/* --- VARIABLES CSS (Tema Material Design 3) --- */
:root {
    --md-sys-color-primary: #6750a4;
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-primary-container: #eaddff;
    --md-sys-color-on-primary-container: #21005d;
    --md-sys-color-secondary: #625b71;
    --md-sys-color-surface: #fef7ff;
    --md-sys-color-surface-container: #f3edf7;
    --md-sys-color-on-surface: #1d1b20;
    --md-sys-color-outline: #79747e;
    --md-sys-color-error: #b3261e;
    --md-sys-color-error-container: #f9dedc;
    
    --border-radius-l: 24px;
    --border-radius-m: 16px;
    --border-radius-s: 8px;
    
    --shadow-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.3);
    --shadow-2: 0px 4px 8px 3px rgba(0, 0, 0, 0.15), 0px 1px 3px 0px rgba(0, 0, 0, 0.3);
}

/* --- RESET & BASICS --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    line-height: 1.6;
    display: flex;
    min-height: 100vh;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* --- LAYOUT --- */
.app-container {
    display: flex;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}

/* --- SIDEBAR NAVIGATION --- */
.sidebar {
    width: 280px;
    background-color: var(--md-sys-color-surface-container);
    padding: 24px;
    height: 100vh;
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    border-right: 1px solid rgba(0,0,0,0.05);
    overflow-y: auto;
}

.brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--md-sys-color-primary);
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-link {
    display: block;
    padding: 12px 16px;
    margin-bottom: 8px;
    border-radius: var(--border-radius-m);
    color: var(--md-sys-color-on-surface);
    transition: background 0.2s, color 0.2s;
    font-weight: 500;
}

.nav-link:hover {
    background-color: rgba(103, 80, 164, 0.08);
}

.nav-link.active {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
}

/* --- MAIN CONTENT --- */
.main-content {
    flex: 1;
    padding: 40px;
    max-width: 1000px;
}

/* --- TYPOGRAPHY & ELEMENTS --- */
h1 {
    font-size: 3rem;
    color: var(--md-sys-color-primary);
    margin-bottom: 16px;
    line-height: 1.2;
}

h2 {
    font-size: 2rem;
    margin-top: 48px;
    margin-bottom: 24px;
    color: var(--md-sys-color-on-surface);
    border-bottom: 2px solid var(--md-sys-color-primary-container);
    padding-bottom: 8px;
}

h3 {
    font-size: 1.5rem;
    margin-top: 32px;
    margin-bottom: 16px;
    color: var(--md-sys-color-secondary);
}

p { margin-bottom: 16px; font-size: 1.1rem; }

/* --- CARDS --- */
.card {
    background-color: white;
    border-radius: var(--border-radius-l);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-1);
    transition: box-shadow 0.3s ease;
    border: 1px solid rgba(0,0,0,0.02);
}

.card:hover {
    box-shadow: var(--shadow-2);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--md-sys-color-primary);
}

/* --- ALERTS & INFO --- */
.alert {
    padding: 16px;
    border-radius: var(--border-radius-m);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-error {
    background-color: var(--md-sys-color-error-container);
    color: var(--md-sys-color-error);
    font-weight: bold;
}

.alert-info {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
}

/* --- BUTTONS --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: 100px;
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    font-weight: 500;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    margin-top: 8px;
}

.btn:hover {
    background-color: #55408a; /* Darker shade of primary */
    box-shadow: var(--shadow-1);
}

.btn-small {
    padding: 6px 16px;
    font-size: 0.9rem;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--md-sys-color-outline);
    color: var(--md-sys-color-on-surface);
}

.btn-outline:hover {
    background-color: rgba(0,0,0,0.05);
}

/* --- CODE BLOCKS --- */
.code-container {
    position: relative;
    background-color: #1e1e1e;
    border-radius: var(--border-radius-m);
    overflow: hidden;
    margin: 16px 0;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background-color: #2d2d2d;
    color: #ccc;
    font-size: 0.85rem;
    font-family: monospace;
}

pre {
    padding: 16px;
    overflow-x: auto;
    color: #d4d4d4;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.95rem;
}

.copy-btn {
    background: transparent;
    border: 1px solid #555;
    color: #fff;
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
}

.copy-btn:hover { background: #444; }

/* --- TABLE --- */
.download-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}

.download-table th, .download-table td {
    text-align: left;
    padding: 12px;
    border-bottom: 1px solid #eee;
}

.download-table th {
    color: var(--md-sys-color-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .app-container { flex-direction: column; }
    .sidebar { width: 100%; height: auto; position: relative; padding: 16px; }
    .main-content { padding: 20px; }
    h1 { font-size: 2rem; }
}