:root {
    --primary-color: #2abee8;
    --primary-hover: #22a3c9;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #1a1d20;
    --text-muted: #6c757d;
    --border-color: #edf2f7;
    --radius: 12px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.08);
    --danger-color: #ff4d4f;
}

/* Telegram Native Dark Mode Override */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #121212;
        --card-bg: #1e1e1e;
        --text-color: #e4e6eb;
        --text-muted: #b0b3b8;
        --border-color: #2d2d2d;
        --shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    padding-bottom: 30px;
}

/* HEADER FIXE ET ÉLÉGANT */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--card-bg);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.app-header h1 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.cart-icon-btn {
    text-decoration: none;
    background: var(--bg-color);
    color: var(--text-color);
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.container {
    padding: 16px;
    max-width: 600px;
    margin: 0 auto;
}

/* CARTES PRODUITS MODERNE */
.product-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.product-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 14px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-image {
    width: 100%;
    height: 190px;
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-color);
}

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

.product-title {
    margin: 0 0 6px 0;
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.3;
}

.product-desc {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* BOUTONS D'ACTION */
.buy-btn {
    width: 100%;
    background: var(--primary-color);
    color: #fff;
    border: none;
    padding: 12px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 3px 8px rgba(42, 190, 232, 0.3);
    transition: background 0.2s, transform 0.1s;
}

.buy-btn:active {
    transform: scale(0.98);
}

/* PAGE PANIER */
.cart-section h2 {
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.cart-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 12px 16px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.cart-item-title {
    font-weight: 600;
    font-size: 0.9rem;
    max-width: 150px;
}

.cart-item-qty {
    display: flex;
    align-items: center;
    background: var(--bg-color);
    border-radius: 8px;
    padding: 2px;
    border: 1px solid var(--border-color);
}

.btn-qty {
    width: 30px;
    height: 30px;
    border: none;
    background: transparent;
    color: var(--text-color);
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
}

.qty-input {
    width: 32px;
    border: none;
    background: transparent;
    text-align: center;
    font-weight: 600;
    color: var(--text-color);
}

.btn-remove {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    opacity: 0.6;
}

/* FORMULAIRE DE LIVRAISON */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
}

.form-group input, 
.form-group select, 
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text-color);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
}

.link-back {
    display: inline-block;
    text-align: center;
    width: 100%;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    margin-top: 10px;
}