 16px rgba(29,78,216,0.35);
}

.tdb-text { position: relative; z-index: 1; }

.tdb-text h3 {
    font-family: 'Sora', sans-serif;
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 5px;
}

.topic-download-box.sp .tdb-text h3 { color: #064E3B; }
.topic-download-box.sr .tdb-text h3 { color: #1E3A5F; }

.tdb-text p { font-size: 13px; line-height: 1.5; }

.topic-download-box.sp .tdb-text p { color: #065F46; }
.topic-download-box.sr .tdb-text p { color: #1D4ED8; }

.tdb-levels {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    position: relative;
    z-index: 1;
}

.tdb-level-badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}

.topic-download-box.sp .tdb-level-badge { background: rgba(5,150,105,0.15); color: #064E3B; }
.topic-download-box.sr .tdb-level-badge { background: rgba(29,78,216,0.12);  color: #1E3A5F; }

.tdb-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
    padding-top: 14px;
    /* FIX: border shorthand needs color */
    border-top: 1px dashed transparent;
    margin-top: 4px;
}

.topic-download-box.sp .tdb-footer { border-top-color: rgba(5,150,105,0.3); }
.topic-download-box.sr .tdb-footer { border-top-color: rgba(29,78,216,0.2); }

.tdb-footer-text {
    font-size: 13px;
    font-weight: 700;
}

.topic-download-box.sp .tdb-footer-text { color: #059669; }
.topic-download-box.sr .tdb-footer-text { color: #1D4ED8; }

.tdb-download-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: transform 0.2s ease;
}

.topic-download-box.sp .tdb-download-icon { background: rgba(5,150,105,0.15); color: #059669; }
.topic-download-box.sr .tdb-download-icon { background: rgba(29,78,216,0.12); color: #1D4ED8; }

.topic-download-box:hover .tdb-download-icon {
    transform: scale(1.18) translateY(2px);
}

/* ── COMING SOON / SAMPLE TASKS ─────────────────── */
.coming-soon-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 8px 16px;
    font-size: 13px;
    background: #F1F5F9;
    border: 1.5px dashed #CBD5E1;
    border-radius: 8px;
    color: var(--text-muted);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.coming-soon-badge:hover {
    background: #EDE9FE;
    border-color: var(--purple);
    color: var(--purple);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(116, 113, 217, 0.18);
}

.tasks-coming {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 32px;
    background: linear-gradient(135deg, #F8FAFC, #EEF2FF);
    border: 2px dashed #CBD5E1;
    border-radius: 20px;
    text-align: center;
    gap: 16px;
}

.tasks-coming-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, #EDE9FE, #DDD6FE);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: #6D28D9;
}

.tasks-coming h3 {
    font-family: 'Sora', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
}

.tasks-coming p {
    font-size: 14px;
    color: var(--text-muted);
    max-width: 440px;
    line-height: 1.6;
}

/* ══════════════════════════════════════
   MATERIAŁY DO POBRANIA
══════════════════════════════════════ */
.materials-intro {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.6;
}

.materials-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

.material-card {
    border-radius: 20px;
    overflow: hidden;
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    background: white;
}

.material-card:hover {
    transform: translateY(-4px);
}

.material-card.material-sp {
    border-color: #6EE7B7;
    box-shadow: 0 4px 16px rgba(5, 150, 105, 0.10);
}

.material-card.material-sp:hover {
    border-color: #059669;
    box-shadow: 0 12px 32px rgba(5, 150, 105, 0.20);
}

.material-card.material-sr {
    border-color: #93C5FD;
    box-shadow: 0 4px 16px rgba(29, 78, 216, 0.10);
}

.material-card.material-sr:hover {
    border-color: #3B82F6;
    box-shadow: 0 12px 32px rgba(29, 78, 216, 0.18);
}

.material-card-header {
    position: relative;
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.material-card.material-sp .material-card-header {
    background: linear-gradient(135deg, #ECFDF5, #D1FAE5);
}

.material-card.material-sr .material-card-header {
    background: linear-gradient(135deg, #EFF6FF, #DBEAFE);
}

.material-card-icon {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    background: linear-gradient(135deg, #059669, #10B981);
    color: white;
    box-shadow: 0 8px 20px rgba(5, 150, 105, 0.35);
    position: relative;
    z-index: 1;
}

.material-card-icon.material-card-icon-sr {
    background: linear-gradient(135deg, #1D4ED8, #3B82F6);
    box-shadow: 0 8px 20px rgba(29, 78, 216, 0.35);
}

.material-preview {
    position: absolute;
    bottom: 10px;
    right: 12px;
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
}

.material-preview-sp {
    background: rgba(5, 150, 105, 0.15);
    color: #065F46;
}

.material-preview-sr {
    background: rgba(29, 78, 216, 0.12);
    color: #1E3A5F;
}

.material-card-body {
    padding: 20px 20px 12px;
    flex: 1;
}

.material-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.material-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    background: #D1FAE5;
    color: #065F46;
}

.material-tag.material-tag-sr {
    background: #DBEAFE;
    color: #1E3A5F;
}

.material-card-body h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.material-card-body p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.55;
}

.material-download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 0 20px 20px;
    padding: 12px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s ease;
}

