/* ── Variables ─────────────────────────────────────────────────────────────── */
:root {
    --bg:           #0f1117;
    --bg-card:      #1a1d27;
    --bg-elevated:  #21253a;
    --accent:       #6c63ff;
    --accent-hover: #5a52e0;
    --accent-glow:  rgba(108, 99, 255, 0.25);
    --text:         #e8e9f0;
    --text-muted:   #9ca3b0;
    --border:       #2e3147;
    --success:      #22c55e;
    --warning:      #f59e0b;
    --danger:       #ef4444;
    --radius:       14px;
    --radius-sm:    8px;
    --shadow:       0 4px 24px rgba(0,0,0,0.4);
    --shadow-hover: 0 8px 40px rgba(108, 99, 255, 0.2);
    --transition:   0.2s ease;
}

/* ── Reset / Base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

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

main.container { flex: 1; }

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

.accent-text { color: var(--accent); }

/* ── Navbar ────────────────────────────────────────────────────────────────── */
.navbar {
    background: rgba(15, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 0;
}

.navbar-brand {
    color: var(--text) !important;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.navbar-brand i { color: var(--accent); }

.nav-link {
    color: var(--text-muted) !important;
    font-size: 0.875rem;
    transition: color var(--transition);
    padding: 0.5rem 0.75rem !important;
}

.nav-link:hover { color: var(--text) !important; }

/* ── Hero Text ─────────────────────────────────────────────────────────────── */
.hero-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text);
    line-height: 1.2;
}

.hero-title .accent { color: var(--accent); }

.hero-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    margin-top: 0.75rem;
}

/* ── Cards ─────────────────────────────────────────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.main-card {
    transition: box-shadow var(--transition);
}

.main-card:hover {
    box-shadow: var(--shadow-hover);
}

/* ── Drop Zone ─────────────────────────────────────────────────────────────── */
.drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition),
                box-shadow var(--transition);
    position: relative;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-glow);
    box-shadow: 0 0 0 4px rgba(108, 99, 255, 0.1);
}

.drop-zone.drag-over { border-style: solid; }

.drop-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 0.75rem;
    transition: transform var(--transition);
}

.drop-zone:hover .drop-icon,
.drop-zone.drag-over .drop-icon { transform: translateY(-4px) scale(1.1); }

.drop-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.drop-sub { color: var(--text-muted); font-size: 0.875rem; margin-bottom: 0.75rem; }

.drop-limit { color: var(--text-muted); font-size: 0.8rem; margin: 0; }

/* Selected file state */
.selected-file {
    display: flex !important;
    align-items: center;
    gap: 1rem;
    text-align: left;
}

.file-check-icon {
    font-size: 2rem;
    color: var(--success);
    flex-shrink: 0;
}

.selected-name {
    font-weight: 600;
    color: var(--text);
    margin: 0;
    word-break: break-all;
    font-size: 0.95rem;
}

.selected-size {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin: 0;
}

.btn-clear {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
    flex-shrink: 0;
}

.btn-clear:hover { color: var(--danger); background: rgba(239,68,68,0.1); }

/* ── Form Controls ─────────────────────────────────────────────────────────── */
.field-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.form-control, .input-group-text {
    background: var(--bg-elevated);
    border-color: var(--border);
    color: var(--text);
    border-radius: var(--radius-sm) !important;
}

.form-control:focus {
    background: var(--bg-elevated);
    border-color: var(--accent);
    color: var(--text);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-control::placeholder { color: var(--text-muted); }

.input-group-text {
    color: var(--text-muted);
    border-right: none;
}

.password-group .form-control {
    border-left: none;
    border-right: none;
    border-radius: 0 !important;
}

.password-group .input-group-text {
    border-radius: var(--radius-sm) 0 0 var(--radius-sm) !important;
}

.toggle-pw, .toggle-pw-dl {
    background: var(--bg-elevated);
    border-color: var(--border);
    border-left: none;
    color: var(--text-muted);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0 !important;
    transition: color var(--transition);
}

.toggle-pw:hover, .toggle-pw-dl:hover { color: var(--text); }

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn-accent {
    background: var(--accent);
    border: none;
    color: #fff;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    transition: background var(--transition), transform var(--transition),
                box-shadow var(--transition);
    letter-spacing: 0.01em;
}

.btn-accent:hover:not(:disabled) {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-accent:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-outline-accent {
    background: transparent;
    border: 1.5px solid var(--accent);
    color: var(--accent);
    font-weight: 600;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-sm);
    transition: background var(--transition), color var(--transition);
}

