:root {
    --color-bg: #FAF6F1;
    --color-surface: #FFFFFF;
    --color-text: #2D1B10;
    --color-text-secondary: #6B5B50;
    --color-accent: #8B5E3C;
    --color-accent-hover: #A07050;
    --color-border: #E8DDD3;
    --color-shadow: rgba(45, 27, 16, 0.08);
    --color-shadow-lg: rgba(45, 27, 16, 0.12);

    --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    --max-width: 1200px;
    --header-height: 64px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #1A1410;
        --color-surface: #2D2420;
        --color-text: #E8D5C4;
        --color-text-secondary: #B0A090;
        --color-accent: #C8956C;
        --color-accent-hover: #D4A87C;
        --color-border: #4A3C30;
        --color-shadow: rgba(0, 0, 0, 0.3);
        --color-shadow-lg: rgba(0, 0, 0, 0.5);
    }
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ── Header ────────────────────────────────────────── */

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-img {
    height: 44px;
    width: auto;
    object-fit: contain;
}

.header-nav {
    display: flex;
    gap: var(--space-md);
}

.header-nav a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    letter-spacing: 0.02em;
    transition: color var(--transition-fast);
}

.header-nav a:hover {
    color: var(--color-accent);
}

/* ── Language Selector ─────────────────────────────── */

.language-selector {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    position: relative;
}

.top-flags {
    display: flex;
    gap: 6px;
}

.flag-btn {
    width: 32px;
    height: 24px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color var(--transition-fast), transform var(--transition-fast), width var(--transition-fast), height var(--transition-fast), box-shadow var(--transition-fast);
    opacity: 0.7;
}

.flag-btn.active {
    opacity: 1;
    width: 38px;
    height: 28px;
    border: none;
    box-shadow: 0 1px 4px var(--color-shadow);
}

.flag-btn:hover,
.flag-btn:focus-visible {
    opacity: 1;
    transform: scale(1.05);
}

.flag-btn.active {
    border-color: var(--color-accent);
    opacity: 1;
}

.more-languages {
    position: relative;
    display: flex;
    align-items: center;
    gap: 4px;
}

.lang-current-flag {
    width: 38px;
    height: 28px;
    border-radius: var(--radius-sm);
    box-shadow: 0 1px 4px var(--color-shadow);
    display: none;
}

.lang-current-flag.visible {
    display: block;
}

.lang-dropdown-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.lang-dropdown-btn:hover,
.lang-dropdown-btn:focus-visible {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 16px var(--color-shadow-lg);
    list-style: none;
    min-width: 160px;
    padding: var(--space-xs) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all var(--transition-fast);
    z-index: 200;
}

.lang-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.lang-dropdown li:hover,
.lang-dropdown li:focus-visible {
    background: var(--color-bg);
    color: var(--color-accent);
}

.dropdown-flag {
    width: 20px;
    height: 14px;
    border-radius: 2px;
    flex-shrink: 0;
}

/* ── Main Content ──────────────────────────────────── */

.main-content {
    flex: 1;
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
}

/* ── Loading ───────────────────────────────────────── */

.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl) var(--space-lg);
    gap: var(--space-lg);
    color: var(--color-text-secondary);
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ── Product View ──────────────────────────────────── */

.product-view {
    animation: fadeIn var(--transition-slow) ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.product-layout {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.product-gallery {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.main-image-wrapper {
    width: 100%;
    max-width: 560px;
    margin: 0 auto;
    aspect-ratio: 4 / 3;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 12px var(--color-shadow);
}

.main-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.thumbnail-wrapper {
    width: 100%;
    max-width: 560px;
    margin: 0 auto;
}

.thumbnail-slider {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: var(--space-sm) 4px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--color-accent) var(--color-border);
}

.thumbnail-slider::-webkit-scrollbar {
    height: 6px;
}

.thumbnail-slider::-webkit-scrollbar-track {
    background: var(--color-border);
    border-radius: 3px;
}

