:root {
    --color-bg: #faf9f7;
    --color-bg-card: #ffffff;
    --color-bg-warm: #f5f3ef;
    --color-border: #e8e5e0;
    --color-border-light: #f0ede8;
    --color-text: #1a1a1a;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-accent: #c9a227;
    --color-accent-dark: #b8922a;
    --color-accent-light: rgba(201, 162, 39, 0.1);
    --font-serif: 'Instrument Serif', Georgia, serif;
    --font-sans: 'DM Sans', 'Noto Sans JP', -apple-system, sans-serif;
}

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

/* Accessibility */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Navigation */
nav {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border-light);
    padding: 1.25rem 2rem;
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-img {
    height: 80px;
    width: auto;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 20px;
    color: var(--color-accent);
    font-style: italic;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--color-text);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--color-text);
    color: white;
    padding: 10px 20px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    opacity: 0.9;
    transition: opacity 0.2s ease;
}

.nav-cta:hover {
    opacity: 1;
}

.nav-cta svg {
    width: 16px;
    height: 16px;
}

/* Nav Right */
.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Language Switcher */
.lang-switcher {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-sans);
}

.lang-btn:hover {
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 8px 0;
    min-width: 140px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    z-index: 200;
}

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

.lang-dropdown a {
    display: block;
    padding: 10px 16px;
    font-size: 14px;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all 0.15s;
}

.lang-dropdown a:hover {
    background: var(--color-bg-warm);
    color: var(--color-text);
}

.lang-dropdown a.active {
    color: var(--color-accent);
    font-weight: 500;
}

/* Disclaimer Banner */
.disclaimer-banner {
    background: var(--color-bg-warm);
    border-bottom: 1px solid var(--color-border-light);
    padding: 10px 40px;
    text-align: center;
}

.disclaimer-banner p {
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.5;
    max-width: 800px;
    margin: 0 auto;
}

/* Main Content */
main {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 40px 100px;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 48px;
}

.breadcrumb a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

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

.breadcrumb-separator {
    color: var(--color-text-muted);
}

/* Word Header */
.word-header {
    margin-bottom: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--color-border);
}

.word-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-cefr {
    background: var(--color-accent-light);
    color: var(--color-accent-dark);
}

.badge-type {
    background: var(--color-bg-warm);
    color: var(--color-text-secondary);
}

.badge-article {
    background: var(--color-bg-warm);
    color: var(--color-text-secondary);
    font-family: var(--font-serif);
    font-style: italic;
    text-transform: none;
    font-size: 14px;
}

.word-title {
    font-family: var(--font-serif);
    font-size: 56px;
    font-weight: 400;
    line-height: 1.1;
    margin-bottom: 8px;
    color: var(--color-text);
}

.word-display-form {
    font-size: 18px;
    color: var(--color-text-secondary);
    font-family: var(--font-serif);
    font-style: italic;
}

/* Section Label */
.section-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

/* Translation Section */
.translation-section {
    margin-bottom: 48px;
}

.translation-text {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 400;
    color: var(--color-text);
    line-height: 1.4;
}

/* Grammar Section */
.grammar-section {
    margin-bottom: 48px;
}

.grammar-card {
    background: var(--color-bg-warm);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 12px;
}

.grammar-card:last-child {
    margin-bottom: 0;
}

.grammar-pattern {
    font-size: 16px;
    color: var(--color-text);
    margin-bottom: 8px;
    line-height: 1.5;
}

.grammar-marker {
    display: inline-block;
    background: var(--color-accent-light);
    color: var(--color-accent-dark);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 600;
    margin-right: 6px;
}

.grammar-example {
    font-size: 15px;
    color: var(--color-text-secondary);
    font-style: italic;
    padding-left: 16px;
    border-left: 2px solid var(--color-border);
}

/* Examples Section */
.examples-section {
    margin-bottom: 48px;
}

.example-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 28px;
    margin-bottom: 16px;
    position: relative;
    transition: all 0.2s ease;
}

.example-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.example-number {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 28px;
    height: 28px;
    background: var(--color-bg-warm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-muted);
}

