:root {
    --bg-color: #f5f5f7;
    --text-color: #1d1d1f;
    --card-bg: rgba(255, 255, 255, 0.7);
    --border-color: rgba(0, 0, 0, 0.1);
    --accent: #0066cc;
    --danger: #ff3b30;
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.05);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #000000;
        --text-color: #f5f5f7;
        --card-bg: rgba(30, 30, 30, 0.6);
        --border-color: rgba(255, 255, 255, 0.1);
        --accent: #2997ff;
        --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
    }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* Glassmorphism */
.glass {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

/* Frontend Layout */
.container.layout-split {
    display: flex;
    min-height: 100vh;
    padding: 2rem;
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.profile-side {
    flex: 0 0 350px;
    padding: 2rem;
    position: sticky;
    top: 2rem;
    height: calc(100vh - 4rem);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.profile-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: #ccc; /* Placeholder */
    margin-bottom: 1.5rem;
}

.content-side { flex: 1; }

.timeline-item {
    padding-left: 20px;
    border-left: 2px solid var(--accent);
    margin-bottom: 2rem;
    position: relative;
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 5px;
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
}

/* Components */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 500;
    transition: 0.2s;
    cursor: pointer;
    border: none;
}
.btn-primary { background: var(--accent); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn:hover { opacity: 0.8; }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-size: 0.9rem; }
.form-control {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-color);
}

.table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
.table th, .table td { padding: 10px; text-align: left; border-bottom: 1px solid var(--border-color); }

/* Admin Layout */
.admin-body { padding: 2rem; }
.admin-nav {
    padding: 1rem 2rem;
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
}
.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    margin-right: 1rem;
    font-weight: 500;
}
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}
.stat-card { padding: 2rem; text-align: center; }
.stat-number { font-size: 2.5rem; font-weight: bold; color: var(--accent); }
.p-2 { padding: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mt-2 { margin-top: 2rem; }

/* Loader */
.loader {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: var(--bg-color);
    z-index: 9999;
    transition: opacity 0.5s;
    pointer-events: none;
}

@media (max-width: 768px) {
    .container.layout-split { flex-direction: column; }
    .profile-side { position: relative; height: auto; top: 0; }
}