:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #ea580c;

    --bg: #f8fafc;
    --surface: #ffffff;
    --surface-2: #f1f5f9;
    --border: #e2e8f0;
    --bg-black: #303030;

    --text: #0f172a;
    --text-light: #ffffff;

    --radius: 14px;
    --radius-sm: 10px;

    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.05);

    --container: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    line-height: 0;
    display: block;
}

button,
input,
textarea,
select {
    font: inherit;
}

.container {
    width: min(var(--container), calc(100% - 2rem));
    margin-inline: auto;
}

.section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-body {
    padding: 1.25rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card-text {
    color: var(--text-light);
    font-size: 0.95rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: none;
    border-radius: var(--radius-sm);
    padding: 0.9rem 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--surface-2);
    color: var(--text);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-block {
    width: 100%;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.9rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    transition: border-color 0.2s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 700;
}

.badge-success {
    background: rgba(22, 163, 74, 0.12);
    color: var(--success);
}

.badge-warning {
    background: rgba(234, 88, 12, 0.12);
    color: var(--warning);
}

.badge-danger {
    background: rgba(220, 38, 38, 0.12);
    color: var(--danger);
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-light);
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.hidden {
    display: none !important;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}