:root {
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.25);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    --deep-blue: #0f172a;
    --accent: #ea580c;
    --accent-hover: #c2410c;
    --bg: #f1f5f9;
    --white: #ffffff;
    --text: #0f172a;
    --text-secondary: #475569;
    --border: #e2e8f0;
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.app {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px 120px;
}

/* Стеклянная шапка */
.header {
    position: sticky;
    top: 12px;
    z-index: 100;
    margin-top: 12px;
    background: var(--glass-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--glass-shadow);
    margin-bottom: 28px;
}

.header-content {
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 56px;
    gap: 20px;
}

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

.logo-svg {
    width: 22px;
    height: 22px;
    color: var(--accent);
    flex-shrink: 0;
}

.logo-text h1 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--deep-blue);
    letter-spacing: -0.3px;
}

.logo-text p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 1px;
}

.tabs {
    display: flex;
    gap: 6px;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 8px;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    font-size: 0.85rem;
}

    .tab-btn:hover {
        background: rgba(255, 255, 255, 0.5);
        border-color: var(--border);
    }

    .tab-btn.active {
        background: var(--white);
        border-color: var(--border);
        color: var(--deep-blue);
        box-shadow: 0 2px 6px rgba(0,0,0,0.04);
    }

.tab-content {
    display: none;
}

    .tab-content.active {
        display: block;
    }

/* Поиск */
.search-section {
    margin-bottom: 24px;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 5px 5px 5px 16px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.03);
    transition: var(--transition);
    max-width: 560px;
}

    .search-box:focus-within {
        border-color: var(--accent);
        box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

.search-icon {
    color: var(--text-secondary);
    flex-shrink: 0;
}

.search-box input {
    flex: 1;
    border: none;
    padding: 10px 0;
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    background: transparent;
}

/* Кнопки */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius-sm);
    padding: 10px 18px;
    font-size: 0.9rem;
}

    .btn-primary:hover {
        background: var(--accent-hover);
        box-shadow: 0 4px 10px rgba(234,88,12,0.25);
    }

.btn-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    padding: 0;
    flex-shrink: 0;
}

.btn-block {
    width: 100%;
    padding: 12px;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--deep-blue);
    color: var(--deep-blue);
    border-radius: var(--radius-sm);
    padding: 8px;
    width: 100%;
    justify-content: center;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

    .btn-outline:hover {
        background: var(--deep-blue);
        color: #fff;
    }

.btn-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
}

    .btn-close:hover {
        background: rgba(0,0,0,0.04);
        color: var(--text);
    }

/* Карточки */
.parts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 14px;
}

.part-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.03);
    transition: var(--transition);
}

    .part-card:hover {
        box-shadow: 0 6px 18px rgba(0,0,0,0.06);
        transform: translateY(-2px);
    }

    .part-card .oem {
        font-size: 0.7rem;
        font-weight: 700;
        color: var(--accent);
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: 8px;
    }

    .part-card .name {
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: 12px;
    }

    .part-card .meta {
        display: flex;
        gap: 14px;
        margin-bottom: 12px;
        font-size: 0.85rem;
        color: var(--text-secondary);
    }

    .part-card .price {
        font-size: 1.4rem;
        font-weight: 700;
        color: var(--deep-blue);
        margin-bottom: 14px;
    }

/* Чат */
.chat-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--glass-shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 520px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.chat-msg {
    max-width: 80%;
    animation: fadeUp 0.25s ease;
}

    .chat-msg.user {
        align-self: flex-end;
    }

    .chat-msg.assistant {
        align-self: flex-start;
    }

.msg-content {
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 0.9rem;
    line-height: 1.5;
}

.chat-msg.user .msg-content {
    background: var(--deep-blue);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.chat-msg.assistant .msg-content {
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(4px);
    border: 1px solid var(--glass-border);
    border-bottom-left-radius: 4px;
}

.msg-content ul {
    margin-top: 8px;
    padding-left: 20px;
}

.msg-content li {
    margin-bottom: 4px;
}

.chat-input-area {
    padding: 14px;
    border-top: 1px solid var(--glass-border);
    display: flex;
    gap: 10px;
    background: rgba(255,255,255,0.35);
    backdrop-filter: blur(8px);
}

    .chat-input-area input {
        flex: 1;
        padding: 10px 16px;
        border: 1px solid var(--border);
        border-radius: 24px;
        outline: none;
        font-family: inherit;
        font-size: 0.9rem;
        background: var(--white);
    }

        .chat-input-area input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(234,88,12,0.1);
        }

/* Корзина */
.cart-panel {
    position: fixed;
    right: 20px;
    bottom: 90px;
    width: 340px;
    background: var(--glass-bg);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--glass-shadow);
    z-index: 200;
    display: none;
    flex-direction: column;
    max-height: 65vh;
}

.cart-header {
    padding: 14px 18px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

    .cart-header h3 {
        font-weight: 600;
        font-size: 1rem;
        display: flex;
        align-items: center;
        gap: 6px;
    }

.cart-items {
    list-style: none;
    overflow-y: auto;
    padding: 10px 18px;
    margin: 0;
    flex: 1;
}

    .cart-items li {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 8px 0;
        border-bottom: 1px solid rgba(0,0,0,0.04);
        font-size: 0.85rem;
    }

        .cart-items li:last-child {
            border-bottom: none;
        }

.cart-footer {
    padding: 14px 18px;
    border-top: 1px solid var(--glass-border);
    background: rgba(255,255,255,0.45);
}

.cart-total {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.cart-float-btn {
    position: fixed;
    right: 20px;
    bottom: 28px;
    background: var(--deep-blue);
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(15,23,42,0.25);
    transition: var(--transition);
    z-index: 150;
    display: flex;
    align-items: center;
    gap: 6px;
}

    .cart-float-btn:hover {
        background: #1e293b;
        transform: scale(1.03);
        box-shadow: 0 10px 24px rgba(15,23,42,0.35);
    }

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

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

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        height: auto;
        padding: 12px 0;
    }

    .tabs {
        width: 100%;
    }

    .tab-btn {
        flex: 1;
        justify-content: center;
    }

    .cart-panel {
        width: calc(100% - 28px);
        left: 14px;
        right: 14px;
        bottom: 80px;
    }
}