/* ============================================
   HAYVAN DOSTLARI - MODERN THEME
   Yeşil & Beyaz Renk Şeması
   ============================================ */

:root {
    --primary-green: #10B981;
    --dark-green: #059669;
    --light-green: #D1FAE5;
    --lighter-green: #ECFDF5;
    --white: #FFFFFF;
    --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;
    --accent-emerald: #34D399;
    --accent-teal: #14B8A6;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', 'Segoe UI', sans-serif;
    color: var(--gray-800);
    background-color: var(--white);
    line-height: 1.6;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.875rem;
}

h4 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 1rem;
    color: var(--gray-600);
}

a {
    color: var(--primary-green);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ============================================
   CONTAINER & SPACING
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section {
    padding: 3rem 0;
}

.section.light {
    background-color: var(--lighter-green);
}

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

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

header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 2px solid var(--light-green);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark-green);
    z-index: 101;
}

.logo i {
    font-size: 1.75rem;
    color: var(--primary-green);
}

.nav-menu {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    list-style: none;
}

.nav-link {
    position: relative;
    color: var(--gray-700);
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
    font-size: 0.95rem;
}

.nav-link:hover {
    color: var(--primary-green);
}

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

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

.nav-link.active {
    color: var(--primary-green);
}

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

/* Mobil Menü Butonu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 101;
}

.mobile-menu-toggle i {
    font-size: 1.5rem;
    color: var(--primary-green);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-green), var(--accent-emerald));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--dark-green), var(--primary-green));
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
}

.btn-secondary:hover {
    background: var(--lighter-green);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: var(--lighter-green);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-whatsapp {
    background: #25D366;
    color: white;
}

.btn-whatsapp:hover {
    background: #128C7E;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--dark-green) 50%, var(--accent-teal) 100%);
    color: var(--white);
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(100px, -50px);
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    transform: translate(-50px, 100px);
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: center;
}

.hero-text h1 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
    line-height: 1.2;
}

.hero-text .highlight {
    background: linear-gradient(120deg, var(--accent-emerald), var(--accent-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    width: 100%;
    max-width: 500px;
    border-radius: 1rem;
    box-shadow: var(--shadow-2xl);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-15px);
    }
}

.hero-badge {
    position: absolute;
    bottom: -1rem;
    right: -1rem;
    background: var(--white);
    padding: 1rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-xl);
    text-align: center;
    animation: pulse 2s ease-in-out infinite;
}

.hero-badge .number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-green);
}

.hero-badge .label {
    color: var(--gray-600);
    font-size: 0.75rem;
    font-weight: 500;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

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

.card {
    background: var(--white);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--light-green);
}

.card-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-green), var(--accent-emerald));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    font-size: 1.75rem;
    color: var(--white);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--gray-900);
}

.card-text {
    color: var(--gray-600);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* ============================================
   GRID LAYOUTS
   ============================================ */

.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ============================================
   FEATURES SECTION
   ============================================ */

.features {
    background: var(--lighter-green);
}

.feature-item {
    text-align: center;
}

.feature-item .icon {
    font-size: 2.5rem;
    color: var(--primary-green);
    margin-bottom: 1rem;
}

.feature-item h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

/* ============================================
   STATS SECTION
   ============================================ */

.stats {
    background: linear-gradient(135deg, var(--primary-green), var(--dark-green));
    color: var(--white);
    padding: 3rem 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* ============================================
   TESTIMONIALS
   ============================================ */

.testimonial-card {
    background: var(--white);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-green);
    transition: all 0.3s ease;
}

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

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.testimonial-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-green), var(--accent-emerald));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 1.125rem;
}

.testimonial-name {
    font-weight: 700;
    color: var(--gray-900);
    font-size: 1.125rem;
}

.testimonial-role {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.testimonial-text {
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.testimonial-rating {
    color: #FBBF24;
    font-size: 0.875rem;
}

