@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Fraunces:opsz,wght@9..144,700&display=swap');

:root {
    /* Color Palette */
    --primary-color: #4f46e5; /* Indigo 600 */
    --primary-hover-color: #4338ca; /* Indigo 700 */
    --primary-inverse-color: #ffffff;
    
    --accent-color: #f59e0b; /* Amber 500 */
    
    /* Backgrounds */
    --body-bg-color: #f8fafc; /* Slate 50 */
    --surface-color: #ffffff;
    --surface-hover: #f1f5f9; /* Slate 100 */
    
    /* Text */
    --text-main: #1e293b; /* Slate 800 */
    --text-secondary: #475569; /* Slate 600 */
    --text-muted: #94a3b8; /* Slate 400 */
    
    /* Borders & Shadows */
    --border-color: #e2e8f0; /* Slate 200 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Semantic Colors */
    --success-color: #10b981;
    --success-bg: #d1fae5;
    --danger-color: #ef4444;
    --danger-bg: #fee2e2;
    --warning-color: #f59e0b;
    --warning-bg: #fef3c7;
    --info-color: #3b82f6;
    --info-bg: #dbeafe;
    
    /* Layout */
    --border-radius-sm: 6px;
    --border-radius-md: 10px;
    --border-radius-lg: 16px;
}

/* ==========================================================================
   Global Reset & Base
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-main);
    background-color: var(--body-bg-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.2;
}

h1 { font-size: 2.5rem; font-family: 'Fraunces', serif; }
h2 { font-size: 2rem; font-family: 'Fraunces', serif; }
h3 { font-size: 1.5rem; }

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-hover-color);
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.main-content {
    padding: 2rem 0;
}

/* ==========================================================================
   Components: Cards
   ========================================================================== */
.fcb-card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    transition: box-shadow 0.3s ease;
}

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

.fcb-card-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.fcb-card-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
}

/* ==========================================================================
   Components: Buttons
   ========================================================================== */
.fcb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.fcb-btn-primary {
    background-color: var(--primary-color);
    color: var(--primary-inverse-color);
    box-shadow: 0 2px 4px rgba(79, 70, 229, 0.2);
}

.fcb-btn-primary:hover {
    background-color: var(--primary-hover-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(79, 70, 229, 0.3);
}

.fcb-btn-primary:active {
    transform: translateY(0);
}

.fcb-btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.fcb-btn-secondary:hover {
    background-color: var(--surface-hover);
}

.fcb-btn-danger {
    background-color: var(--danger-color);
    color: #fff;
}

.fcb-btn-danger:hover {
    background-color: #dc2626;
}

.fcb-btn-block {
    width: 100%;
}

.fcb-btn:disabled,
.fcb-btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ==========================================================================
   Components: Forms
   ========================================================================== */
.fcb-form-group {
    margin-bottom: 1.5rem;
}

.fcb-form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.fcb-form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--surface-color);
    color: var(--text-main);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.fcb-form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

/* ==========================================================================
   Components: Alerts & Badges
   ========================================================================== */
.fcb-alert {
    padding: 1rem;
    border-radius: var(--border-radius-md);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.fcb-alert-info { background-color: var(--info-bg); color: var(--info-color); border: 1px solid #bfdbfe; }
.fcb-alert-success { background-color: var(--success-bg); color: var(--success-color); border: 1px solid #a7f3d0; }
.fcb-alert-warning { background-color: var(--warning-bg); color: var(--warning-color); border: 1px solid #fde68a; }
.fcb-alert-danger { background-color: var(--danger-bg); color: var(--danger-color); border: 1px solid #fecaca; }

.fcb-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.fcb-badge-primary { background-color: var(--info-bg); color: var(--info-color); }
.fcb-badge-success { background-color: var(--success-bg); color: #065f46; }

/* ==========================================================================
   Grid & Utilities
   ========================================================================== */
.fcb-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .fcb-grid-2 { grid-template-columns: 1fr; }
}

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ==========================================================================
   Global Layout (Header, Main, Footer)
   ========================================================================== */
#container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

#header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

#header_content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

#siteName {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    font-family: 'Fraunces', serif;
}

.brand-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.nav-wrapper {
    display: flex;
    align-items: center;
}

#navigation {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

#navigation a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
}

#navigation a:hover {
    color: var(--primary-color);
}

.nav-auth-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.login-link {
    background-color: var(--primary-color);
    color: white !important;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600 !important;
}

.login-link:hover {
    background-color: var(--primary-hover-color);
}

.register-link {
    font-weight: 600 !important;
}

.nav-toggle {
    display: none;
}

#mobile_menu {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-main);
}

@media (max-width: 768px) {
    #mobile_menu { display: block; }
    .header-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--surface-color);
        border-bottom: 1px solid var(--border-color);
        padding: 1rem;
    }
    .nav-toggle:checked ~ .header-links {
        display: block;
    }
    #navigation {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}

#body {
    flex: 1;
}

#body-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

#footer {
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    margin-top: auto;
}

#footer p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.footer-nav a {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0 0.5rem;
}

.footer-nav a:hover {
    color: var(--primary-color);
}