/* ============================================
   AI Diary - Journal Style
   ============================================ */

:root {
    --bg: #faf8f4;
    --bg-entry: #ffffff;
    --text: #2c2c2c;
    --text-light: #6b6b6b;
    --accent: #8b4513;
    --accent-light: #c4956a;
    --border: #e0d8cc;
    --shadow: rgba(139, 69, 19, 0.08);
    --font-serif: 'Noto Serif SC', 'Crimson Pro', 'Georgia', serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-serif);
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.8;
    font-size: 17px;
    min-height: 100vh;
}

/* Paper texture overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23000000' fill-opacity='1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    z-index: 1000;
}

/* ---- Wrapper ---- */
.diary-wrapper {
    max-width: 780px;
    margin-left: max(90px, calc(50% - 390px + 45px));
    margin-right: auto;
    padding: 40px 20px 60px;
}

/* ---- Header ---- */
.diary-header {
    text-align: center;
    padding: 60px 0 40px;
    border-bottom: 2px solid var(--border);
    margin-bottom: 40px;
}

.header-ornament {
    color: var(--accent-light);
    font-size: 18px;
    letter-spacing: 8px;
    margin: 12px 0;
}

.diary-header h1 {
    font-family: 'Crimson Pro', var(--font-serif);
    font-size: 3.2em;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 6px;
    text-transform: uppercase;
    margin: 8px 0;
}

.diary-header .subtitle {
    font-family: 'Crimson Pro', var(--font-serif);
    font-style: italic;
    color: var(--text-light);
    font-size: 1.1em;
    margin-top: 8px;
}

.diary-header .author {
    color: var(--accent);
    font-size: 0.95em;
    margin-top: 16px;
    letter-spacing: 3px;
}

/* ---- Year Navigation Sidebar (fixed left) ---- */
.year-nav {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    width: 90px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--bg);
    border-right: 1px solid var(--border);
    z-index: 200;
}

.nav-label {
    font-family: 'Crimson Pro', var(--font-serif);
    font-size: 0.75em;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent-light);
    margin-bottom: 8px;
}

.year-btn {
    font-family: 'Crimson Pro', var(--font-serif);
    font-size: 1.05em;
    padding: 6px 16px;
    border: 1.5px solid var(--border);
    background: transparent;
    color: var(--text-light);
    cursor: pointer;
    border-radius: 2px;
    transition: all 0.3s ease;
    letter-spacing: 2px;
    text-decoration: none;
    display: block;
    text-align: center;
}

.year-btn:hover {
    border-color: var(--accent-light);
    color: var(--accent);
}

.year-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}


/* ---- Year Divider ---- */
.year-divider {
    text-align: center;
    margin: 40px 0 50px;
    position: relative;
}

.year-divider::before,
.year-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 35%;
    height: 1px;
    background: var(--border);
}

.year-divider::before { left: 0; }
.year-divider::after { right: 0; }

.year-divider span {
    font-family: 'Crimson Pro', var(--font-serif);
    font-size: 2em;
    font-weight: 600;
    color: var(--accent);
    background: var(--bg);
    padding: 0 24px;
    letter-spacing: 4px;
}

/* ---- Diary Entry ---- */
.diary-entry {
    display: flex;
    gap: 28px;
    margin-bottom: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--border);
    animation: fadeIn 0.6s ease;
}

.diary-entry:last-child {
    border-bottom: none;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---- Date Column ---- */
.entry-date {
    flex-shrink: 0;
    width: 64px;
    text-align: center;
    padding-top: 4px;
}

.date-day {
    display: block;
    font-family: 'Crimson Pro', var(--font-serif);
    font-size: 2.4em;
    font-weight: 600;
    color: var(--accent);
    line-height: 1;
}

.date-month {
    display: block;
    font-family: 'Crimson Pro', var(--font-serif);
    font-size: 0.85em;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-top: 4px;
}

/* ---- Entry Content ---- */
.entry-content {
    flex: 1;
    min-width: 0;
}

.entry-content h2 {
    font-size: 1.5em;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 16px;
    line-height: 1.4;
}

.entry-content p {
    margin-bottom: 14px;
    text-align: justify;
}

.entry-content strong {
    color: var(--accent);
    font-weight: 600;
}

.entry-content ul, .entry-content ol {
    margin: 12px 0 16px 20px;
}

.entry-content li {
    margin-bottom: 8px;
}

.entry-content blockquote {
    border-left: 3px solid var(--accent-light);
    padding: 12px 20px;
    margin: 16px 0;
    background: rgba(139, 69, 19, 0.03);
    font-style: italic;
    color: var(--text-light);
}

.entry-content img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 16px 0;
    box-shadow: 0 4px 16px var(--shadow);
    border: 1px solid var(--border);
}

.entry-content code {
    font-family: var(--font-mono);
    background: #f5f0e8;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.88em;
}

.entry-content pre {
    background: #2d2d2d;
    color: #e0e0e0;
    padding: 20px;
    border-radius: 4px;
    overflow-x: auto;
    margin: 16px 0;
    font-family: var(--font-mono);
    font-size: 0.85em;
    line-height: 1.6;
}

.entry-content pre code {
    background: none;
    padding: 0;
    color: inherit;
}

/* ---- Image Gallery ---- */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    margin: 20px 0;
}

.image-gallery img {
    width: 100%;
    height: auto;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.image-gallery img:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 24px var(--shadow);
}

/* ---- Footer ---- */
.diary-footer {
    text-align: center;
    padding: 50px 0 30px;
    border-top: 2px solid var(--border);
    margin-top: 40px;
}

.footer-ornament {
    color: var(--accent-light);
    font-size: 18px;
    letter-spacing: 8px;
    margin-bottom: 16px;
}

.diary-footer p {
    color: var(--text-light);
    font-size: 0.9em;
}

.footer-quote {
    font-style: italic;
    margin-top: 20px !important;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.footer-attribution {
    color: var(--accent-light) !important;
    margin-top: 4px !important;
    font-size: 0.85em !important;
}

/* ---- Lightbox ---- */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    cursor: zoom-out;
    animation: fadeIn 0.3s ease;
}

.lightbox-overlay img {
    max-width: 90%;
    max-height: 90vh;
    border-radius: 4px;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .year-nav {
        position: sticky;
        top: 0;
        left: 0;
        height: auto;
        width: 100%;
        flex-direction: row;
        justify-content: center;
        padding: 12px 0;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .diary-wrapper {
        margin-left: auto;
        margin-right: auto;
    }

    .nav-label {
        display: none;
    }
}

@media (max-width: 640px) {
    .diary-wrapper {
        padding: 20px 16px 40px;
    }

    .diary-header h1 {
        font-size: 2.2em;
        letter-spacing: 3px;
    }

    .diary-entry {
        flex-direction: column;
        gap: 12px;
    }

    .entry-date {
        width: auto;
        display: flex;
        align-items: baseline;
        gap: 8px;
    }

    .date-day {
        font-size: 1.6em;
    }

    .image-gallery {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .year-divider span {
        font-size: 1.5em;
    }
}