/* ==========================================================================
   daitoua.com - Wartime Broadsheet Archive
   Color Palette:
     Aged Newsprint:   #F2E8D5
     Deep Sumi Ink:    #1A1410
     Vermillion Seal:  #B8352A
     Tarnished Gold:   #8B7340
     Foxed Edge:       #C4A86B
     Ash White:        #FAFAF5
     Charcoal Desk:    #2A2320
     Faded Blue Stamp: #4A6B8A
     Darkened Paper:   #D9C8A0
   ========================================================================== */

/* --- CSS Custom Properties --- */
:root {
    --paper-age: 0;
    --newsprint: #F2E8D5;
    --sumi-ink: #1A1410;
    --vermillion: #B8352A;
    --tarnished-gold: #8B7340;
    --foxed-edge: #C4A86B;
    --ash-white: #FAFAF5;
    --charcoal-desk: #2A2320;
    --faded-blue: #4A6B8A;
    --darkened-paper: #D9C8A0;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Libre Baskerville', serif;
    font-size: 1rem;
    line-height: 1.75;
    color: var(--sumi-ink);
    background-color: var(--newsprint);
    overflow-x: hidden;
}

/* --- Newsprint Texture Overlay --- */
.newsprint-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0.1;
    background:
        repeating-conic-gradient(#8B7340 0% 25%, transparent 0% 50%) 0 0 / 3px 3px,
        repeating-conic-gradient(#C4A86B 0% 25%, transparent 0% 50%) 1px 1px / 4px 4px;
    mix-blend-mode: multiply;
}

/* --- Folio Navigation Bar --- */
.folio-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--newsprint);
    opacity: 0;
    transform: translateY(-100%);
    transition: opacity 0.6s ease, transform 0.6s ease;
    padding: 0 2rem;
    border-bottom: 1px solid var(--foxed-edge);
}

.folio-bar.visible {
    opacity: 1;
    transform: translateY(0);
}

.folio-rule {
    height: 1px;
    background: var(--sumi-ink);
    opacity: 0.3;
}

.folio-sections {
    display: flex;
    gap: 1.5rem;
    padding: 0.5rem 0;
    overflow-x: auto;
    scrollbar-width: none;
}

.folio-sections::-webkit-scrollbar {
    display: none;
}

.folio-link {
    font-family: 'Playfair Display', serif;
    font-size: 0.7rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--sumi-ink);
    opacity: 0.5;
    cursor: pointer;
    white-space: nowrap;
    transition: opacity 0.3s ease;
}

.folio-link:hover,
.folio-link.active {
    opacity: 1;
}

.folio-link.active {
    color: var(--vermillion);
}

/* --- Masthead --- */
.masthead {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--newsprint);
    overflow: hidden;
}

.masthead-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 2rem;
    max-width: 1000px;
}

.masthead-flanks {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2rem;
}

.masthead-title {
    font-family: 'Zen Antique', serif;
    font-size: clamp(3rem, 8vw, 10rem);
    font-weight: 400;
    color: var(--sumi-ink);
    writing-mode: vertical-rl;
    letter-spacing: 0.1em;
    line-height: 1;
    height: clamp(10rem, 30vw, 30rem);
}

.masthead-date-left,
.masthead-date-right {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.date-imperial {
    font-family: 'Zen Antique', serif;
    font-size: 1.2rem;
    color: var(--tarnished-gold);
    writing-mode: vertical-rl;
}

.date-gregorian {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    color: var(--faded-blue);
    letter-spacing: 0.2em;
}

.date-label {
    font-family: 'Playfair Display', serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--sumi-ink);
    letter-spacing: 0.1em;
}

.date-edition {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.65rem;
    color: var(--tarnished-gold);
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.masthead-rule {
    width: 80%;
    height: 3px;
    background: var(--sumi-ink);
    margin: 0 auto 2rem;
    position: relative;
}

