/* ==========================================================================
   PRC 30-Day Challenge — Participant-facing stylesheet
   Covers: Landing/Login, Leaderboard, Dashboard, Certificate verify page
   Requires: Bootstrap 5.3, Bootstrap Icons 1.11
   ========================================================================== */

/* ── Design Tokens ───────────────────────────────────────────────────────── */
:root {
    --prc-navy:       #0F1923;
    --prc-navy-card:  #162030;
    --prc-navy-light: #1E2E42;
    --prc-navy-deep:  #0a1219;
    --prc-blue:       #2F6FEB;
    --prc-blue-hover: #2560d8;
    --prc-yellow:     #F0C040;
    --prc-green:      #22c55e;
    --prc-red:        #ef4444;
    --prc-text:       #E8EDF2;
    --prc-muted:      #7A90A8;
    --prc-muted-dark: #4a7aaa;
    --prc-border:     rgba(255,255,255,0.07);
    --prc-border-blue: rgba(47,111,235,0.3);
    --prc-silver:     #9CA3AF;
    --prc-bronze:     #B45309;
    --tier-gold:      #D28C1E;
    --tier-silver:    #82A0B0;
    --tier-bronze:    #A25214;
    --strava:         #FC4C02;
}

/* ── Base ────────────────────────────────────────────────────────────────── */
body {
    background: var(--prc-navy);
    color: var(--prc-text);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
}

/* ── Navbar ──────────────────────────────────────────────────────────────── */
.prc-navbar {
    background: var(--prc-navy-deep);
    border-bottom: 1px solid var(--prc-border-blue);
    padding: 0.75rem 0;
}
.prc-navbar .navbar-brand img { height: 36px; }
.prc-navbar .nav-link {
    color: #8aafd4;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.3rem 0.9rem;
}
.prc-navbar .nav-link:hover { color: #fff; }
.prc-navbar .nav-link.active {
    color: var(--prc-yellow);
    border-bottom: 2px solid var(--prc-yellow);
}
/* Dashboard navbar variant (bg = navy-card, no uppercase) */
.prc-navbar.dash-nav {
    background: var(--prc-navy-card);
    border-bottom: 1px solid var(--prc-border);
    padding: 0;
}
.prc-navbar.dash-nav .nav-link {
    color: var(--prc-muted);
    font-size: 0.9rem;
    text-transform: none;
    letter-spacing: normal;
    padding: 0.5rem 0.9rem;
}
.prc-navbar.dash-nav .nav-link:hover,
.prc-navbar.dash-nav .nav-link.active { color: var(--prc-text); }
.prc-navbar .user-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--prc-blue);
}

/* ── Page Header (Leaderboard) ───────────────────────────────────────────── */
.page-header {
    background: linear-gradient(135deg, var(--prc-navy-deep) 0%, var(--prc-navy) 60%, #132236 100%);
    border-bottom: 1px solid var(--prc-border-blue);
    padding: 1.75rem 0 1.25rem;
}
.page-title {
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.sub-label {
    font-size: 0.72rem;
    color: var(--prc-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

/* ── Progress Bar ────────────────────────────────────────────────────────── */
.prc-progress {
    height: 10px;
    border-radius: 5px;
    background: var(--prc-navy-light);
    overflow: hidden;
}
.prc-progress.slim { height: 5px; max-width: 280px; margin-top: 0.4rem; }
.prc-progress-bar {
    height: 100%;
    border-radius: 5px;
    background: linear-gradient(90deg, var(--prc-blue) 0%, #5b9bff 100%);
    transition: width 0.6s ease;
}
.prc-progress.slim .prc-progress-bar {
    background: linear-gradient(90deg, var(--prc-blue), var(--prc-yellow));
}

/* ── Stat Pills (Leaderboard header) ─────────────────────────────────────── */
.stat-pill {
    background: rgba(47,111,235,0.1);
    border: 1px solid rgba(47,111,235,0.22);
    border-radius: 8px;
    padding: 0.45rem 0.9rem;
    text-align: center;
}
.stat-pill .n { font-size: 1.35rem; font-weight: 800; color: var(--prc-yellow); line-height: 1; }
.stat-pill .l { font-size: 0.62rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--prc-muted); }

/* ── Stat Cards (Dashboard) ──────────────────────────────────────────────── */
.stat-card {
    background: var(--prc-navy-card);
    border: 1px solid var(--prc-border);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}
.stat-icon {
    width: 52px; height: 52px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}
.stat-icon.blue   { background: rgba(47,111,235,0.15); color: var(--prc-blue); }
.stat-icon.green  { background: rgba(34,197,94,0.15);  color: var(--prc-green); }
.stat-icon.yellow { background: rgba(240,192,64,0.15); color: var(--prc-yellow); }
.stat-icon.purple { background: rgba(168,85,247,0.15); color: #a855f7; }
.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1;
    color: var(--prc-text);
}
.stat-label {
    font-size: 0.78rem;
    color: var(--prc-muted);
    margin-top: 2px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ── Generic card ────────────────────────────────────────────────────────── */
.prc-card {
    background: var(--prc-navy-card);
    border: 1px solid var(--prc-border);
    border-radius: 12px;
}

