* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg: #0f0f1a;
    --card-bg: #1a1a2e;
    --card-border: #2a2a4a;
    --accent: #6c5ce7;
    --accent-hover: #7c6cf7;
    --text: #e0e0e0;
    --text-muted: #888;
    --success: #00e676;
    --danger: #ff5252;
    --warning: #ffc107;
}

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

.page { display: none; }
.page.active { display: block; }

/* Login */
.login-card {
    max-width: 380px;
    margin: 15vh auto;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 40px 32px;
    text-align: center;
}

.login-card h1 {
    font-size: 28px;
    background: linear-gradient(135deg, #a29bfe, #00cec9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 4px;
}

.login-card h2 {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 30px;
    font-weight: 400;
}

.form-group {
    text-align: left;
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.form-group input, .form-row input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    color: var(--text);
    font-size: 15px;
    outline: none;
    transition: border-color 0.3s;
}

.form-group input:focus, .form-row input:focus {
    border-color: var(--accent);
}

.btn-primary {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 10px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
    margin-top: 8px;
}

.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { transform: scale(0.98); }

.error-msg {
    color: var(--danger);
    font-size: 13px;
    margin-top: 12px;
    min-height: 20px;
}

/* Topbar */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar h2 {
    font-size: 18px;
    background: linear-gradient(135deg, #a29bfe, #00cec9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.btn-logout {
    background: rgba(255,82,82,0.15);
    color: var(--danger);
    border: 1px solid rgba(255,82,82,0.3);
    border-radius: 8px;
    padding: 8px 16px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-logout:hover { background: rgba(255,82,82,0.25); }

/* Dashboard */
.dashboard {
    max-width: 800px;
    margin: 24px auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-bottom: 40px;
}

/* Stats */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-num {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
}

.card h3 {
    padding: 16px 20px;
    font-size: 15px;
    border-bottom: 1px solid var(--card-border);
    font-weight: 600;
}

.card-body { padding: 20px; }

.form-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.form-row .btn-primary {
    width: auto;
    white-space: nowrap;
    margin-top: 0;
    flex-shrink: 0;
}

.info-row {
    display: flex;
    justify-content: space-between;
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-muted);
}

.info-row strong { color: var(--text); }

.hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 10px;
    padding: 8px 12px;
    background: rgba(255,193,7,0.08);
    border-radius: 6px;
    border-left: 3px solid var(--warning);
}

/* Status message */
.status-msg {
    text-align: center;
    font-size: 14px;
    padding: 10px;
    border-radius: 8px;
    min-height: 20px;
    transition: opacity 0.3s;
}

.status-msg.success {
    background: rgba(0,230,118,0.1);
    color: var(--success);
    border: 1px solid rgba(0,230,118,0.2);
}

.status-msg.error {
    background: rgba(255,82,82,0.1);
    color: var(--danger);
    border: 1px solid rgba(255,82,82,0.2);
}

@media (max-width: 600px) {
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .form-row { flex-direction: column; }
    .form-row .btn-primary { width: 100%; }
    .dashboard { padding: 0 12px; }
}