.masthead-rule::before,
.masthead-rule::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--sumi-ink);
}

.masthead-rule::before { top: -5px; }
.masthead-rule::after { bottom: -5px; }

.masthead-headline {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.5rem, 3vw, 3rem);
    font-weight: 700;
    color: var(--sumi-ink);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.masthead-subtitle {
    font-family: 'Libre Baskerville', serif;
    font-size: clamp(0.85rem, 1.2vw, 1.1rem);
    color: var(--tarnished-gold);
    font-style: italic;
    max-width: 600px;
    margin: 0 auto 3rem;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: fadeInUp 2s ease 1s both;
}

.scroll-text {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: var(--faded-blue);
    text-transform: uppercase;
    letter-spacing: 0.3em;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--faded-blue);
    border-bottom: 2px solid var(--faded-blue);
    transform: rotate(45deg);
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); }
    50% { transform: rotate(45deg) translateY(8px); }
}

/* --- Era Sections --- */
.era-section {
    position: relative;
    padding: 4rem 2rem;
    min-height: 100vh;
    transition: background-color 1.5s ease, color 1.5s ease;
}

.era-section[data-paper-age="0"] {
    background-color: #F2E8D5;
    color: var(--sumi-ink);
}

.era-section[data-paper-age="0.15"] {
    background-color: #EEE2CC;
    color: var(--sumi-ink);
}

.era-section[data-paper-age="0.3"] {
    background-color: #E6DAC0;
    color: var(--sumi-ink);
}

.era-section[data-paper-age="0.5"] {
    background-color: #D9C8A0;
    color: var(--sumi-ink);
}

.era-section[data-paper-age="0.7"] {
    background-color: #C4B088;
    color: var(--sumi-ink);
}

.era-collapse-section {
    background-color: var(--sumi-ink) !important;
    color: var(--newsprint) !important;
}

.era-collapse-section .article-headline,
.era-collapse-section .era-title,
.era-collapse-section .era-dates,
.era-collapse-section .article-body,
.era-collapse-section .sidebar-annotation p,
.era-collapse-section .annotation-label {
    color: var(--newsprint);
}

.era-collapse-section .column-rule {
    background-color: var(--newsprint);
    opacity: 0.3;
}

.era-collapse-section .newsprint-overlay {
    opacity: 0.05;
}

.era-collapse-section .folded-corner::before {
    background: linear-gradient(135deg, var(--charcoal-desk) 50%, transparent 50%);
}

/* --- Era Header --- */
.era-header {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--foxed-edge);
}

.era-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 700;
    color: var(--sumi-ink);
}

.era-dates {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    color: var(--tarnished-gold);
    letter-spacing: 0.15em;
}

/* --- Hanko Stamps --- */
.hanko-stamp {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    opacity: 0;
    transform: scale(0.5) rotate(-15deg);
    transition: opacity 0.8s cubic-bezier(0.34, 1.56, 0.64, 1),
                transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    filter: url(#ink-bleed);
}

.hanko-stamp.visible {
    opacity: 1;
    transform: scale(1) rotate(var(--hanko-rotate, -3deg));
}

.hanko-svg {
    width: 100%;
    height: 100%;
}

/* --- Broadsheet Scroll Panels --- */
.broadsheet-scroll {
    position: relative;
    z-index: 2;
    display: flex;
    gap: 2rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: thin;
    scrollbar-color: var(--foxed-edge) transparent;
    padding-bottom: 1rem;
}

.broadsheet-scroll::-webkit-scrollbar {
    height: 6px;
}

.broadsheet-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.broadsheet-scroll::-webkit-scrollbar-thumb {
    background: var(--foxed-edge);
    border-radius: 3px;
}

.broadsheet-page {
    position: relative;
    flex: 0 0 90vw;
    scroll-snap-align: start;
    background: inherit;
    padding: 2.5rem;
    border: 1px solid var(--foxed-edge);
    box-shadow: 2px 2px 8px rgba(26, 20, 16, 0.1);
}