/* ============================================
   PRODUCT CARD
   ============================================ */

.product-card {
    background: var(--white);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-100);
}

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

.product-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--gray-100);
    position: relative;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.product-badge {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: var(--primary-green);
    color: var(--white);
    padding: 0.375rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.product-content {
    padding: 1.25rem;
}

.product-category {
    font-size: 0.75rem;
    color: var(--primary-green);
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.product-name {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.product-description {
    color: var(--gray-600);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin-bottom: 1rem;
    font-size: 0.75rem;
}

.product-rating .stars {
    color: #FBBF24;
}

.product-price {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.product-price .current {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-green);
}

.product-price .original {
    font-size: 0.875rem;
    color: var(--gray-400);
    text-decoration: line-through;
}

.product-price .discount {
    background: var(--primary-green);
    color: var(--white);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
}

/* ============================================
   SECTION TITLE
   ============================================ */

.section-title {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-title h2 {
    position: relative;
    display: inline-block;
    padding-bottom: 0.875rem;
    font-size: 2rem;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-green), var(--accent-emerald));
    border-radius: 2px;
}

.section-title p {
    font-size: 1rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0.75rem auto 0;
}

/* ============================================
   PRODUCT PAGE SPECIFIC
   ============================================ */

/* Product Gallery */
.product-gallery {
    display: grid;
    gap: 1rem;
}

.main-image {
    width: 100%;
    height: 400px;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--gray-100);
}

.main-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.main-image:hover img {
    transform: scale(1.05);
}

.thumbnail-list {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.thumbnail {
    width: 80px;
    height: 80px;
    border-radius: 0.5rem;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.thumbnail:hover,
.thumbnail.active {
    border-color: var(--primary-green);
    transform: scale(1.05);
}

.thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Product Info */
.product-info {
    padding: 1rem 0;
}

.product-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.product-price-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.current-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-green);
}

.original-price {
    font-size: 1.25rem;
    color: var(--gray-400);
    text-decoration: line-through;
}

.discount-badge {
    background: var(--primary-green);
    color: white;
    padding: 0.375rem 0.75rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
}

.rating-box {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.stars {
    color: #FBBF24;
}

.rating-text {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.product-description {
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.features-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--lighter-green);
    border-radius: 0.5rem;
    font-size: 0.875rem;
}

.feature-item i {
    color: var(--primary-green);
    font-size: 1rem;
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: 1.5rem;
    max-width: 200px;
}

.quantity-btn {
    width: 45px;
    height: 45px;
    border: 2px solid var(--gray-200);
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.125rem;
    color: var(--gray-700);
    transition: all 0.2s ease;
}

.quantity-btn:first-child {
    border-radius: 0.5rem 0 0 0.5rem;
}

.quantity-btn:last-child {
    border-radius: 0 0.5rem 0.5rem 0;
}

.quantity-btn:hover {
    background: var(--gray-50);
    border-color: var(--primary-green);
}

.quantity-input {
    width: 60px;
    height: 45px;
    text-align: center;
    border: 2px solid var(--gray-200);
    border-left: none;
    border-right: none;
    font-size: 1.125rem;
    font-weight: 600;
    -moz-appearance: textfield;
    background: var(--white);
}

.quantity-input::-webkit-outer-spin-button,
.quantity-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-buy {
    flex: 1;
    min-width: 200px;
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--gray-200);
    margin-bottom: 1.5rem;
    overflow-x: auto;
    white-space: nowrap;
}

.tabs::-webkit-scrollbar {
    height: 4px;
}

.tabs::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 2px;
}

.tab-btn {
    padding: 0.75rem 1.25rem;
    border: none;
    background: none;
    font-weight: 600;
    color: var(--gray-500);
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.tab-btn:hover {
    color: var(--primary-green);
}

.tab-btn.active {
    color: var(--primary-green);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-green);
    border-radius: 3px 3px 0 0;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

