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

:root {
    --bg: #020617;
    --bg-alt: #0b1220;
    --bg-soft: #020617;
    --accent: #38bdf8;
    --accent-soft: rgba(56,189,248,0.1);
    --accent-strong: #0ea5e9;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --border: #1e293b;
    --danger: #f97373;
    --success: #22c55e;
}

.theme-light {
    --bg: #f9fafb;
    --bg-alt: #ffffff;
    --bg-soft: #f3f4f6;
    --accent: #0ea5e9;
    --accent-soft: rgba(14,165,233,0.1);
    --accent-strong: #0284c7;
    --text: #020617;
    --muted: #6b7280;
    --border: #e5e7eb;
    --danger: #ef4444;
    --success: #16a34a;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
    background: radial-gradient(circle at top left, #0f172a, #020617);
    color: var(--text);
    min-height: 100vh;
}

/* App shell */

.app-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 230px;
    background: linear-gradient(180deg, #020617, #020617 40%, #020617);
    border-right: 1px solid var(--border);
    padding: 18px 14px;
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.sidebar-logo {
    font-weight: 800;
    font-size: 22px;
    margin-bottom: 20px;
    color: var(--accent);
}
.sidebar-logo span {
    color: var(--text);
    font-size: 16px;
    margin-left: 2px;
}

.sidebar-nav a {
    display: block;
    padding: 8px 10px;
    border-radius: 999px;
    color: var(--muted);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 4px;
    transition: background .15s ease, color .15s ease, transform .1s ease;
}
.sidebar-nav a:hover {
    background: var(--accent-soft);
    color: var(--accent-strong);
    transform: translateX(2px);
}

.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
    background: rgba(2,6,23,0.85);
    position: sticky;
    top: 0;
    z-index: 10;
}

.icon-btn {
    border: none;
    background: transparent;
    font-size: 20px;
    color: var(--text);
    cursor: pointer;
    display: none;
}

.topbar-title {
    font-weight: 600;
    font-size: 16px;
}

.topbar-user {
    font-size: 13px;
    color: var(--muted);
}

.content {
    padding: 16px;
}

.footer {
    padding: 10px 16px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--muted);
    margin-top: auto;
}

/* Cards */

.card {
    background: radial-gradient(circle at top left, rgba(56,189,248,0.08), var(--bg-alt));
    border-radius: 18px;
    border: 1px solid var(--border);
    padding: 16px 14px;
    margin-bottom: 14px;
    box-shadow: 0 18px 40px rgba(15,23,42,0.65);
    animation: cardIn .25s ease-out;
}

@keyframes cardIn {
    from {opacity: 0; transform: translateY(6px);}
    to {opacity: 1; transform: translateY(0);}
}

.card h1,
.card h2,
.card h3 {
    margin-bottom: 8px;
}

.subtitle {
    font-size: 13px;
    color: var(--muted);
}

/* Buttons & inputs */

.btn,
button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 7px 14px;
    border-radius: 999px;
    border: none;
    background: linear-gradient(90deg, var(--accent), var(--accent-strong));
    color: #0b1120;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: transform .08s ease, box-shadow .08s ease, opacity .15s ease;
    box-shadow: 0 8px 20px rgba(56,189,248,0.35);
}
.btn:hover,
button:hover {
    transform: translateY(-1px);
    box-shadow: 0 15px 30px rgba(56,189,248,0.4);
}
.btn-secondary {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--border);
    box-shadow: none;
}
.btn-secondary:hover {
    background: var(--accent-soft);
    box-shadow: none;
}

.input-group {
    margin-bottom: 12px;
}
label {
    display: block;
    font-size: 13px;
    margin-bottom: 4px;
}
input[type="text"],
input[type="tel"],
input[type="password"],
input[type="file"],
select {
    width: 100%;
    padding: 8px 10px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--bg-soft);
    color: var(--text);
    font-size: 13px;
}
input[type="file"] {
    padding: 6px 10px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    background: var(--accent-soft);
    color: var(--accent-strong);
}

/* Layout grid */

.grid {
    display: grid;
    gap: 10px;
}
.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.stat-card {
    padding: 12px;
    border-radius: 14px;
    background: var(--bg-soft);
    border: 1px solid var(--border);
}
.stat-title {
    font-size: 13px;
    color: var(--muted);
}
.stat-value {
    font-size: 22px;
    font-weight: 700;
    margin-top: 4px;
}

/* Folders */

.folder-grid {
    display: grid;
    gap: 10px;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}
.folder-card {
    padding: 12px;
    border-radius: 16px;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.folder-name {
    font-weight: 600;
    margin-bottom: 4px;
}
.folder-meta {
    font-size: 12px;
    color: var(--muted);
}

/* File table */

.file-list {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}
.file-list th,
.file-list td {
    border-bottom: 1px solid var(--border);
    padding: 6px 4px;
}
.file-list th {
    text-align: left;
    color: var(--muted);
    font-weight: 500;
}

/* Auth container */

.auth-container {
    max-width: 400px;
    margin: 40px auto;
}

/* Notices */

.notice {
    font-size: 13px;
    color: var(--muted);
}

/* Search bar */

.search-bar {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    align-items: center;
}

/* Responsive */

@media (max-width: 900px) {
    .sidebar {
        position: fixed;
        left: -250px;
        top: 0;
        bottom: 0;
        z-index: 20;
        transition: left .2s ease;
    }
    .sidebar.open {
        left: 0;
    }
    .icon-btn {
        display: inline-flex;
    }
    .content {
        padding: 12px;
    }
}

/* Toast */

.toast {
    position: fixed;
    bottom: 14px;
    right: 14px;
    background: var(--bg-alt);
    border-radius: 999px;
    padding: 8px 14px;
    border: 1px solid var(--border);
    font-size: 12px;
    color: var(--muted);
    box-shadow: 0 10px 30px rgba(15,23,42,0.7);
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity .15s ease, transform .15s ease;
}
.toast.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}