/* ── Section headings ────────────────────────────────────────────────────── */
.section-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--prc-muted);
    margin-bottom: 1rem;
    display: flex; align-items: center; gap: 8px;
}
.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--prc-border);
}
/* Leaderboard variant */
.section-heading {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--prc-muted);
}

/* ── Empty state ─────────────────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--prc-muted);
}
.empty-state i { font-size: 2.5rem; opacity: 0.4; }
.lb-empty { padding: 2.5rem 1rem; text-align: center; color: var(--prc-muted); }

/* ============================================================================
   LEADERBOARD
   ============================================================================ */

/* ── Podium (top 3) ──────────────────────────────────────────────────────── */
.podium-section { padding: 1.4rem 0 0.5rem; }
.podium-card {
    border-radius: 12px;
    padding: 1.2rem 0.8rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.podium-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
}
.p1 { background: rgba(240,192,64,0.09); border: 1px solid rgba(240,192,64,0.35); }
.p1::before { background: var(--prc-yellow); }
.p2 { background: rgba(156,163,175,0.07); border: 1px solid rgba(156,163,175,0.25); }
.p2::before { background: var(--prc-silver); }
.p3 { background: rgba(180,83,9,0.07); border: 1px solid rgba(180,83,9,0.3); }
.p3::before { background: var(--prc-bronze); }

.podium-icon { font-size: 1.55rem; line-height: 1; }
.podium-avatar {
    width: 50px; height: 50px;
    border-radius: 50%; object-fit: cover;
    margin: 0.35rem auto; display: block;
}
.podium-placeholder {
    width: 50px; height: 50px; border-radius: 50%;
    background: rgba(47,111,235,0.2);
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem; font-weight: 700;
    margin: 0.35rem auto;
}
.podium-name  { font-size: 0.85rem; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.podium-score { font-size: 1.1rem; font-weight: 800; line-height: 1; }
.p1 .podium-score { color: var(--prc-yellow); }
.p2 .podium-score { color: var(--prc-silver); }
.p3 .podium-score { color: var(--prc-bronze); }
.podium-meta  { font-size: 0.68rem; color: var(--prc-muted); margin-top: 0.1rem; }

/* ── Leaderboard table ───────────────────────────────────────────────────── */
.lb-section { padding: 0.8rem 0 3rem; }
.lb-toolbar {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 0.6rem; flex-wrap: wrap; gap: 0.4rem;
}
.lb-updated { font-size: 0.7rem; color: var(--prc-muted); }
.lb-updated .dot {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--prc-green);
    display: inline-block;
    animation: pulse 2s infinite;
    margin-right: 3px;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.25} }

.lb-wrap {
    background: #1A2B3C;
    border: 1px solid var(--prc-border-blue);
    border-radius: 12px;
    overflow: hidden;
}
.lb-table { margin: 0; font-size: 0.86rem; }
.lb-table thead th {
    background: var(--prc-navy-deep);
    border-bottom: 1px solid var(--prc-border-blue);
    color: var(--prc-muted);
    font-size: 0.66rem; font-weight: 700;
    letter-spacing: 0.1em; text-transform: uppercase;
    padding: 0.7rem 1rem; white-space: nowrap;
}
.lb-table tbody tr { border-bottom: 1px solid rgba(47,111,235,0.1); transition: background 0.12s; }
.lb-table tbody tr:last-child { border-bottom: none; }
.lb-table tbody tr:hover { background: rgba(47,111,235,0.05); }
.lb-table tbody td { padding: 0.7rem 1rem; vertical-align: middle; color: #fff; }
.lb-table tbody tr.my-row { background: rgba(47,111,235,0.1); border-left: 3px solid var(--prc-blue); }

/* ── Rank badge ──────────────────────────────────────────────────────────── */
.rank-badge {
    width: 30px; height: 30px; border-radius: 7px;
    display: inline-flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 0.8rem;
}
.rb-1 { background: rgba(240,192,64,0.18); color: var(--prc-yellow); border: 1px solid rgba(240,192,64,0.45); }
.rb-2 { background: rgba(156,163,175,0.12); color: var(--prc-silver); border: 1px solid rgba(156,163,175,0.35); }
.rb-3 { background: rgba(180,83,9,0.12); color: var(--prc-bronze); border: 1px solid rgba(180,83,9,0.35); }
.rb-n { background: rgba(47,111,235,0.08); color: #8aafd4; border: 1px solid rgba(47,111,235,0.18); }