/* --- Folded Corner Effect --- */
.folded-corner {
    position: absolute;
    top: 0;
    right: 0;
    width: 40px;
    height: 40px;
    overflow: hidden;
    z-index: 3;
}

.folded-corner::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--foxed-edge) 50%, transparent 50%);
    transform: rotate(0deg);
    transform-origin: top right;
}

/* --- Column Grid (6-column broadsheet) --- */
.column-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1.5rem;
    align-items: start;
}

.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }
.col-span-4 { grid-column: span 4; }
.col-span-6 { grid-column: span 6; }

/* --- Column Rules --- */
.column-rule {
    width: 3px;
    background: var(--sumi-ink);
    opacity: 0.2;
    min-height: 100%;
    filter: url(#wobble-rule);
    grid-row: 1 / -1;
}

/* --- Article Typography --- */
.article-headline {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.2rem, 2vw, 1.8rem);
    font-weight: 700;
    color: var(--sumi-ink);
    margin-bottom: 1rem;
    line-height: 1.25;
}

.article-body {
    font-family: 'Libre Baskerville', serif;
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--sumi-ink);
    text-align: justify;
    hyphens: auto;
    margin-bottom: 1rem;
}

/* --- Sidebar Annotations --- */
.sidebar-annotation {
    padding: 1rem;
    border-left: 2px solid var(--faded-blue);
    margin-bottom: 1.5rem;
}

.annotation-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: var(--faded-blue);
    display: block;
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
}

.sidebar-annotation p {
    font-family: 'Libre Baskerville', serif;
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--sumi-ink);
    opacity: 0.85;
}

/* --- Censor Bars --- */
.censor-bar {
    position: relative;
    margin: 1.5rem 0;
    cursor: pointer;
}

.censored-text {
    font-family: 'Libre Baskerville', serif;
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--sumi-ink);
    display: block;
    padding: 0.75rem;
}

.censor-overlay {
    position: absolute;
    inset: 0;
    background: var(--vermillion);
    opacity: 0.85;
    transition: opacity 0.6s ease-out, box-shadow 0.6s ease-out;
    z-index: 2;
}

.censor-bar:hover .censor-overlay {
    opacity: 0.15;
    box-shadow: 0 0 20px rgba(184, 53, 42, 0.2);
}

.censor-bar.revealed .censor-overlay {
    opacity: 0.15;
    box-shadow: 0 0 20px rgba(184, 53, 42, 0.2);
}

/* --- Telegram Ticker --- */
.telegram-ticker {
    position: relative;
    z-index: 2;
    height: 28px;
    background: var(--charcoal-desk);
    overflow: hidden;
    margin-bottom: 1rem;
}

.ticker-content {
    display: flex;
    gap: 4rem;
    white-space: nowrap;
    animation: tickerScroll 60s linear infinite;
    padding-top: 4px;
}

.ticker-content span {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: var(--ash-white);
    letter-spacing: 0.05em;
    flex-shrink: 0;
}

@keyframes tickerScroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* --- Broadsheet Navigation Arrows --- */
.broadsheet-nav {
    position: absolute;
    bottom: 1rem;
    right: 2rem;
    display: flex;
    gap: 0.5rem;
    z-index: 5;
}

.broadsheet-arrow {
    width: 32px;
    height: 32px;
    border: 1px solid var(--foxed-edge);
    background: transparent;
    color: var(--tarnished-gold);
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease, color 0.3s ease;
}

.broadsheet-arrow:hover {
    background: var(--tarnished-gold);
    color: var(--newsprint);
}

.era-collapse-section .broadsheet-arrow {
    border-color: var(--foxed-edge);
    color: var(--foxed-edge);
}

.era-collapse-section .broadsheet-arrow:hover {
    background: var(--foxed-edge);
    color: var(--sumi-ink);
}

