:root {
    --primary: #000000;
    --secondary: #666666;
    --accent: #000000;
    --bg: #FFFFFF;
    --bg-subtle: #F8F9FA;
    --border: #E0E0E0;
    --text: #1A1A1A;
    --text-muted: #6B6B6B;
    --success: #000000;
    --danger: #000000;
    --warning: #000000;
}

/* ===== BASE ===== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--primary);
}

/* ===== NAVBAR ===== */
.navbar {
    background: var(--bg) !important;
    border-bottom: 1px solid var(--border);
    box-shadow: none !important;
}

.navbar-brand {
    color: var(--primary) !important;
    font-weight: 700;
    font-size: 1.25rem;
}

.navbar-light .navbar-nav .nav-link {
    color: var(--text) !important;
    font-weight: 500;
    transition: color 0.2s;
}

.navbar-light .navbar-nav .nav-link:hover {
    color: var(--primary) !important;
}

/* ===== BUTTONS ===== */
.btn {
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover {
    background: var(--secondary);
    border-color: var(--secondary);
}

.btn-success {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--bg);
}

.btn-danger {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--bg);
}

.btn-warning {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--bg);
}

.btn-secondary {
    background: var(--bg-subtle);
    border-color: var(--border);
    color: var(--text);
}

.btn-outline-primary {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
}

.btn-outline-primary:hover {
    background: var(--primary);
    color: var(--bg);
}

.btn-outline-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: transparent;
    border-color: var(--border);
    color: var(--text-muted);
}

.btn-outline-secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
}

.btn-outline-secondary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-outline-warning {
    background: transparent;
    border: 1px solid #f0ad4e;
    color: #856404;
}

.btn-outline-warning:hover {
    background: #f0ad4e;
    color: white;
}

/* ===== CARDS ===== */
.card {
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: none;
    transition: border-color 0.2s;
}

.card:hover {
    border-color: var(--secondary);
}

/* ===== FORMS ===== */
.form-control, .form-select {
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color 0.2s;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

/* ===== HERO SECTION ===== */
.hero-section {
    background: var(--bg-subtle);
    padding: 5rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

/* ===== SECTIONS ===== */
.section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

/* ===== FEATURE CARDS ===== */
.feature-card {
    text-align: center;
    padding: 2.5rem 2rem;
    height: 100%;
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: border-color 0.2s;
}

.feature-card:hover {
    border-color: var(--primary);
}

/* ===== STATS ===== */
.stat-card {
    text-align: center;
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 8px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    display: block;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== PAGE CONTAINER ===== */
.page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

/* ===== MAIN CONTENT ===== */
main {
    flex: 1;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-subtle);
    border-top: 1px solid var(--border);
    padding: 2.5rem 0 1.5rem;
    margin-top: auto;
}

.footer-brand {
    font-weight: 700;
    color: var(--primary);
}

.footer h6 {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

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

.footer-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 1.5rem 0 1rem;
}

/* ===== UTILITIES ===== */
.text-muted { color: var(--text-muted) !important; }
.bg-subtle { background: var(--bg-subtle); }

/* ===== FORM PAGE ===== */
.form-page {
    max-width: 500px;
    margin: 3rem auto;
    padding: 0 1.5rem;
}

.form-page h2 {
    margin-bottom: 2rem;
    text-align: center;
}

.form-page .form-group {
    margin-bottom: 1.5rem;
}

.form-page .btn {
    width: 100%;
    margin-top: 0.5rem;
}

.form-page .btn:not(:last-child) {
    margin-bottom: 0.5rem;
}

/* Form group spacing */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text);
}

.form-group .form-control,
.form-group .form-select {
    width: 100%;
}

/* Form validation */
.text-danger {
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
}

/* ===== ALERTS ===== */
.alert {
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    border: 1px solid transparent;
    font-size: 0.9375rem;
}

.alert-danger {
    background-color: #FEE;
    border-color: #FCC;
    color: #C00;
}

.alert-danger strong {
    font-weight: 600;
}

.alert-success {
    background-color: #EFE;
    border-color: #CFC;
    color: #060;
}

.alert-warning {
    background-color: #FFC;
    border-color: #FEC;
    color: #840;
}

.alert-info {
    background-color: #EEF;
    border-color: #CCF;
    color: #006;
}

/* Multiple buttons in forms */
.form-page .btn + .btn {
    margin-left: 0;
}

/* Button group in forms */
.btn-group-form {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.btn-group-form .btn {
    flex: 1;
}

/* ===== BOOTSTRAP ICONS ===== */
.bi {
    color: var(--text);
}

.display-4 {
    font-size: 2.5rem;
}

.btn-primary .bi,
.btn-success .bi,
.btn-danger .bi,
.btn-warning .bi {
    color: var(--bg) !important;
}

.btn-outline-primary .bi {
    color: var(--primary);
}

.btn-outline-primary:hover .bi {
    color: var(--bg);
}

.btn-secondary .bi {
    color: var(--text);
}

/* ===== BADGES ===== */
.badge.bg-success {
    background-color: var(--primary) !important;
    color: var(--bg) !important;
}

.badge.bg-danger {
    background-color: var(--primary) !important;
    color: var(--bg) !important;
}

.badge.bg-warning {
    background-color: var(--primary) !important;
    color: var(--bg) !important;
}

.badge.bg-secondary {
    background-color: var(--secondary) !important;
    color: var(--bg) !important;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .hero-section {
        padding: 3rem 0;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
}