.btn-outline-accent:hover {
    background: var(--accent);
    color: #fff;
}

.upload-btn {
    font-size: 1rem;
    letter-spacing: 0.02em;
}

/* ── Expiry Picker ─────────────────────────────────────────────────────────── */
.expiry-picker {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.expiry-option {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.45rem 1rem;
    border-radius: var(--radius-sm);
    border: 1.5px solid rgba(255,255,255,0.25);
    background: rgba(255,255,255,0.07);
    color: #ffffff;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition),
                color var(--transition), box-shadow var(--transition);
    user-select: none;
}

.expiry-option input { display: none; }

.expiry-option:hover {
    border-color: rgba(255,255,255,0.6);
    background: rgba(255,255,255,0.12);
    color: #ffffff;
}

.expiry-option.active {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
    font-weight: 700;
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.25);
}

/* ── Progress Bar ──────────────────────────────────────────────────────────── */
.progress-label { font-size: 0.8rem; color: var(--text-muted); }

.upload-progress {
    height: 6px;
    background: var(--bg-elevated);
    border-radius: 99px;
    overflow: hidden;
}

.upload-progress .progress-bar {
    background: linear-gradient(90deg, var(--accent), #a78bfa);
    border-radius: 99px;
}

/* ── Success Card ──────────────────────────────────────────────────────────── */
.success-card { border-color: rgba(108, 99, 255, 0.4); }

.success-icon-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: rgba(34, 197, 94, 0.12);
    animation: pop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes pop {
    from { transform: scale(0); opacity: 0; }
    to   { transform: scale(1); opacity: 1; }
}

.success-icon { font-size: 2rem; color: var(--success); }

/* Result blocks */
.result-block { text-align: left; }

.result-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.4rem;
}

.result-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.result-input {
    flex: 1;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    cursor: text;
    min-width: 0;
}

.result-input:focus { outline: none; border-color: var(--accent); }

.result-password {
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    letter-spacing: 0.1em;
    font-weight: 700;
    color: var(--accent);
}

.copy-btn {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition), border-color var(--transition),
                background var(--transition);
}

.copy-btn:hover { color: var(--accent); border-color: var(--accent); }

.copy-btn.copied {
    color: var(--success);
    border-color: var(--success);
    background: rgba(34,197,94,0.1);
}

.expiry-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
}

/* ── Download Page ─────────────────────────────────────────────────────────── */
.file-info-header {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-icon-wrap {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--accent);
    flex-shrink: 0;
}

.file-name {
    color: var(--text);
    font-weight: 600;
    word-break: break-all;
    font-size: 1rem;
}

.file-meta {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.expiry-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--warning);
    border-radius: var(--radius-sm);
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Expired state */
.expired-icon-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.1);
    margin: 0 auto;
}

.expired-icon { font-size: 2.2rem; color: var(--danger); }

/* ── Admin Dashboard ───────────────────────────────────────────────────────── */
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    transition: box-shadow var(--transition);
}

.stat-card:hover { box-shadow: var(--shadow-hover); }

.stat-card-warn { border-color: rgba(245,158,11,0.3); }

.stat-icon { font-size: 1.25rem; color: var(--accent); margin-bottom: 0.5rem; }
.stat-card-warn .stat-icon { color: var(--warning); }

.stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Admin table */
.admin-table {
    color: var(--text);
    margin: 0;
    font-size: 0.875rem;
}

.admin-table thead th {
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    color: #cbd5e1;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.75rem 1rem;
    white-space: nowrap;
}

.admin-table tbody td {
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1rem;
    vertical-align: middle;
    color: var(--text);
}

.admin-table tbody tr:last-child td { border-bottom: none; }

.admin-table .empty-row td { border-bottom: 1px solid var(--border); height: 44px; }

.admin-table tbody tr:hover td { background: rgba(255,255,255,0.02); }

.expired-row td { opacity: 0.75; }

.file-table-name {
    display: inline-block;
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: middle;
}

.badge-expired {
    display: inline-block;
    background: rgba(239,68,68,0.15);
    color: var(--danger);
    border: 1px solid rgba(239,68,68,0.3);
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 1px 6px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    vertical-align: middle;
}

.token-link { color: var(--accent); font-size: 0.85rem; }
.token-link:hover { color: var(--accent-hover); }

.btn-expiry-edit {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 0.15rem 0.3rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
    line-height: 1;
    transition: color var(--transition), background var(--transition);
    flex-shrink: 0;
}

.btn-expiry-edit:hover { color: var(--accent); background: var(--accent-glow); }

.dropdown-menu.expiry-dropdown {
    background: var(--bg-card) !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-sm) !important;
    box-shadow: var(--shadow) !important;
    min-width: 220px;
    color: var(--text);
}

.expiry-dropdown-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
}

.btn-delete {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: color var(--transition), border-color var(--transition),
                background var(--transition);
}

.btn-delete:hover {
    color: var(--danger);
    border-color: rgba(239,68,68,0.4);
    background: rgba(239,68,68,0.08);
}