.example-german {
    font-size: 20px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 10px;
    padding-right: 48px;
    line-height: 1.5;
}

.example-japanese {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Memory Hint Section */
.hint-section {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    margin-bottom: 48px;
}

.hint-section.hint-blurred {
    min-height: 280px;
}

.hint-header {
    padding: 24px 28px;
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    gap: 14px;
}

.hint-icon {
    width: 40px;
    height: 40px;
    background: var(--color-accent-light);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hint-icon svg {
    width: 22px;
    height: 22px;
    fill: var(--color-accent);
}

.hint-title {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 400;
}

.hint-content-blurred {
    padding: 28px;
}

.hint-block-preview {
    margin-bottom: 16px;
}

.hint-block-preview .hint-block-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-accent-dark);
    margin-bottom: 8px;
}

.hint-block-preview p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.hint-placeholder {
    filter: blur(6px);
    user-select: none;
    pointer-events: none;
}

.hint-placeholder p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 2.2;
}

.hint-overlay {
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(to bottom, rgba(255,255,255,0) 0%, rgba(255,255,255,0.9) 30%, rgba(255,255,255,0.95) 100%);
}

.hint-cta {
    text-align: center;
    padding: 20px;
}

.hint-cta-text {
    font-size: 15px;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.hint-cta-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--color-text);
    color: white;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.hint-cta-button:hover {
    background: #333;
    transform: translateY(-1px);
}

.hint-cta-button svg {
    width: 18px;
    height: 18px;
}

/* Related/Similar Words Section */
.related-section,
.similar-section {
    margin-bottom: 48px;
}

.related-words,
.similar-words {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.related-word-item,
.similar-word-item {
    display: inline-block;
    padding: 8px 16px;
    background: var(--color-bg-warm);
    color: var(--color-text-secondary);
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.2s;
}

/* Etymology Section */
.etymology-section {
    margin-bottom: 48px;
}

.etymology-card {
    background: var(--color-bg-warm);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 12px;
}

.etymology-card:last-child {
    margin-bottom: 0;
}

.etymology-text {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* Memory Tips Section */
.memory-tips-section {
    margin-bottom: 48px;
}

.memory-tip-card {
    background: var(--color-bg-warm);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 12px;
    position: relative;
}

.memory-tip-card::before {
    content: "💡";
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 20px;
    opacity: 0.6;
}

.memory-tip-card:last-child {
    margin-bottom: 0;
}

.memory-tip-card p {
    font-size: 16px;
    color: var(--color-text);
    line-height: 1.8;
    padding-right: 32px;
}

/* App Link Section */
.app-link-section {
    margin-top: 48px;
    padding: 32px;
    background: var(--color-accent-light);
    border-left: 4px solid var(--color-accent);
    border-radius: 0 12px 12px 0;
    text-align: center;
}

.app-locked-section .app-link-section {
    margin-top: 0;
}

.app-link-text {
    font-size: 15px;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.app-link-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--color-accent);
    color: white;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.app-link-button:hover {
    background: var(--color-accent-dark);
    transform: translateY(-1px);
}

.app-link-button svg {
    width: 18px;
    height: 18px;
}

/* App Locked Section (blurred content) */
.app-locked-section {
    position: relative;
}

.app-locked-blur {
    filter: blur(5px);
    -webkit-filter: blur(5px);
    user-select: none;
    -webkit-user-select: none;
    pointer-events: none;
    margin-bottom: 16px;
}

/* Audio Section */
.audio-section {
    margin-bottom: 48px;
}

.audio-section .app-link-section {
    margin-top: 0;
}

/* Footer */
footer {
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
    padding: 40px 0 24px;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-brand {
    font-family: var(--font-serif);
    font-size: 18px;
    font-style: italic;
    color: var(--color-accent);
}

.footer-links {
    display: flex;
    list-style: none;
    gap: 24px;
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

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

.footer-disclaimer {
    max-width: 1200px;
    margin: 24px auto 0;
    padding: 0 40px;
    font-size: 11px;
    color: var(--color-text-muted);
    text-align: center;
    line-height: 1.5;
}

