/**
 * FRONTEND.CSS
 * Ortak Frontend Stilleri - Mobile First
 * Corporate Color: #F75700
 */

/* ============================================
   GOOGLE FONTS - Inter
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ============================================
   CSS VARIABLES (Design Tokens)
   ============================================ */
:root {
    /* Colors - Primary (default values, overridden by theme settings via inline styles) */
    --primary: #F75700;
    --primary-dark: #d64900;
    --primary-light: #ff6f1a;
    --primary-lightest: #fff3eb;
    
    /* Colors - Secondary */
    --secondary: #667eea;
    --secondary-dark: #5568d3;
    --secondary-light: #8599ff;
    
    /* Colors - Grayscale */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Colors - Semantic */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    
    /* Spacing */
    --space-1: 0.25rem;  /* 4px */
    --space-2: 0.5rem;   /* 8px */
    --space-3: 0.75rem;  /* 12px */
    --space-4: 1rem;     /* 16px */
    --space-5: 1.25rem;  /* 20px */
    --space-6: 1.5rem;   /* 24px */
    --space-8: 2rem;     /* 32px */
    --space-10: 2.5rem;  /* 40px */
    --space-12: 3rem;    /* 48px */
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 12px 24px rgba(0,0,0,0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ============================================
   RESET & BASE
   ============================================ */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Mobile base font size adjustment */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-900);
    background: var(--gray-50);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

/* Mobile Typography Adjustments */
@media (max-width: 768px) {
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }
    h4 { font-size: var(--font-size-lg); }
    h5 { font-size: var(--font-size-base); }
    h6 { font-size: var(--font-size-sm); }
    
    body {
        font-size: var(--font-size-sm);
        line-height: var(--line-height-normal);
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.5rem; }   /* 24px */
    h2 { font-size: 1.25rem; }  /* 20px */
    h3 { font-size: 1.125rem; } /* 18px */
    h4 { font-size: 1rem; }     /* 16px */
    h5 { font-size: 0.9375rem; } /* 15px */
    h6 { font-size: 0.875rem; }  /* 14px */
    
    body {
        font-size: 0.875rem; /* 14px */
        line-height: 1.5;
    }
    
    p {
        font-size: 0.875rem;
        margin-bottom: var(--space-3);
    }
}

p {
    margin-bottom: var(--space-4);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
    min-height: 44px; /* Touch-friendly */
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--gray-300);
    color: var(--gray-700);
}

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

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    min-height: 36px;
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-lg);
    min-height: 52px;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-slow);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    padding: var(--space-5);
    border-bottom: 1px solid var(--gray-200);
}

.card-body {
    padding: var(--space-5);
}

.card-footer {
    padding: var(--space-5);
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
}

/* ============================================
   BADGES
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    line-height: 1;
}

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

.badge-secondary {
    background: var(--secondary);
    color: white;
}

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

.badge-warning {
    background: var(--warning);
    color: white;
}

.badge-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--gray-700);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-sans);
    transition: all var(--transition-base);
    min-height: 44px; /* Touch-friendly */
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb, 247, 87, 0), 0.1);
}

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

/* ============================================
   GRID SYSTEM
   ============================================ */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(var(--space-4) * -1);
}

.col {
    flex: 1;
    padding: 0 var(--space-4);
}

/* Grid columns */
@media (min-width: 768px) {
    .col-md-6 { flex: 0 0 50%; max-width: 50%; }
    .col-md-4 { flex: 0 0 33.333%; max-width: 33.333%; }
    .col-md-3 { flex: 0 0 25%; max-width: 25%; }
}

/* ============================================
   UTILITIES
   ============================================ */
/* Display */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

/* Flexbox */
.flex-column { flex-direction: column !important; }
.flex-wrap { flex-wrap: wrap !important; }
.justify-start { justify-content: flex-start !important; }
.justify-center { justify-content: center !important; }
.justify-between { justify-content: space-between !important; }
.align-start { align-items: flex-start !important; }
.align-center { align-items: center !important; }
.align-end { align-items: flex-end !important; }
.gap-2 { gap: var(--space-2) !important; }
.gap-4 { gap: var(--space-4) !important; }

/* Text */
.text-left { text-align: left !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }
.text-primary { color: var(--primary) !important; }
.text-secondary { color: var(--secondary) !important; }
.text-muted { color: var(--gray-600) !important; }
.text-sm { font-size: var(--font-size-sm) !important; }
.text-lg { font-size: var(--font-size-lg) !important; }
.font-bold { font-weight: 700 !important; }
.font-normal { font-weight: 400 !important; }

/* Spacing */
.m-0 { margin: 0 !important; }
.mt-4 { margin-top: var(--space-4) !important; }
.mb-4 { margin-bottom: var(--space-4) !important; }
.p-0 { padding: 0 !important; }
.pt-4 { padding-top: var(--space-4) !important; }
.pb-4 { padding-bottom: var(--space-4) !important; }

/* Width */
.w-full { width: 100% !important; }
.w-auto { width: auto !important; }

/* ============================================
   RESPONSIVE (Mobile First)
   ============================================ */
@media (max-width: 767px) {
    :root {
        --font-size-4xl: 1.75rem; /* Daha küçük başlıklar mobilde */
        --font-size-3xl: 1.5rem;
    }
    
    .container {
        padding: 0 var(--space-3);
    }
    
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
}

@media (min-width: 768px) {
    .d-md-none { display: none !important; }
    .d-md-block { display: block !important; }
    .d-md-flex { display: flex !important; }
}

@media (min-width: 1024px) {
    .d-lg-none { display: none !important; }
    .d-lg-block { display: block !important; }
    .d-lg-flex { display: flex !important; }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn var(--transition-slow) ease-out;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ============================================
   LOADING STATES
   ============================================ */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--gray-200) 25%,
        var(--gray-100) 50%,
        var(--gray-200) 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ============================================
   ACCESSIBILITY
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus visible */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}