/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-hover: #273548;
    --border: #334155;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --success: #22c55e;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --warning: #f59e0b;
    --radius: 10px;
    --radius-lg: 16px;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== Login ===== */
.login-page { display: flex; align-items: center; justify-content: center; padding: 2rem; }
.login-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 3rem 2.5rem;
    max-width: 400px;
    width: 100%;
    text-align: center;
    box-shadow: 0 25px 50px rgba(0,0,0,.25);
}
.login-icon { margin-bottom: 1.5rem; }
.login-card h1 { font-size: 1.4rem; margin-bottom: .3rem; }
.login-card .sub { color: var(--text-muted); margin-bottom: 2rem; font-size: .9rem; }
.login-card input {
    width: 100%;
    padding: .75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
    margin-bottom: 1rem;
    text-align: center;
}
.login-card input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }

/* ===== Password Page (Public) ===== */
.password-page { display: flex; align-items: center; justify-content: center; padding: 2rem; }
.password-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 3rem 2.5rem;
    max-width: 420px;
    width: 100%;
    text-align: center;
    box-shadow: 0 25px 50px rgba(0,0,0,.25);
}
.password-card h1 { font-size: 1.3rem; margin-bottom: .5rem; }
.password-card .sub { color: var(--text-muted); margin-bottom: 2rem; font-size: .9rem; }
.password-card input {
    width: 100%;
    padding: .75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
    margin-bottom: 1rem;
    text-align: center;
    letter-spacing: 2px;
}
.password-card input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .6rem 1.2rem;
    border: none;
    border-radius: var(--radius);
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background .15s, transform .1s;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--surface-hover); color: var(--text); }
.btn-sm { padding: .4rem .8rem; font-size: .8rem; }
.btn-full { width: 100%; justify-content: center; padding: .8rem; }

/* ===== Layout ===== */
.admin-wrap { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }
.admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}
.admin-header h1 { font-size: 1.5rem; }
.admin-header-actions { display: flex; gap: .5rem; }

/* ===== Cards ===== */
.card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,.15);
}
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: .5rem;
}
.card-header h2 { font-size: 1.1rem; }

/* ===== Stat Boxes ===== */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.stat-box {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.2rem;
    text-align: center;
    border: 1px solid var(--border);
}
.stat-box .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
    margin-bottom: .3rem;
}
.stat-box .stat-label {
    font-size: .8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .5px;
}

/* ===== Table ===== */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .75rem 1rem; text-align: left; }
th {
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}
td { border-bottom: 1px solid rgba(51,65,85,.4); font-size: .9rem; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(59,130,246,.03); }

/* ===== Badges ===== */
.badge {
    display: inline-block;
    padding: .2rem .6rem;
    border-radius: 20px;
    font-size: .75rem;
    font-weight: 600;
}
.badge-active { background: rgba(34,197,94,.15); color: var(--success); }
.badge-inactive { background: rgba(239,68,68,.15); color: var(--danger); }

/* ===== Upload Form ===== */
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; color: #cbd5e1; margin-bottom: .4rem; }
.form-group input[type="text"],
.form-group input[type="password"] {
    width: 100%;
    padding: .7rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    font-size: .95rem;
}
.form-group input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }
.form-hint { font-size: .8rem; color: var(--text-muted); margin-top: .3rem; }

.file-drop {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color .2s, background .2s;
}
.file-drop:hover, .file-drop.drag-over {
    border-color: var(--primary);
    background: rgba(59,130,246,.05);
}
.file-drop input[type="file"] { display: none; }
.file-drop .file-label { color: var(--text-muted); font-size: .9rem; }
.file-drop .file-name { color: var(--primary); font-weight: 600; margin-top: .5rem; }

/* ===== Link Copy ===== */
.link-box {
    display: flex;
    gap: .5rem;
    align-items: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: .3rem .3rem .3rem .8rem;
}
.link-box input {
    flex: 1;
    background: none;
    border: none;
    color: var(--primary);
    font-size: .85rem;
    outline: none;
}
.link-box .btn { white-space: nowrap; }

/* ===== Alerts ===== */
.alert {
    padding: .75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: .9rem;
}
.alert-error { background: rgba(127,29,29,.4); color: #fca5a5; }
.alert-success { background: rgba(20,83,45,.4); color: #86efac; }

/* ===== Chart ===== */
.chart-bar-wrap { display: flex; align-items: flex-end; gap: 3px; height: 120px; padding-top: 1rem; }
.chart-bar {
    flex: 1;
    background: var(--primary);
    border-radius: 3px 3px 0 0;
    min-height: 2px;
    position: relative;
    transition: opacity .2s;
}
.chart-bar:hover { opacity: .8; }
.chart-bar .chart-tooltip {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface);
    border: 1px solid var(--border);
    padding: .3rem .6rem;
    border-radius: 6px;
    font-size: .75rem;
    white-space: nowrap;
    z-index: 10;
}
.chart-bar:hover .chart-tooltip { display: block; }
.chart-labels {
    display: flex;
    gap: 3px;
    margin-top: .3rem;
}
.chart-labels span {
    flex: 1;
    text-align: center;
    font-size: .65rem;
    color: var(--text-muted);
}

/* ===== Viewer ===== */
.viewer-wrap {
    position: fixed;
    inset: 0;
    background: #fff;
}
.viewer-wrap iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}
.empty-state svg { margin-bottom: 1rem; opacity: .4; }
.empty-state p { font-size: .95rem; }

/* ===== Responsive ===== */
@media (max-width: 640px) {
    .admin-wrap { padding: 1rem; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
    th, td { padding: .5rem .6rem; font-size: .8rem; }
    .admin-header { flex-direction: column; align-items: flex-start; }
}

/* ===== Confirm Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}
.modal {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 2rem;
    max-width: 400px;
    width: 100%;
    text-align: center;
}
.modal h3 { margin-bottom: .5rem; }
.modal p { color: var(--text-muted); margin-bottom: 1.5rem; font-size: .9rem; }
.modal-actions { display: flex; gap: .5rem; justify-content: center; }