/* ── Rank change ─────────────────────────────────────────────────────────── */
.chg { font-size: 0.68rem; font-weight: 700; white-space: nowrap; }
.chg-up   { color: var(--prc-green); }
.chg-down { color: var(--prc-red); }
.chg-same { color: #374151; }
.rank-up   { color: var(--prc-green); }
.rank-down { color: var(--prc-red); }
.rank-same { color: var(--prc-muted); }

/* ── Participant cell ────────────────────────────────────────────────────── */
.ptc { display: flex; align-items: center; gap: 0.6rem; }
.ptc-avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.ptc-ph {
    width: 32px; height: 32px; border-radius: 50%;
    background: rgba(47,111,235,0.18);
    display: inline-flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.75rem; color: #8aafd4; flex-shrink: 0;
}
.ptc-name { font-weight: 600; font-size: 0.86rem; line-height: 1.1; }
.ptc-reg  { font-size: 0.65rem; color: var(--prc-muted); }

/* ── Days cell ───────────────────────────────────────────────────────────── */
.dc .dc-n { font-size: 1rem; font-weight: 800; color: var(--prc-blue); line-height: 1; }
.dc .dc-bar { width: 55px; height: 4px; background: rgba(47,111,235,0.15); border-radius: 2px; margin-top: 3px; overflow: hidden; }
.dc .dc-fill { height: 100%; border-radius: 2px; background: var(--prc-blue); }
.dc.done .dc-n   { color: var(--prc-yellow); }
.dc.done .dc-fill { background: var(--prc-yellow); }

/* ── Minutes cell ────────────────────────────────────────────────────────── */
.mc { font-size: 0.92rem; font-weight: 700; color: #c8d9ff; white-space: nowrap; }
.mc .u { font-size: 0.65rem; font-weight: 400; color: var(--prc-muted); margin-left: 1px; }

/* ── Streak cell ─────────────────────────────────────────────────────────── */
.sc { display: flex; align-items: center; gap: 0.3rem; font-weight: 700; font-size: 0.88rem; white-space: nowrap; }
.sc-0   { color: #374151; }
.sc-low { color: var(--prc-muted); }
.sc-mid { color: var(--prc-blue); }
.sc-hot { color: var(--prc-yellow); }

/* ============================================================================
   DASHBOARD
   ============================================================================ */

/* ── Calendar Heatmap ────────────────────────────────────────────────────── */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 8px;
}
.cal-day {
    aspect-ratio: 1;
    border-radius: 8px;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    font-size: 0.75rem; font-weight: 600;
    position: relative; cursor: default;
    transition: transform 0.15s;
}
.cal-day:hover { transform: scale(1.08); z-index: 1; }
.cal-day .day-num { font-size: 0.85rem; font-weight: 700; }
.cal-day .day-min { font-size: 0.6rem; opacity: 0.85; margin-top: 2px; }

.cal-completed {
    background: rgba(34,197,94,0.2);
    border: 1px solid rgba(34,197,94,0.5);
    color: var(--prc-green);
}
.cal-missed {
    background: rgba(239,68,68,0.12);
    border: 1px solid rgba(239,68,68,0.3);
    color: #f87171;
}
.cal-today {
    background: rgba(47,111,235,0.25);
    border: 2px solid var(--prc-blue);
    color: #93bbff;
}
.cal-future {
    background: var(--prc-navy-light);
    border: 1px solid var(--prc-border);
    color: var(--prc-muted);
    opacity: 0.6;
}

/* ── Activity Table ──────────────────────────────────────────────────────── */
.prc-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}
.prc-table thead th {
    padding: 0.65rem 1rem;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--prc-muted);
    border-bottom: 1px solid var(--prc-border);
    white-space: nowrap;
}
.prc-table tbody tr { border-bottom: 1px solid var(--prc-border); transition: background 0.1s; }
.prc-table tbody tr:last-child { border-bottom: none; }
.prc-table tbody tr:hover { background: rgba(255,255,255,0.03); }
.prc-table td { padding: 0.75rem 1rem; font-size: 0.875rem; vertical-align: middle; }