.material-download-sp {
    background: linear-gradient(135deg, #059669, #10B981);
    color: white;
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.30);
}

.material-download-sp:hover {
    box-shadow: 0 8px 20px rgba(5, 150, 105, 0.45);
    transform: translateY(-1px);
    color: white;
}

.material-download-sr {
    background: linear-gradient(135deg, #1D4ED8, #3B82F6);
    color: white;
    box-shadow: 0 4px 12px rgba(29, 78, 216, 0.30);
}

.material-download-sr:hover {
    box-shadow: 0 8px 20px rgba(29, 78, 216, 0.45);
    transform: translateY(-1px);
    color: white;
}

.materials-note {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: linear-gradient(135deg, #FEF3C7, #FDE68A);
    border: 1px solid rgba(217, 119, 6, 0.2);
    border-radius: var(--radius-md);
    padding: 16px 20px;
}

.materials-note i {
    font-size: 18px;
    color: #D97706;
    flex-shrink: 0;
    margin-top: 2px;
}

.materials-note p {
    font-size: 13px;
    color: #78350F;
    line-height: 1.6;
}

.materials-note a {
    color: #D97706;
    font-weight: 600;
}

.materials-note a:hover { color: #B45309; }

/* Responsive */
@media (max-width: 768px) {
    .materials-grid {
        grid-template-columns: 1fr;
    }
}

/* ══════════════════════════════════════
   MOBILE BOTTOM NAV
══════════════════════════════════════ */
.mobile-bottom-nav { display: none; }

/* ══════════════════════════════════════
   RESPONSIVE – TABLET
══════════════════════════════════════ */
@media (max-width: 900px) {
    .overview-grid,
    .teacher-grid,
    .topics-download-boxes {
        grid-template-columns: 1fr;
    }
}

/* ══════════════════════════════════════
   RESPONSIVE – MOBILE
══════════════════════════════════════ */
@media (max-width: 768px) {
    .page-container {
        padding: 16px 16px 100px;
        padding-top: 90px;
    }

    .page-header {
        flex-direction: column;
        gap: 12px;
        margin-top: 20px;
    }

    /* Banner */
    .contest-banner {
        padding: 24px 20px;
    }

    .contest-banner h2 {
        font-size: 20px;
    }

    .banner-content {
        flex-direction: column;
        gap: 20px;
    }

    .banner-cta {
        align-items: flex-start;
        width: 100%;
    }

    .register-btn {
        width: 100%;
        justify-content: center;
    }

    .deadline-note {
        text-align: left;
    }

    .dates-row {
        flex-direction: column;
        gap: 8px;
    }

    .date-chip {
        width: 100%;
    }

    /* Countdown */
    .countdown-strip {
        padding: 14px 20px;
        gap: 12px;
    }

    .countdown-units {
        gap: 6px;
    }

    .countdown-unit {
        padding: 6px 10px;
        min-width: 48px;
    }

    .countdown-num { font-size: 18px; }

    .progress-to-contest {
        min-width: 100%;
        margin-top: 4px;
    }

    /* Body */
    .contest-body {
        padding: 20px 16px;
    }

    .tabs-nav {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tab-btn {
        padding: 8px 14px;
        font-size: 13px;
        flex-shrink: 0;
    }

    /* Register bar */
    .register-bar {
        flex-direction: column;
        align-items: flex-start;
        padding: 24px 20px;
    }

    .register-bar-actions {
        width: 100%;
    }

    .btn-white {
        width: 100%;
        justify-content: center;
    }

    /* Rules */
    .rules-top-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .rule-body-inner {
        padding-left: 20px;
    }

    /* Steps */
    .steps-timeline::before { display: none; }

    .step-row { gap: 14px; }

    .step-num {
        width: 40px;
        height: 40px;
        font-size: 14px;
    }

    /* Teacher cards */
    .teacher-card {
        flex-direction: row;
    }

    /* Topics */
    .topic-download-box {
        padding: 20px;
    }

    /* Mobile nav */
    .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: rgba(255,255,255,0.96);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        padding: 14px 20px;
        padding-bottom: calc(14px + env(safe-area-inset-bottom));
        box-shadow: 0 -8px 24px rgba(0,0,0,0.08);
        z-index: 200;
        justify-content: center;
        gap: 12px;
        border-top: 1px solid rgba(0,0,0,0.06);
    }

    .mobile-nav-btn {
        flex: 1;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 14px;
        border-radius: 12px;
        font-family: 'Inter', sans-serif;
        font-size: 14px;
        font-weight: 600;
        text-decoration: none;
        background: #F1F5F9;
        color: var(--text-dark);
        border: 1.5px solid var(--border);
        transition: all 0.2s ease;
        cursor: pointer;
    }

    .mobile-nav-btn:hover {
        background: #E2E8F0;
    }

    .mobile-nav-btn.primary-mobile {
        background: linear-gradient(135deg, var(--purple), var(--purple-hover));
        color: white;
        border-color: transparent;
    }

    .mobile-nav-btn.primary-mobile:hover {
        opacity: 0.9;
    }

    .mobile-nav-btn:focus-visible {
        outline: 2px solid var(--purple);
        outline-offset: 2px;
    }
}