/* Sellityet Design System — Dark Mode Standard, Apple-inspirierte Grautöne */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #0A84FF;
    --primary-dark: #0066CC;
    --surface: #1C1C1E;
    --surface-alt: #2C2C2E;
    --surface-elevated: #3A3A3C;
    --text-primary: #F5F5F7;
    --text-secondary: #AEAEB2;
    --text-muted: #636366;
    --accent: #30D158;
    --danger: #FF453A;
    --warning: #FFD60A;
    --border: #38383A;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background: var(--surface);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Header */
.site-header {
    background: rgba(28, 28, 30, 0.85);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(20px);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-logo {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 18px;
}

.brand-text {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
    font-family: inherit;
}

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

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

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

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

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

/* Cards */
.card {
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    background: var(--surface-elevated);
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(10, 132, 255, 0.25);
}

/* Footer */
.site-footer {
    background: var(--surface-alt);
    border-top: 1px solid var(--border);
    padding: 32px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

.site-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    margin: 0 12px;
}

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

/* Typography hierarchy */
h1 { font-size: 2.5rem; font-weight: 700; letter-spacing: -0.5px; }
h2 { font-size: 1.75rem; font-weight: 600; letter-spacing: -0.3px; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; color: var(--text-secondary); }

/* Responsive — Mobile First */
@media (max-width: 768px) {
    .header-container {
        padding: 0 16px;
    }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.35rem; }
}