.footer-copyright {
    width: 100%;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 13px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border-light);
}

/* Error Page */
.error-page {
    text-align: center;
    padding: 80px 24px;
}

.error-title {
    font-family: var(--font-serif);
    font-size: 48px;
    font-weight: 400;
    color: var(--color-text);
    margin-bottom: 16px;
}

.error-message {
    color: var(--color-text-secondary);
    font-size: 18px;
    margin-bottom: 32px;
}

.btn-primary {
    display: inline-block;
    padding: 14px 28px;
    background: var(--color-text);
    color: white;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background: #333;
}

/* Responsive */
@media (max-width: 768px) {
    nav {
        padding: 1rem;
    }

    .nav-links {
        display: none;
    }

    main {
        padding: 40px 20px 80px;
    }

    .breadcrumb {
        margin-bottom: 32px;
    }

    .word-title {
        font-size: 40px;
    }

    .word-display-form {
        font-size: 16px;
    }

    .translation-text {
        font-size: 26px;
    }

    .example-card {
        padding: 20px;
    }

    .example-german {
        font-size: 17px;
    }

    .hint-header {
        padding: 20px;
    }

    .hint-content-blurred {
        padding: 20px;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
        padding: 0 20px;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .disclaimer-banner {
        padding: 10px 20px;
    }

    .footer-disclaimer {
        padding: 0 20px;
    }

    .search-page-title {
        font-size: 44px;
    }

    .search-result-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .search-result-badges {
        margin-left: 0;
    }

    .search-result-main {
        flex-direction: column;
        gap: 4px;
    }

}

/* Search Page (Top) */
.search-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    text-align: center;
    padding: 0 20px;
}

.search-page-title {
    font-family: var(--font-serif);
    font-size: clamp(4rem, 10vw, 7rem);
    font-weight: 400;
    color: #A68520;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.search-page-subtitle {
    font-size: 16px;
    color: var(--color-text-muted);
    margin-bottom: 40px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* Search Box */
.search-form-large {
    width: 100%;
    max-width: 580px;
}

.search-form-header {
    margin-bottom: 32px;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 30px;
    padding: 4px 4px 4px 20px;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.search-box:focus-within {
    border-color: var(--color-accent);
    box-shadow: 0 4px 16px rgba(201, 162, 39, 0.12);
}

.search-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
    margin-right: 12px;
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 16px;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: transparent;
    min-width: 0;
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-box-large {
    padding: 6px 6px 6px 24px;
}

.search-box-large .search-input {
    font-size: 18px;
    padding: 12px 0;
}

.search-box-large .search-icon {
    width: 22px;
    height: 22px;
}

.search-box-small .search-input {
    padding: 8px 0;
}

.search-button {
    flex-shrink: 0;
    padding: 10px 24px;
    background: var(--color-text);
    color: white;
    border: none;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: background 0.2s;
}

.search-button:hover {
    background: #333;
}

.search-box-large .search-button {
    padding: 12px 28px;
    font-size: 15px;
}

/* Search Results */
.search-message {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-secondary);
    font-size: 16px;
}

.search-results-count {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.search-results {
    margin-top: 8px;
}

.search-result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    margin-bottom: 10px;
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

.search-result-item:hover {
    border-color: var(--color-accent);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.search-result-main {
    display: flex;
    align-items: baseline;
    gap: 12px;
    min-width: 0;
    flex: 1;
}

.search-result-word {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 400;
    color: var(--color-text);
    flex-shrink: 0;
}

.search-result-translation {
    font-size: 15px;
    color: var(--color-text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.search-result-badges {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
    margin-left: 12px;
}

.badge-sm {
    padding: 3px 8px;
    font-size: 11px;
}

/* Fade-in animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.word-header {
    animation: fadeIn 0.5s ease-out;
}

.translation-section {
    animation: fadeIn 0.5s ease-out 0.1s backwards;
}

.examples-section {
    animation: fadeIn 0.5s ease-out 0.2s backwards;
}

.hint-section {
    animation: fadeIn 0.5s ease-out 0.3s backwards;
}