/* Admin login icon */
.admin-login-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--accent-glow);
    font-size: 1.75rem;
    color: var(--accent);
}

/* ── Alerts ────────────────────────────────────────────────────────────────── */
.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.3);
    color: #86efac;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.alert-dismissible .btn-close { filter: invert(1) brightness(0.6); }

/* ── Footer ────────────────────────────────────────────────────────────────── */
footer {
    border-top: 1px solid var(--border);
    margin-top: 3rem;
}

/* ── Utilities ─────────────────────────────────────────────────────────────── */
.text-muted { color: var(--text-muted) !important; }

code {
    background: var(--bg-elevated);
    color: var(--accent);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 0.8rem;
}

/* Bootstrap table override */
.table { --bs-table-bg: transparent; --bs-table-hover-bg: transparent; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Admin light theme ─────────────────────────────────────────────────────── */
.admin-theme {
    --bg:          #f1f5f9;
    --bg-card:     #ffffff;
    --bg-elevated: #f8fafc;
    --text:        #0f172a;
    --text-muted:  #475569;
    --border:      #cbd5e1;
    --shadow:      0 2px 12px rgba(0,0,0,0.08);
    --shadow-hover:0 6px 24px rgba(108,99,255,0.15);
    background-color: var(--bg);
    color: var(--text);
}

.admin-theme .navbar {
    background: #ffffff;
    border-bottom-color: var(--border);
}

.admin-theme .navbar-brand { color: var(--text) !important; }
.admin-theme .nav-link     { color: var(--text-muted) !important; }
.admin-theme .nav-link:hover { color: var(--text) !important; }

.admin-theme .card {
    background: var(--bg-card);
    border-color: var(--border);
}

.admin-theme .stat-card { background: var(--bg-card); border-color: var(--border); }
.admin-theme .stat-value { color: var(--text); }
.admin-theme .stat-label { color: var(--text-muted); }
.admin-theme .stat-icon  { color: var(--accent); }

.admin-theme .admin-table thead th {
    background: var(--bg-elevated);
    color: #334155;
    border-bottom-color: var(--border);
}

.admin-theme .admin-table tbody td {
    color: var(--text);
    border-bottom-color: var(--border);
}

.admin-theme .admin-table tbody tr:hover td { background: #f1f5f9; }

.admin-theme .expired-row td { opacity: 0.55; }

.admin-theme .badge-expired {
    background: rgba(239,68,68,0.1);
    color: #dc2626;
    border-color: rgba(239,68,255,0.2);
}

.admin-theme code {
    background: #e2e8f0;
    color: #4f46e5;
}

.admin-theme .token-link { color: #4f46e5; }

.admin-theme .btn-delete { color: var(--text-muted); }
.admin-theme .btn-delete:hover {
    color: #dc2626;
    border-color: rgba(220,38,38,0.4);
    background: rgba(220,38,38,0.06);
}

.admin-theme .btn-expiry-edit { color: var(--text-muted); }
.admin-theme .btn-expiry-edit:hover { color: var(--accent); background: rgba(108,99,255,0.08); }

.admin-theme .dropdown-menu.expiry-dropdown {
    background: #ffffff !important;
    border-color: var(--border) !important;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1) !important;
}

.admin-theme .expiry-dropdown-label { color: var(--text-muted); }

.admin-theme .form-control,
.admin-theme .input-group-text {
    background: var(--bg-elevated);
    border-color: var(--border);
    color: var(--text);
}

.admin-theme .form-control:focus {
    background: #fff;
    border-color: var(--accent);
    color: var(--text);
}

.admin-theme .form-control::placeholder { color: #94a3b8; }

.admin-theme .toggle-pw,
.admin-theme .toggle-pw-dl {
    background: var(--bg-elevated);
    border-color: var(--border);
    color: var(--text-muted);
}

.admin-theme .field-label { color: var(--text-muted); }

.admin-theme .admin-login-icon {
    background: rgba(108,99,255,0.1);
}

.admin-theme footer { border-top-color: var(--border); }
.admin-theme footer .text-muted { color: var(--text-muted) !important; }

.admin-theme .alert-success {
    background: #dcfce7;
    border-color: #86efac;
    color: #166534;
}

.admin-theme .alert-danger {
    background: #fee2e2;
    border-color: #fca5a5;
    color: #991b1b;
}

.admin-theme .alert-dismissible .btn-close { filter: none; }

.admin-theme ::-webkit-scrollbar-track { background: var(--bg); }
.admin-theme ::-webkit-scrollbar-thumb { background: var(--border); }

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 576px) {
    .hero-title { font-size: 1.8rem; }
    .drop-zone { padding: 1.75rem 1rem; }
    .file-table-name { max-width: 100px; }
}