/* Comments */
.comment-card {
    background: var(--white);
    border-radius: 1rem;
    padding: 1.25rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--primary-green);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.comment-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.comment-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-green), var(--accent-emerald));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.author-name {
    font-weight: 600;
    color: var(--gray-900);
    font-size: 1rem;
}

.comment-date {
    font-size: 0.75rem;
    color: var(--gray-400);
}

.comment-text {
    color: var(--gray-600);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Breadcrumb */
.breadcrumb {
    background: var(--lighter-green);
    padding: 0.75rem 0;
    font-size: 0.875rem;
    color: var(--gray-500);
}

.breadcrumb a {
    color: var(--primary-green);
}

.breadcrumb span {
    margin: 0 0.375rem;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
    background: var(--gray-900);
    color: var(--white);
    padding: 2rem 0 1rem;
    margin-top: 3rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    line-height: 1.6;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
    font-size: 0.875rem;
}

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

.footer-contact {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.footer-contact i {
    color: var(--primary-green);
    font-size: 1rem;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

.social-link {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all 0.3s ease;
    font-size: 0.875rem;
}

.social-link:hover {
    background: var(--primary-green);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.75rem;
}

.footer-bottom p {
    margin: 0;
}

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

.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.95rem;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background: var(--white);
    color: var(--gray-900);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

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

/* ============================================
   ALERTS
   ============================================ */

.alert {
    padding: 0.875rem 1.25rem;
    border-radius: 0.5rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
}

.alert-success {
    background: var(--lighter-green);
    color: var(--dark-green);
    border-left: 4px solid var(--primary-green);
}

.alert-error {
    background: #FEE2E2;
    color: #991B1B;
    border-left: 4px solid #DC2626;
}

.alert-warning {
    background: #FEF3C7;
    color: #92400E;
    border-left: 4px solid #F59E0B;
}

.alert-info {
    background: #DBEAFE;
    color: #1E40AF;
    border-left: 4px solid #3B82F6;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet - 768px ve altı */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.375rem;
    }

    .section {
        padding: 2rem 0;
    }

    /* Mobil Menü */
    .mobile-menu-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-lg);
        z-index: 1000;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu a {
        display: block;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--gray-100);
        width: 100%;
    }

    /* Hero */
    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }

    /* Product Page Layout */
    .product-layout {
        grid-template-columns: 1fr !important;
        gap: 2rem;
    }

    .main-image {
        height: 350px;
    }

    .product-title {
        font-size: 1.5rem;
    }

    .current-price {
        font-size: 1.75rem;
    }

    .features-list {
        grid-template-columns: 1fr;
    }

    .thumbnail {
        width: 70px;
        height: 70px;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn-buy {
        width: 100%;
        min-width: unset;
    }

    .tabs {
        justify-content: flex-start;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-contact {
        justify-content: center;
    }

    .footer-social {
        justify-content: center;
    }
}

/* Telefon - 480px ve altı */
@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }

    .btn-large {
        padding: 0.875rem 1.75rem;
    }

    .hero {
        padding: 3rem 0;
    }

    .hero-text h1 {
        font-size: 1.75rem;
    }

    .main-image {
        height: 300px;
    }

    .product-title {
        font-size: 1.375rem;
    }

    .current-price {
        font-size: 1.5rem;
    }

    .quantity-selector {
        max-width: 100%;
    }

    .quantity-btn {
        width: 40px;
        height: 40px;
    }

    .quantity-input {
        width: 50px;
        height: 40px;
    }

    .tab-btn {
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
    }

    .comment-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .comment-date {
        margin-left: 3.25rem;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

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

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

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

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }

.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }

.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }

.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

.rounded { border-radius: 0.375rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-full { border-radius: 9999px; }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.max-w-2xl { max-width: 42rem; }
.max-w-4xl { max-width: 56rem; }

/* Product Layout Utility */
.product-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

@media (max-width: 768px) {
    .product-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}