:root {
    --bg: #f4f6f8;
    --surface: #ffffff;
    --surface-soft: #f8fafc;
    --text: #121826;
    --muted: #677287;
    --line: #dbe2ea;
    --primary: #1f6feb;
    --primary-dark: #185abc;
    --success: #0f7a52;
    --danger: #c53b3b;
    --warning: #a15c00;
    --shadow: 0 18px 42px rgba(18, 24, 38, 0.09);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
    letter-spacing: 0;
}

button, input, select, textarea {
    font: inherit;
}

button { cursor: pointer; }

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: grid;
    grid-template-columns: auto minmax(220px, 1fr) auto;
    gap: 18px;
    align-items: center;
    padding: 14px clamp(16px, 4vw, 56px);
    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(10px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: 0;
    background: transparent;
    color: var(--text);
    font-weight: 900;
    font-size: 18px;
}

.brand-mark, .avatar {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--text);
    color: #fff;
    font-weight: 900;
}

.search {
    display: grid;
    grid-template-columns: 42px 1fr;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--surface-soft);
    padding: 0 14px;
    min-height: 44px;
}

.search span {
    color: var(--muted);
    font-size: 13px;
    font-weight: 800;
}

.search input {
    border: 0;
    background: transparent;
    outline: none;
}

.quick-nav {
    display: flex;
    gap: 8px;
}

.quick-nav button, .tabs button, .btn {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    color: var(--text);
    font-weight: 800;
    padding: 10px 14px;
}

main {
    width: min(1200px, 100%);
    margin: 0 auto;
    padding: 22px clamp(14px, 3vw, 28px) 56px;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 24px;
    align-items: stretch;
    padding: 28px;
    border-radius: 8px;
    background: linear-gradient(135deg, #14213d, #0f766e);
    color: #fff;
    box-shadow: var(--shadow);
}

.hero h1 {
    margin: 6px 0 10px;
    font-size: clamp(28px, 5vw, 46px);
    line-height: 1.12;
}

.hero p {
    max-width: 620px;
    color: rgba(255,255,255,0.82);
}

.eyebrow {
    margin: 0;
    color: rgba(255,255,255,0.7);
    font-size: 13px;
    font-weight: 900;
}

.login-panel {
    display: grid;
    gap: 12px;
    align-content: center;
    padding: 18px;
    border: 1px solid rgba(255,255,255,0.28);
    border-radius: 8px;
    background: rgba(255,255,255,0.12);
}

.login-fields {
    display: grid;
    gap: 8px;
}

input, select, textarea {
    width: 100%;
    min-height: 42px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 12px;
    background: #fff;
    color: var(--text);
    outline: none;
}

textarea {
    min-height: 96px;
    resize: vertical;
}

.login-actions, .modal-actions, .actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.btn.primary {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
}

.btn.primary:hover { background: var(--primary-dark); }
.btn.secondary:hover, .quick-nav button:hover, .tabs button:hover { background: var(--surface-soft); }
.btn.danger { border-color: var(--danger); background: var(--danger); color: #fff; }

.profile-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.profile-row span {
    display: block;
    color: rgba(255,255,255,0.78);
    font-size: 13px;
}

.tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    margin: 18px 0;
    padding-bottom: 4px;
}

.tabs button.active {
    border-color: var(--text);
    background: var(--text);
    color: #fff;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}

.summary-grid div, .panel, .product-card, .cart-line, .order-line, .plan {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
}

.summary-grid div {
    padding: 16px;
}

.summary-grid span, .label {
    display: block;
    color: var(--muted);
    font-size: 13px;
    font-weight: 800;
}

.summary-grid strong {
    display: block;
    margin-top: 8px;
    font-size: 20px;
}

.view-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 16px;
}

.panel {
    padding: 18px;
}

.panel h2, .panel h3 {
    margin: 0 0 14px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.product-card {
    display: grid;
    gap: 12px;
    padding: 14px;
}

.product-image {
    aspect-ratio: 4 / 3;
    border-radius: 8px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #eaf2ff, #e9f7ef);
    color: var(--primary);
    font-size: 38px;
    font-weight: 900;
}

.price {
    font-weight: 900;
    font-size: 19px;
}

.muted {
    color: var(--muted);
    font-size: 13px;
}

.cart-line, .order-line {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: center;
    padding: 14px;
    margin-bottom: 10px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.full { grid-column: 1 / -1; }

.badge {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 4px 10px;
    border-radius: 999px;
    background: #eef4ff;
    color: var(--primary);
    font-size: 12px;
    font-weight: 900;
}

.badge.ok { background: #e8f7ef; color: var(--success); }
.badge.warn { background: #fff5df; color: var(--warning); }
.badge.danger { background: #fff0f0; color: var(--danger); }

.empty {
    padding: 34px 18px;
    text-align: center;
    color: var(--muted);
    border: 1px dashed var(--line);
    border-radius: 8px;
    background: var(--surface-soft);
}

.toast-host {
    position: fixed;
    right: 18px;
    top: 78px;
    z-index: 40;
    display: grid;
    gap: 8px;
}

.toast {
    width: min(360px, calc(100vw - 32px));
    padding: 12px 14px;
    border-radius: 8px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    font-weight: 800;
}

.toast.error { border-color: #ffd2d2; color: var(--danger); }
.toast.ok { border-color: #ccebdc; color: var(--success); }

.modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: grid;
    place-items: center;
    padding: 18px;
    background: rgba(18, 24, 38, 0.44);
}

.modal {
    width: min(420px, 100%);
    padding: 22px;
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
}

.hidden { display: none !important; }

@media (max-width: 920px) {
    .topbar, .hero, .view-grid, .summary-grid {
        grid-template-columns: 1fr;
    }

    .quick-nav {
        overflow-x: auto;
    }

    .product-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 560px) {
    .topbar {
        gap: 10px;
        padding: 12px;
    }

    .product-grid, .form-grid {
        grid-template-columns: 1fr;
    }

    .hero {
        padding: 20px;
    }
}