* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    font-family: 'Arial', sans-serif;
    /* background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); */
    min-height: 100vh;
}

/* ==========================
   Main Container
========================== */
.main-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    margin: 20px auto;
    max-width: 1200px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

/* ==========================
   Header Section
========================== */
.header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #2c3e50, #3498db);
    color: white;
    border-radius: 15px 15px 0 0;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.header h1 {
    margin: 0;
    font-size: 3em;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.header p {
    font-size: 1.2em;
    margin: 10px 0 0 0;
    opacity: 0.9;
}

/* ==========================
   Hero Search Section
========================== */
.hero {
    background: linear-gradient(rgb(106 157 229 / 50%), rgb(146 237 154 / 50%)), url(findbattery) center center / cover no-repeat;
    min-height: 60vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 60px 20px 0;
    box-sizing: border-box;
}

.search-box {
    background-color: rgba(255, 255, 255, 0.95);
    padding: 20px 25px;
    border-radius: 15px;
    box-shadow: 0 12px 25px rgba(0,0,0,0.25);
    width: 100%;
    max-width: 750px;
    box-sizing: border-box;
}

.search-box h2 {
    text-align: center;
    margin-bottom: 15px;
    color: #333;
    font-weight: 600;
}

.input-group-flex {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.input-group-flex .form-control,
.input-group-flex select {
    border-radius: 25px;
    padding: 12px 20px;
    border: 1px solid #ccc;
    height: 45px;
    flex: 1 1 auto;
    min-width: 120px;
    box-sizing: border-box;
}

.btn-search {
    border-radius: 25px;
    background-color: #337ab7;
    border: none;
    padding: 12px 25px;
    font-size: 16px;
    font-weight: 500;
    color: #fff;
    transition: background 0.3s ease;
    flex: 0 0 auto;
    height: 45px;
}

.btn-search:hover {
    background-color: #286090;
}

/* ==========================
   Filter Section
========================== */
.filter-section {
    padding: 30px 20px;
    background: #f8f9fa;
    border-bottom: 1px solid #eee;
    text-align: center;
}

.filter-section h3 {
    margin-bottom: 20px;
    color: #2c3e50;
}

.filter-btn {
    margin: 5px;
    padding: 8px 20px;
    border: 2px solid #3498db;
    background: transparent;
    color: #3498db;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: bold;
    cursor: pointer;
}

.filter-btn:hover,
.filter-btn.active {
    background: #3498db;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

/* ==========================
   Product Section
========================== */
.products-section {
    padding: 40px 20px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.product-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.product-image {
    position: relative;
    height: 250px;
    background: linear-gradient(45deg, #90a7e6, #c7e7c1);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-image i {
    font-size: 4em;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.product-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: #e74c3c;
    color: white;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.8em;
    font-weight: bold;
}

.product-info {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.product-title,
.product-title6,
.product-title7 {
    font-weight: bold;
    color: #2c3e50;
    margin: 0 0 10px;
}
.product-title { font-size: 1.3em; }
.product-title6 { font-size: 1.1em; }
.product-title7 { font-size: 1em; margin: 10px 0; }

.product-description {
    color: #7f8c8d;
    margin-bottom: 15px;
    font-size: 0.9em;
    line-height: 1.5;
    flex: 1;
}

.rating {
    color: #f39c12;
    margin-bottom: 15px;
}

.product-price {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.price {
    font-size: 1.5em;
    font-weight: bold;
    color: #ffffff;
}

.original-price {
    text-decoration: line-through;
    color: #ff0a0a;
    font-size: 1.2em;
    font-weight: 800;
}

.btn-purchase {
    width: 100%;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border: none;
    color: white;
    padding: 12px;
    border-radius: 8px;
    font-weight: bold;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
}

.btn-purchase:hover {
    background: linear-gradient(135deg, #2980b9, #1f5f8b);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

/* ==========================
   Stats Section
========================== */
.stats-section {
    background: #2c3e50;
    color: white;
    padding: 40px 20px;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: 2.5em;
    font-weight: bold;
    display: block;
}

.stat-label {
    font-size: 1em;
    opacity: 0.8;
    margin-top: 5px;
}

/* ==========================
   Animation Classes
========================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================
   Responsive Design
========================== */
@media (max-width: 1200px) {
    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .header h1 { font-size: 2em; }
    .main-container { margin: 10px; border-radius: 10px; }
    .products-grid { grid-template-columns: 1fr; gap: 20px; }
    .filter-section { padding: 20px 15px; }
    .filter-btn { padding: 6px 15px; font-size: 0.9em; margin: 3px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .stat-number { font-size: 2em; }

    .input-group-flex { flex-direction: column; }
    .input-group-flex .form-control,
    .input-group-flex select,
    .btn-search { width: 100%; }
}

@media (max-width: 480px) {
    .header { padding: 30px 15px; }
    .header h1 { font-size: 1.8em; }
    .products-section { padding: 20px 15px; }
    .stats-grid { grid-template-columns: 1fr; }
}