/* ===== GENEL AYARLAR ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4A90E2;
    --secondary-color: #6C63FF;
    --dark-color: #2C3E50;
    --light-gray: #F8F9FA;
    --gray: #E9ECEF;
    --text-color: #333333;
    --text-light: #6C757D;
    --success: #28A745;
    --danger: #DC3545;
    --warning: #FFC107;
    --white: #FFFFFF;
    --shadow: 0 2px 10px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

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

/* ===== LOADING SCREEN ===== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-screen.fade-out {
    opacity: 0;
}

.loader {
    text-align: center;
    color: var(--white);
}

.loader-circle {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.loader-text {
    font-size: 16px;
    font-weight: 500;
}

/* ===== FLASH MESSAGES ===== */
.flash-message {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: var(--border-radius);
    background: var(--white);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 9998;
    min-width: 300px;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.flash-message.fade-out {
    animation: slideOutRight 0.3s ease;
}

@keyframes slideOutRight {
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

.flash-success {
    border-left: 4px solid var(--success);
    color: var(--success);
}

.flash-error {
    border-left: 4px solid var(--danger);
    color: var(--danger);
}

.flash-warning {
    border-left: 4px solid var(--warning);
    color: var(--warning);
}

.flash-close {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    margin-left: auto;
    opacity: 0.5;
    transition: var(--transition);
}

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

/* ===== HEADER ===== */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo img {
    height: 40px;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: var(--transition);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

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

.nav-link {
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius);
    list-style: none;
    min-width: 250px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-color);
}

.dropdown-menu li a:hover {
    background: var(--light-gray);
    color: var(--primary-color);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-icon {
    position: relative;
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-color);
}

.cart-icon {
    position: relative;
}

.cart-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--danger);
    color: var(--white);
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 600;
}

.user-menu {
    position: relative;
}

.user-icon {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius);
    min-width: 200px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    margin-top: 10px;
}

.user-menu:hover .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-color);
}

.user-dropdown a:hover {
    background: var(--light-gray);
    color: var(--primary-color);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(74, 144, 226, 0.3);
}

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

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

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

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

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

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

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 18px;
}

/* ===== HERO SECTION ===== */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--light-gray), var(--white));
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 30px;
}

.hero-image {
    text-align: center;
}

.hero-image img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
}

/* ===== SECTIONS ===== */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
}

/* ===== PRODUCT GRID ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.product-image {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: var(--light-gray);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--danger);
    color: var(--white);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.product-info {
    padding: 20px;
}

.product-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-color);
}

.product-description {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 15px;
}

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

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

.price-current {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.price-original {
    font-size: 14px;
    text-decoration: line-through;
    color: var(--text-light);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3, .footer-col h4 {
    margin-bottom: 20px;
}

.footer-col p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    gap: 10px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-links a:hover {
    color: var(--white);
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.8);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ===== BACK TO TOP ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}

/* ===== FORM STYLES ===== */
.form-group {
    margin-bottom: 20px;
}

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

.form-control {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--gray);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 16px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .mobile-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        padding: 30px;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        width: 100%;
    }
    
    .nav-actions {
        width: 100%;
        flex-direction: column;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
    }
    
    .hero-text h1 {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
}