/* ── Activity type badges ────────────────────────────────────────────────── */
.type-badge {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 10px; border-radius: 20px;
    font-size: 0.72rem; font-weight: 600; white-space: nowrap;
}
.type-Run   { background: rgba(34,197,94,0.15);  color: #4ade80; border: 1px solid rgba(34,197,94,0.3); }
.type-Walk  { background: rgba(96,165,250,0.15); color: #93c5fd; border: 1px solid rgba(96,165,250,0.3); }
.type-Ride  { background: rgba(251,191,36,0.15); color: #fbbf24; border: 1px solid rgba(251,191,36,0.3); }
.type-Swim  { background: rgba(34,211,238,0.15); color: #22d3ee; border: 1px solid rgba(34,211,238,0.3); }
.type-Yoga  { background: rgba(167,139,250,0.15);color: #a78bfa; border: 1px solid rgba(167,139,250,0.3); }
.type-Hike  { background: rgba(251,146,60,0.15); color: #fb923c; border: 1px solid rgba(251,146,60,0.3); }
.type-Other { background: rgba(148,163,184,0.15);color: #94a3b8; border: 1px solid rgba(148,163,184,0.3); }

.badge-valid   { background: rgba(34,197,94,0.15); color: #4ade80; font-size: 0.68rem; }
.badge-invalid { background: rgba(239,68,68,0.15); color: #f87171; font-size: 0.68rem; }

/* ── Finisher tier colours ───────────────────────────────────────────────── */
.finisher-gold   { color: #f59e0b; }
.finisher-silver { color: #94a3b8; }
.finisher-bronze { color: #b45309; }

/* ============================================================================
   LANDING / LOGIN PAGE
   ============================================================================ */

.hero-section {
    min-height: 100vh;
    display: flex; align-items: center;
    background:
        radial-gradient(ellipse 80% 60% at 50% 40%, rgba(47,111,235,0.12) 0%, transparent 70%),
        var(--prc-navy);
}

.login-card {
    background: #1A2B3C;
    border: 1px solid rgba(47,111,235,0.35);
    border-radius: 16px;
    padding: 2.5rem 2rem;
    max-width: 460px;
    width: 100%;
    margin: 0 auto;
    box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}

.prc-logo { width: 90px; height: 90px; object-fit: contain; }

.prc-title {
    font-size: 1.35rem; font-weight: 700;
    letter-spacing: 0.05em; text-transform: uppercase;
    color: #FFFFFF;
}

.prc-tagline {
    font-size: 0.7rem; letter-spacing: 0.18em;
    text-transform: uppercase; color: var(--prc-yellow); font-weight: 600;
}

.challenge-badge {
    background: rgba(47,111,235,0.15);
    border: 1px solid rgba(47,111,235,0.4);
    border-radius: 8px;
    padding: 0.65rem 1rem;
    font-size: 0.82rem;
    color: #c8d9ff;
}
.challenge-badge .badge-num {
    font-size: 2rem; font-weight: 800;
    color: var(--prc-yellow); line-height: 1;
}

/* ── Strava button ───────────────────────────────────────────────────────── */
.btn-strava {
    background: var(--strava);
    border: none; color: #fff;
    font-weight: 700; font-size: 1rem;
    padding: 0.8rem 1.5rem; border-radius: 8px;
    width: 100%; transition: background 0.2s, transform 0.1s;
    text-decoration: none;
    display: flex; align-items: center; justify-content: center; gap: 0.6rem;
}
.btn-strava:hover  { background: #e04300; color: #fff; transform: translateY(-1px); }
.btn-strava:active { transform: translateY(0); }
.btn-strava svg    { width: 22px; height: 22px; flex-shrink: 0; }

/* ── Rule items ──────────────────────────────────────────────────────────── */
.rule-item {
    display: flex; align-items: flex-start; gap: 0.5rem;
    font-size: 0.82rem; color: #a0b4cc; margin-bottom: 0.4rem;
}
.rule-item .rule-icon {
    color: var(--prc-yellow); font-size: 0.9rem;
    margin-top: 1px; flex-shrink: 0;
}

/* ── Alerts ──────────────────────────────────────────────────────────────── */
.prc-divider { border-color: rgba(47,111,235,0.35); margin: 1.25rem 0; }

.alert-prc-error {
    background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.4);
    color: #fca5a5; border-radius: 8px; font-size: 0.85rem;
}
.alert-prc-info {
    background: rgba(47,111,235,0.12); border: 1px solid rgba(47,111,235,0.4);
    color: #93c5fd; border-radius: 8px; font-size: 0.85rem;
}

.footer-note { font-size: 0.72rem; color: #4a6280; text-align: center; margin-top: 1.25rem; }

/* ============================================================================
   RESPONSIVE
   ============================================================================ */
@media (max-width: 767px) {
    .page-title       { font-size: 1.25rem; }
    .podium-section   { display: none; }
    .lb-table .d-none-sm { display: none !important; }
    .calendar-grid    { grid-template-columns: repeat(5, 1fr); gap: 6px; }
}
@media (max-width: 576px) {
    .stat-card { padding: 1rem; gap: 0.75rem; }
    .stat-value { font-size: 1.4rem; }
}