.thumbnail-slider::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: 3px;
}

.thumbnail {
    width: 72px;
    height: 72px;
    object-fit: cover;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
    scroll-snap-align: start;
    flex-shrink: 0;
}

.thumbnail:hover {
    border-color: var(--color-accent-hover);
    transform: scale(1.05);
}

.thumbnail.active {
    border-color: var(--color-accent);
}

.product-info {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.product-badges {
    display: flex;
    gap: 6px;
    margin-bottom: 16px;
    flex-wrap: wrap;
    justify-content: flex-start;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 3px 8px;
    border-radius: 28px;
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge-origin { background: #E8F5E9; color: #2E7D32; }
.badge-process { background: #FFF3E0; color: #E65100; }
.badge-type { background: #E3F2FD; color: #1565C0; }

@media (prefers-color-scheme: dark) {
    .badge-origin { background: #1B3C20; color: #81C784; }
    .badge-process { background: #3C2810; color: #FFB74D; }
    .badge-type { background: #102840; color: #64B5F6; }
}

#product-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: 3px;
}

.product-subtitle {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.product-description {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    padding: 16px;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: 0 1px 3px var(--color-shadow);
    text-align: left;
}

.product-description h1,
.product-description h2,
.product-description h3 {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-text);
    margin: var(--space-lg) 0 var(--space-md);
}

.product-description h1 { font-size: 1.5rem; }
.product-description h2 { font-size: 1.25rem; }
.product-description h3 { font-size: 1.125rem; }

.product-description p {
    margin-bottom: var(--space-md);
}

.product-description ul,
.product-description ol {
    margin: var(--space-md) 0;
    padding-left: var(--space-xl);
}

.product-description li {
    margin-bottom: var(--space-xs);
}

.product-description strong {
    font-weight: 600;
    color: var(--color-text);
}

/* ── Specs Grid ────────────────────────────────────── */

.product-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 20px;
}

.spec-card {
    padding: 12px 14px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 1px 3px var(--color-shadow);
}

.spec-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-muted);
    margin-bottom: 3px;
    font-weight: 600;
}

.spec-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
}

/* ── Tasting Notes ──────────────────────────────────── */

.tasting-notes {
    margin-bottom: 20px;
    text-align: left;
}

.tasting-notes-title {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-secondary);
    margin-bottom: 10px;
}

.tasting-notes-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tasting-note {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 28px;
    font-size: 0.8rem;
    color: var(--color-text);
}

.tasting-note .note-icon {
    font-size: 0.95rem;
}

/* ── Brewing Guide ──────────────────────────────────── */

.brewing-guide {
    padding: 14px 16px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 1px 3px var(--color-shadow);
    margin-bottom: 20px;
    text-align: left;
}

.brewing-guide-title {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 10px;
    color: var(--color-text-secondary);
}

.brewing-steps {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.brewing-step {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--color-text);
}

.step-number {
    width: 20px;
    height: 20px;
    background: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    flex-shrink: 0;
    color: white;
}

/* ── Product Actions ────────────────────────────────── */

.product-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.btn-primary {
    background: var(--color-text);
    color: white;
}

.btn-primary:hover {
    background: var(--color-text-secondary);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--color-shadow);
}

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

.btn-secondary:hover {
    background: var(--color-bg);
    border-color: var(--color-accent);
}

@media (prefers-color-scheme: dark) {
    .btn-primary {
        background: var(--color-accent);
        color: #1A1410;
    }

    .btn-primary:hover {
        background: var(--color-accent-hover);
    }
}

.btn svg {
    width: 16px;
    height: 16px;
}

/* ── Error View ────────────────────────────────────── */

.error-view {
    text-align: center;
    padding: var(--space-3xl) var(--space-lg);
}

.error-message {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

/* ── Footer ────────────────────────────────────────── */

.site-footer {
    text-align: center;
    padding: var(--space-lg);
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    border-top: 1px solid var(--color-border);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent);
}

/* ── Mobile Language Picker ────────────────────────── */

.mobile-lang-picker {
    display: none;
    position: fixed;
    top: 5rem;
    right: 1rem;
    z-index: 200;
}

