:root {
    color-scheme: light;
    --bg: #f8fbff;
    --surface: #ffffff;
    --surface-strong: #eef5ff;
    --text: #102a43;
    --muted: #5f7385;
    --primary: #2563eb;
    --primary-soft: #dbeafe;
    --border: #d4e1f5;
    --shadow: 0 20px 50px rgba(16, 42, 67, 0.08);
}

body.dark {
    color-scheme: dark;
    --bg: #0b1220;
    --surface: #111827;
    --surface-strong: #1f2937;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --primary: #60a5fa;
    --primary-soft: #1e3a8a;
    --border: #334155;
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    min-height: 100%;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 25%), var(--bg);
    color: var(--text);
}

body {
    transition: background 0.3s ease, color 0.3s ease;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select {
    font: inherit;
}

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

body.dark .site-header {
    background: rgba(15, 23, 42, 0.8);
}

.brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.brand i {
    font-size: 2rem;
    color: var(--primary);
}

.brand h1 {
    margin: 0;
    font-size: 1.4rem;
}

.brand p {
    margin: 0.25rem 0 0;
    color: var(--muted);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.1rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    transition: background 0.25s ease, border-color 0.25s ease;
}

.theme-toggle:hover {
    border-color: var(--primary);
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.hero {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 2rem;
    align-items: center;
    padding: 2.5rem 0;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.hero h2 {
    margin: 0 0 1rem;
    font-size: clamp(2.1rem, 2.6vw, 3.4rem);
    line-height: 1.05;
}

.hero p {
    margin: 0 0 1.8rem;
    max-width: 44rem;
    color: var(--muted);
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.95rem 1.5rem;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button.primary {
    background: var(--primary);
    color: #ffffff;
}

.button.secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.button.tertiary {
    background: var(--primary-soft);
    color: var(--text);
    border: 1px solid transparent;
}

.hero-visual {
    display: grid;
    gap: 1rem;
}

.feature-box {
    display: grid;
    gap: 1rem;
    padding: 1.5rem;
    border-radius: 24px;
    background: var(--surface);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

body.dark .feature-box {
    border-color: rgba(148, 163, 184, 0.15);
}

.feature-box i {
    font-size: 2rem;
    color: var(--primary);
}

.feature-box h3 {
    margin: 0;
}

.feature-box p {
    margin: 0;
    color: var(--muted);
}

.products-section {
    padding-top: 2rem;
}

.products-header {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.category-filters {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.filter-button {
    padding: 0.75rem 1rem;
    border-radius: 999px;
    border: 1px solid transparent;
    background: rgba(255, 255, 255, 0.6);
    color: var(--text);
    transition: background 0.2s ease, border-color 0.2s ease;
}

body.dark .filter-button {
    background: rgba(255, 255, 255, 0.08);
}

.filter-button.active,
.filter-button:hover {
    border-color: var(--primary);
    background: var(--primary-soft);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.product-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1.5rem;
    padding: 1.75rem;
    border-radius: 28px;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

body.dark .product-card {
    border-color: rgba(148, 163, 184, 0.12);
}

.product-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.product-icon {
    font-size: 2.2rem;
    color: var(--primary);
}

.product-category {
    display: inline-flex;
    padding: 0.45rem 0.8rem;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--text);
    font-size: 0.85rem;
    font-weight: 700;
}

.product-card h3 {
    margin: 0;
}

.product-description {
    margin: 0;
    color: var(--muted);
    line-height: 1.7;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.product-features span {
    padding: 0.55rem 0.85rem;
    border-radius: 999px;
    background: rgba(37, 99, 235, 0.08);
    color: var(--text);
    font-size: 0.85rem;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.product-footer strong {
    color: var(--text);
    font-size: 1.1rem;
}

.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 2rem;
    border-radius: 24px;
    background: var(--surface);
    border: 1px dashed var(--border);
    color: var(--muted);
}

.empty-state i {
    font-size: 2rem;
}

.admin-form {
    display: grid;
    gap: 1rem;
    background: var(--surface);
    padding: 1.75rem;
    border-radius: 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

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

.admin-form label {
    display: grid;
    gap: 0.65rem;
    color: var(--text);
    font-weight: 600;
}

input[type="text"],
input[type="email"],
input[type="password"],
textarea,
select {
    width: 100%;
    padding: 0.95rem 1rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: var(--surface-strong);
    color: var(--text);
    transition: border-color 0.2s ease, background 0.2s ease;
}

textarea {
    resize: vertical;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
}

.admin-panel {
    margin-top: 1.5rem;
}

.table-wrapper {
    overflow-x: auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 1rem;
    box-shadow: var(--shadow);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
    color: var(--text);
}

.data-table tbody tr:hover {
    background: rgba(37, 99, 235, 0.05);
}

.button.danger {
    background: #f87171;
    color: #ffffff;
}

.site-header-actions {
    display: inline-flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}

@media (max-width: 900px) {
    .hero {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .site-header,
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .theme-toggle {
        width: 100%;
        justify-content: center;
    }
}