/* ============================================
   RESET & BASE STYLES
   /tema/css/core/base.css
============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

/* CRITICAL: Beyaz flash önleme - Sayfa yüklenmeden arka plan ayarla */
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    background-color: #f8f9fa; /* Light mode varsayılan */
    transition: background-color 0.3s ease;
}

/* Dark mode arka plan - data-theme attribute ile */
html[data-theme="dark"] {
    background-color: #0f172a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "Segoe UI", system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    overscroll-behavior: none;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.5;
    transition: background-color var(--transition-base), color var(--transition-base);
    min-height: 100vh;
}

/* Sabit arka plan overlay - sayfa geçişlerinde flash önler */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-primary);
    z-index: -1;
    pointer-events: none;
}

/* Utility Classes */
.container {
    padding: var(--spacing-md);
    padding-bottom: 90px;
    max-width: 100%;
    animation: fadeIn 0.2s ease-in;
}

/* Sayfa yüklenme animasyonu */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden { display: none !important; }
.visible { display: block !important; }

/* Responsive */
@media (min-width: 768px) {
    .container {
        max-width: 600px;
        margin: 0 auto;
    }
}

@media (max-width: 375px) {
    html { font-size: 14px; }
}