.mobile-lang-btn {
    position: relative;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.mobile-lang-btn:hover,
.mobile-lang-btn:focus-visible {
    border-color: var(--color-accent);
    box-shadow: 0 2px 12px var(--color-shadow-lg);
}

.mobile-lang-btn[aria-expanded="true"] {
    border-color: var(--color-accent);
    box-shadow: 0 4px 16px var(--color-shadow-lg);
}

.mobile-lang-flag {
    width: 32px;
    height: 24px;
    border-radius: 2px;
}

.mobile-lang-chevron {
    font-size: 0.6rem;
    color: var(--color-text-secondary);
    transition: transform var(--transition-fast);
}

.mobile-lang-btn[aria-expanded="true"] .mobile-lang-chevron {
    transform: rotate(180deg);
}

.mobile-lang-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: fit-content;
    min-width: 240px;
    max-width: calc(100vw - 2rem);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px var(--color-shadow-lg);
    list-style: none;
    padding: var(--space-xs);
    max-height: 60vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
}

.mobile-lang-dropdown.open {
    display: grid;
}

.mobile-lang-dropdown li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--color-text);
    transition: background var(--transition-fast);
    border-radius: var(--radius-sm);
}

.mobile-lang-dropdown li:hover,
.mobile-lang-dropdown li:focus-visible {
    background: var(--color-bg);
}

.mobile-lang-dropdown li.active {
    background: var(--color-bg);
    font-weight: 600;
}

.mobile-lang-dropdown .mobile-lang-item-flag {
    width: 20px;
    height: 14px;
    border-radius: 2px;
    flex-shrink: 0;
}

.mobile-lang-dropdown .mobile-lang-item-name {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mobile-lang-dropdown .mobile-lang-item-check {
    color: var(--color-accent);
    font-size: 0.8rem;
    opacity: 0;
    flex-shrink: 0;
}

.mobile-lang-dropdown li.active .mobile-lang-item-check {
    opacity: 1;
}

@media (max-width: 360px) {
    .mobile-lang-dropdown {
        grid-template-columns: 1fr;
    }
}

/* ── Responsive ────────────────────────────────────── */

@media (min-width: 768px) {
    .site-header {
        padding: var(--space-md) var(--space-2xl);
    }

    .main-content {
        padding: var(--space-3xl) var(--space-2xl);
    }

    .product-layout {
        flex-direction: row;
        align-items: flex-start;
        gap: var(--space-3xl);
    }

    .product-gallery {
        flex: 1;
        min-width: 0;
    }

    .main-image-wrapper {
        max-width: 100%;
        aspect-ratio: 3 / 2;
    }

    .thumbnail-slider {
        gap: 10px;
    }

    .thumbnail {
        width: 88px;
        height: 88px;
    }

    .product-info {
        flex: 1;
        text-align: left;
        padding-top: var(--space-md);
    }

    #product-title {
        font-size: 2.25rem;
    }
}

@media (min-width: 1024px) {
    .main-image-wrapper {
        aspect-ratio: 4 / 3;
    }

    .thumbnail {
        width: 100px;
        height: 100px;
    }
}

@media (max-width: 768px) {
    .product-specs {
        grid-template-columns: 1fr;
    }

    .product-actions {
        flex-direction: column;
    }

    .btn {
        justify-content: center;
    }

    /* Mobile: hide header flags, show fixed picker */
    .top-flags,
    .more-languages {
        display: none;
    }

    .mobile-lang-picker {
        display: block;
    }

    /* Mobile: show nav icons only */
    .header-nav a span {
        display: none;
    }

    .main-content {
        padding-top: calc(var(--header-height) + var(--space-lg));
    }
}

@media (max-width: 480px) {
    .header-nav {
        display: none;
    }

    #product-title {
        font-size: 1.5rem;
    }

    .product-description {
        padding: 12px;
        font-size: 0.85rem;
    }
}

/* ── Accessibility ──────────────────────────────────── */

:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}