/**
 * GENEL STILLER VE DEĞİŞKENLER
 * Renk şeması, tipografi ve temel stillendirme
 */

/* ==================== CSS DEĞİŞKENLERİ ==================== */
:root {
    /* Renkler - Light Mode */
    --primary-color: #2d5016;      /* Kooperatif yeşili */
    --secondary-color: #52a552;    /* Açık yeşil */
    --accent-color: #d4a574;       /* Altın/krem */
    --dark-color: #1a1a1a;         /* Koyu gri */
    --light-color: #f5f5f5;        /* Açık gri */
    --white: #ffffff;
    --text-color: #1a1a1a;         /* Yazı rengi */
    --bg-color: #ffffff;           /* Arka plan rengi */
    --card-bg: #ffffff;            /* Kart arka planı */
    --border-color: #ddd;          /* Border rengi */
    --error-color: #dc3545;        /* Kırmızı */
    --success-color: #28a745;      /* Yeşil */
    
    /* Tipografi */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;
    
    /* Satır yükseklikleri */
    --line-height: 1.6;
    --line-height-tight: 1.3;
    
    /* Geçiş efektleri */
    --transition: all 0.3s ease;
    --transition-fast: all 0.2s ease;
    --transition-slow: all 0.5s ease;
    
    /* Gölgeler */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
    
    /* Border radius */
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
}

/* Dark Mode */
:root.dark-mode {
    --dark-color: #f5f5f5;         /* Yazı - beyaz */
    --light-color: #2a2a2a;        /* Arkaplan - koyu */
    --white: #1a1a1a;             /* Beyaz - koyu gri */
    --text-color: #f5f5f5;         /* Yazı rengi */
    --bg-color: #1a1a1a;          /* Arka plan rengi */
    --card-bg: #2a2a2a;           /* Kart arka planı */
    --border-color: #444;         /* Border rengi */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.4);
}

/* ==================== TEMEL STILLER ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: var(--line-height);
    font-size: var(--font-size-base);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ==================== TİPOGRAFİ ==================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-md);
    color: var(--text-color);
}

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);
}

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

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

a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* ==================== BUTONLAR ==================== */
button, .btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: var(--radius);
    transition: var(--transition);
    font-family: var(--font-family);
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    box-shadow: var(--shadow);
}

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

.btn-secondary:hover {
    background-color: #c69563;
    box-shadow: var(--shadow);
}

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

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

.btn-read-more {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    color: var(--secondary-color);
    font-weight: 600;
    transition: var(--transition-fast);
}

.btn-read-more:hover {
    transform: translateX(5px);
}

/* ==================== FORM ==================== */
input, textarea, select {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    background-color: var(--card-bg);
    color: var(--text-color);
    transition: var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(45, 80, 22, 0.1);
}

textarea {
    resize: vertical;
    min-height: 150px;
}

label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 600;
    color: var(--dark-color);
}

/* ==================== UYARILAR ==================== */
.alert {
    padding: var(--space-md);
    margin-bottom: var(--space-md);
    border-radius: var(--radius);
    position: relative;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.alert-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    opacity: 0.7;
    transition: var(--transition-fast);
}

.alert-close:hover {
    opacity: 1;
}

.alert ul {
    margin-left: var(--space-lg);
    margin-bottom: 0;
}

.alert li {
    margin-bottom: var(--space-sm);
}

/* ==================== KONTEYNERLER ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container-sm {
    max-width: 800px;
}

.container-lg {
    max-width: 1400px;
}

/* ==================== GRID LAYOUT ==================== */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ==================== FLEXBOX LAYOUT ==================== */
.flex {
    display: flex;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.flex-column {
    display: flex;
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.gap-sm {
    gap: var(--space-sm);
}

.gap-md {
    gap: var(--space-md);
}

.gap-lg {
    gap: var(--space-lg);
}

/* ==================== SPACING ==================== */
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.px-md { padding: 0 var(--space-md); }
.px-lg { padding: 0 var(--space-lg); }
.py-md { padding: var(--space-md) 0; }
.py-lg { padding: var(--space-lg) 0; }

/* ==================== VİZYBİLİTY ==================== */
.hidden { display: none !important; }
.visible { display: block !important; }

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

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.slide-in-left {
    animation: slideInLeft 0.6s ease forwards;
}

.slide-in-right {
    animation: slideInRight 0.6s ease forwards;
}

/* ==================== LOADER ==================== */
.loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    min-height: 200px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--light-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loader p {
    margin-top: var(--space-md);
    color: var(--primary-color);
    font-weight: 600;
}

/* ==================== CARD STILLER ==================== */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

/* ==================== SEKSİYONLAR ==================== */
section {
    padding: var(--space-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: #666;
}

/* ==================== BOŞLUK BULUNAMADI ==================== */
.no-content {
    text-align: center;
    padding: var(--space-2xl);
    color: #999;
    font-size: var(--font-size-lg);
}