/**
 * Site-wide CSS Variables
 * izzetince.com.tr - Merkezi Tema Dosyası
 * ========================================
 */

:root {
    /* === Primary Colors === */
    --color-primary: #11998e;
    --color-primary-light: #38ef7d;
    --color-primary-dark: #0d7d74;
    --color-secondary: #4ecdc4;
    --color-accent: #f093fb;
    --color-accent-2: #f5576c;

    /* === Background Colors === */
    --bg-dark: #0a0e1a;
    --bg-card: #101728;
    --bg-card-hover: #151d30;
    --bg-overlay: rgba(10, 14, 26, 0.95);

    /* === Text Colors === */
    --text-primary: #f5f7ff;
    --text-secondary: #a0aec0;
    --text-muted: #6b7280;
    --text-link: var(--color-primary-light);

    /* === Border & Outline === */
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --outline-focus: var(--color-primary);

    /* === Gradients === */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    --gradient-accent: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
    --gradient-bg: radial-gradient(ellipse at top, rgba(17, 153, 142, 0.1), transparent 50%);

    /* === Shadows === */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(17, 153, 142, 0.3);

    /* === Typography === */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    --font-size-4xl: 36px;
    --font-size-5xl: 48px;

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.65;

    /* === Spacing === */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;

    /* === Border Radius === */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* === Transitions === */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* === Z-Index Scale === */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-tooltip: 500;

    /* === Container === */
    --container-max: 1200px;
    --container-padding: 24px;

    /* === Navbar === */
    --navbar-height: 70px;
    --navbar-bg: var(--bg-overlay);
}

/* === Dark Mode (default) === */
[data-theme="dark"] {
    --bg-dark: #0a0e1a;
    --bg-card: #101728;
    --text-primary: #f5f7ff;
    --text-secondary: #a0aec0;
}

/* === Light Mode === */
[data-theme="light"] {
    --bg-dark: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --bg-overlay: rgba(255, 255, 255, 0.95);
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
}

/* === Course-specific accent colors === */
[data-course="istatistik"] { --color-accent-course: #3498db; }
[data-course="bilimsel-arastirma"] { --color-accent-course: #667eea; }
[data-course="kuvvet"] { --color-accent-course: #e74c3c; }
[data-course="monitorizasyon"] { --color-accent-course: #9b59b6; }
[data-course="sporcu-beslenmesi"] { --color-accent-course: #11998e; }
[data-course="cocuk-spor"] { --color-accent-course: #11998e; }
[data-course="biyomekanik"] { --color-accent-course: #e67e22; }

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}