:root {
    --bg-black: #050505;
    --bg-dark: #121212;
    --primary: #f5f5f5;
    --accent: #ff4d00;
    --text-white: #ffffff;
    --text-gray: #a0a0a0;
    --border: rgba(255,255,255,0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: #000;
    color: var(--text-white);
    overflow: hidden;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
    max-width: 450px;
    margin: 0 auto;
    background-color: var(--bg-black);
    position: relative;
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    z-index: 100;
    background: linear-gradient(180deg, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0) 100%);
    position: absolute;
    width: 100%;
}

.logo {
    font-size: 1.2rem;
    font-weight: 900;
    letter-spacing: 2px;
}

.logo span {
    color: var(--accent);
}

.header-actions {
    display: flex;
    gap: 15px;
}

.cart-icon {
    position: relative;
    font-size: 1.2rem;
    cursor: pointer;
}

#cart-count {
    position: absolute;
    top: -8px;
    right: -10px;
    background: var(--accent);
    color: white;
    font-size: 0.65rem;
    padding: 2px 5px;
    border-radius: 10px;
    font-weight: 800;
}

main {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 90px;
}

/* Hero */
.hero {
    height: 300px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    padding: 40px 20px;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.2) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 2.5rem;
    font-weight: 900;
    line-height: 1;
}

.hero-content h1 span {
    color: var(--accent);
    display: block;
}

.hero-content p {
    color: var(--text-gray);
    margin-top: 10px;
    font-size: 0.9rem;
}

/* Filter Bar */
.filter-bar {
    display: flex;
    gap: 10px;
    padding: 20px;
    overflow-x: auto;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-gray);
    padding: 10px 20px;
    border-radius: 30px;
    white-space: nowrap;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-btn.active {
    background: var(--text-white);
    color: var(--bg-black);
    border-color: var(--text-white);
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    padding: 0 20px;
}

.product-card {
    background: var(--bg-dark);
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border);
}

.product-img-container {
    height: 180px;
    background: #1a1a1a;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.product-img-container img {
    width: 80%;
    height: 80%;
    object-fit: contain;
}

.tag {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--accent);
    font-size: 0.6rem;
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 800;
    text-transform: uppercase;
}

.product-info {
    padding: 15px;
}

.product-info h3 {
    font-size: 0.95rem;
    margin-bottom: 5px;
}

.product-info p {
    font-size: 0.75rem;
    color: var(--text-gray);
    margin-bottom: 12px;
}

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

.price {
    font-weight: 700;
}

.btn-buy {
    width: 32px;
    height: 32px;
    background: var(--text-white);
    color: var(--bg-black);
    border: none;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    align-items: flex-end;
}

.modal.active { display: flex; }

.modal-content {
    background: var(--bg-dark);
    width: 100%;
    border-radius: 30px 30px 0 0;
    padding: 30px;
    height: 85vh;
    animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow-y: auto;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.close-modal {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255,255,255,0.1);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: white;
    cursor: pointer;
}

.modal-img {
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-img img {
    height: 100%;
    object-fit: contain;
}

.modal-info h2 { font-size: 1.8rem; margin-bottom: 10px; }
.modal-price { color: var(--accent); font-size: 1.5rem; font-weight: 800; margin-bottom: 25px; }

.option-group label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-gray);
    margin-bottom: 15px;
    letter-spacing: 1px;
}

.size-selector {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
}

.size-btn {
    width: 50px;
    height: 50px;
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 700;
    cursor: pointer;
}

.size-btn.active {
    background: var(--text-white);
    color: var(--bg-black);
    border-color: var(--text-white);
}

.btn-add-to-cart {
    width: 100%;
    background: var(--accent);
    color: white;
    border: none;
    padding: 20px;
    border-radius: 20px;
    font-weight: 800;
    font-size: 1.1rem;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(255, 77, 0, 0.3);
}

/* Toast */
.toast {
    position: fixed;
    bottom: -100px;
    left: 20px;
    right: 20px;
    background: #10b981;
    color: white;
    padding: 15px;
    border-radius: 15px;
    text-align: center;
    font-weight: 700;
    z-index: 2000;
    transition: all 0.4s;
}

.toast.active { bottom: 20px; }

/* Tab Bar */
.tab-bar {
    position: absolute;
    bottom: 0;
    width: 100%;
    background: rgba(0,0,0,0.9);
    display: flex;
    justify-content: space-around;
    padding: 15px;
    border-top: 1px solid var(--border);
}

.tab-item {
    background: transparent;
    border: none;
    color: var(--text-gray);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    font-size: 0.65rem;
}

.tab-item.active { color: var(--text-white); }
.tab-item i { font-size: 1.1rem; }