/**
 * Mobile-First Responsive CSS Framework
 * Tüm ekran boyutları için optimize edilmiş
 */

/* ============================================
   RESET & BASE
   ============================================ */

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ============================================
   CONTAINER & GRID SYSTEM
   ============================================ */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.container-fluid {
    width: 100%;
    padding: 0 15px;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

/* Columns */
[class*="col-"] {
    padding: 0 15px;
    width: 100%;
}

/* Mobile First - Default 100% */
.col-1 { width: 8.33%; }
.col-2 { width: 16.66%; }
.col-3 { width: 25%; }
.col-4 { width: 33.33%; }
.col-5 { width: 41.66%; }
.col-6 { width: 50%; }
.col-7 { width: 58.33%; }
.col-8 { width: 66.66%; }
.col-9 { width: 75%; }
.col-10 { width: 83.33%; }
.col-11 { width: 91.66%; }
.col-12 { width: 100%; }

/* Tablet (768px+) */
@media (min-width: 768px) {
    .col-md-1 { width: 8.33%; }
    .col-md-2 { width: 16.66%; }
    .col-md-3 { width: 25%; }
    .col-md-4 { width: 33.33%; }
    .col-md-5 { width: 41.66%; }
    .col-md-6 { width: 50%; }
    .col-md-7 { width: 58.33%; }
    .col-md-8 { width: 66.66%; }
    .col-md-9 { width: 75%; }
    .col-md-10 { width: 83.33%; }
    .col-md-11 { width: 91.66%; }
    .col-md-12 { width: 100%; }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    .col-lg-1 { width: 8.33%; }
    .col-lg-2 { width: 16.66%; }
    .col-lg-3 { width: 25%; }
    .col-lg-4 { width: 33.33%; }
    .col-lg-5 { width: 41.66%; }
    .col-lg-6 { width: 50%; }
    .col-lg-7 { width: 58.33%; }
    .col-lg-8 { width: 66.66%; }
    .col-lg-9 { width: 75%; }
    .col-lg-10 { width: 83.33%; }
    .col-lg-11 { width: 91.66%; }
    .col-lg-12 { width: 100%; }
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.header {
    position: sticky;
    top: 0;
    background: var(--header-bg);
    box-shadow: 0 2px 10px var(--shadow);
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.navbar-brand img {
    height: 40px;
}

/* Mobile Menu Toggle */
.navbar-toggler {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 10px;
}

.navbar-menu {
    display: flex;
    gap: 30px;
    list-style: none;
}

.navbar-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.navbar-menu a:hover {
    color: var(--link-color);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .navbar-toggler {
        display: block;
    }
    
    .navbar-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: calc(100vh - 70px);
        background: var(--card-bg);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: 2px 0 10px var(--shadow);
        transition: left 0.3s ease;
        overflow-y: auto;
    }
    
    .navbar-menu.active {
        left: 0;
    }
    
    .navbar-menu a {
        padding: 12px 15px;
        border-bottom: 1px solid var(--border-color);
        display: block;
    }
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--button-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-block {
    width: 100%;
    display: block;
}

/* Mobile Button Optimization */
@media (max-width: 768px) {
    .btn {
        padding: 15px 25px;
        font-size: 16px;
        min-height: 48px; /* Touch target minimum */
    }
}

/* ============================================
   FORMS
   ============================================ */

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    font-size: 16px; /* Prevents zoom on iOS */
    border: 1px solid var(--input-border);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text-primary);
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--button-primary);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    padding-right: 40px;
}

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

.form-check {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Mobile Form Optimization */
@media (max-width: 768px) {
    .form-control {
        padding: 15px;
        font-size: 16px; /* Prevent iOS zoom */
        min-height: 48px;
    }
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px var(--shadow);
}

.card-header {
    padding-bottom: 15px;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 15px 0;
}

.card-footer {
    padding-top: 15px;
    margin-top: 15px;
    border-top: 1px solid var(--border-color);
}

/* ============================================
   PRODUCT CARDS
   ============================================ */

.product-card {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s;
}

.product-card:hover {
    box-shadow: 0 8px 25px var(--shadow);
    transform: translateY(-5px);
}

.product-image {
    position: relative;
    width: 100%;
    padding-top: 100%; /* 1:1 Aspect Ratio */
    overflow: hidden;
    background: #f5f5f5;
}

.product-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-info {
    padding: 15px;
}

.product-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.product-price {
    font-size: 20px;
    font-weight: 700;
    color: var(--button-primary);
    margin-bottom: 10px;
}

.product-actions {
    display: flex;
    gap: 10px;
}

/* Mobile Product Grid */
@media (max-width: 576px) {
    .products-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .product-info {
        padding: 10px;
    }
    
    .product-title {
        font-size: 14px;
    }
    
    .product-price {
        font-size: 16px;
    }
}

@media (min-width: 577px) and (max-width: 768px) {
    .products-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }
}

@media (min-width: 769px) {
    .products-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }
}

/* ============================================
   UTILITIES
   ============================================ */

/* Spacing */
.mt-1 { margin-top: 8px !important; }
.mt-2 { margin-top: 16px !important; }
.mt-3 { margin-top: 24px !important; }
.mt-4 { margin-top: 32px !important; }
.mt-5 { margin-top: 48px !important; }

.mb-1 { margin-bottom: 8px !important; }
.mb-2 { margin-bottom: 16px !important; }
.mb-3 { margin-bottom: 24px !important; }
.mb-4 { margin-bottom: 32px !important; }
.mb-5 { margin-bottom: 48px !important; }

.p-1 { padding: 8px !important; }
.p-2 { padding: 16px !important; }
.p-3 { padding: 24px !important; }
.p-4 { padding: 32px !important; }
.p-5 { padding: 48px !important; }

/* Text Alignment */
.text-left { text-align: left !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }

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

/* Flex */
.justify-center { justify-content: center !important; }
.justify-between { justify-content: space-between !important; }
.align-center { align-items: center !important; }
.flex-column { flex-direction: column !important; }
.flex-wrap { flex-wrap: wrap !important; }

/* Mobile Utilities */
@media (max-width: 768px) {
    .hide-mobile { display: none !important; }
    .show-mobile { display: block !important; }
}

@media (min-width: 769px) {
    .hide-desktop { display: none !important; }
    .show-desktop { display: block !important; }
}

/* ============================================
   TOUCH OPTIMIZATIONS
   ============================================ */

/* Minimum touch target size */
button,
a,
input[type="button"],
input[type="submit"],
.clickable {
    min-height: 44px;
    min-width: 44px;
}

/* Prevent text selection on buttons */
button,
.btn {
    -webkit-user-select: none;
    user-select: none;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* ============================================
   LOADING & ANIMATIONS
   ============================================ */

.loading {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--button-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ============================================
   MODALS (Mobile Optimized)
   ============================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 20px;
}

.modal {
    background: var(--card-bg);
    border-radius: 12px;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px var(--shadow);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

@media (max-width: 576px) {
    .modal {
        max-width: 100%;
        border-radius: 12px 12px 0 0;
        margin-top: auto;
    }
    
    .modal-overlay {
        align-items: flex-end;
        padding: 0;
    }
}

/* ============================================
   RESPONSIVE TABLES
   ============================================ */

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    table {
        font-size: 14px;
    }
    
    table th,
    table td {
        padding: 10px;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .no-print {
        display: none !important;
    }
}