/* --- Document Drawer --- */
.document-drawer {
    position: relative;
    min-height: 100vh;
    background: var(--charcoal-desk);
    padding: 4rem 2rem;
    overflow: hidden;
}

.drawer-surface {
    max-width: 1200px;
    margin: 0 auto;
    perspective: 800px;
}

.drawer-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--foxed-edge);
    text-align: center;
    margin-bottom: 3rem;
    letter-spacing: 0.1em;
}

.documents-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding: 2rem;
}

.document-card {
    position: relative;
    background: var(--newsprint);
    padding: 2rem;
    border: 1px solid var(--foxed-edge);
    transform: rotate(var(--doc-rotate, 0deg));
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.5s ease,
                z-index 0s;
    cursor: pointer;
    box-shadow: 2px 3px 10px rgba(0,0,0,0.3);
}

.document-card:hover {
    transform: rotate(0deg) translateY(-10px) translateZ(40px);
    box-shadow: 5px 8px 25px rgba(0,0,0,0.5);
    z-index: 10;
}

.document-label {
    font-family: 'Playfair Display', serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--sumi-ink);
    display: block;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--foxed-edge);
}

.document-excerpt {
    font-family: 'Libre Baskerville', serif;
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--sumi-ink);
    margin-bottom: 1rem;
    font-style: italic;
}

.document-ref {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.65rem;
    color: var(--faded-blue);
    letter-spacing: 0.15em;
}

/* --- Afterword --- */
.afterword {
    position: relative;
    min-height: 100vh;
    background: var(--ash-white);
    padding: 6rem 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.afterword-content {
    max-width: 900px;
    width: 100%;
}

.afterword-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2rem, 3vw, 3rem);
    font-weight: 700;
    color: var(--sumi-ink);
    text-align: center;
    margin-bottom: 3rem;
    letter-spacing: 0.05em;
}

.afterword-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.afterword-heading {
    font-family: 'Playfair Display', serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--sumi-ink);
    margin-bottom: 1rem;
}

.afterword-body {
    font-family: 'Libre Baskerville', serif;
    font-size: 0.95rem;
    line-height: 1.8;
    color: #333;
    margin-bottom: 1rem;
}

.afterword-closing {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    text-align: center;
    color: var(--tarnished-gold);
    letter-spacing: 0.2em;
    padding-top: 2rem;
    border-top: 1px solid #ddd;
}

/* --- Cartographic Map Fragments --- */
.map-fragment {
    position: fixed;
    pointer-events: none;
    z-index: 0;
    opacity: 0.15;
}

.map-meiji {
    width: 300px;
    height: 250px;
    top: 20%;
    right: 5%;
}

.map-path {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    animation: drawPath 4s ease forwards;
}

@keyframes drawPath {
    to { stroke-dashoffset: 0; }
}

/* --- Mobile Responsive --- */
@media (max-width: 768px) {
    .column-grid {
        grid-template-columns: 1fr 1fr;
    }

    .col-span-2,
    .col-span-3,
    .col-span-4,
    .col-span-6 {
        grid-column: span 2;
    }

    .column-rule {
        display: none;
    }

    .broadsheet-page {
        flex: 0 0 95vw;
        padding: 1.5rem;
    }

    .masthead-flanks {
        flex-direction: column;
        gap: 1.5rem;
    }

    .masthead-title {
        writing-mode: horizontal-tb;
        height: auto;
    }

    .date-imperial {
        writing-mode: horizontal-tb;
    }

    .era-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .documents-container {
        grid-template-columns: 1fr;
    }

    .afterword-columns {
        grid-template-columns: 1fr;
    }

    .folio-sections {
        gap: 1rem;
    }

    .folio-link {
        font-size: 0.6rem;
    }

    .map-fragment {
        display: none;
    }
}

@media (max-width: 480px) {
    .column-grid {
        grid-template-columns: 1fr;
    }

    .col-span-2,
    .col-span-3,
    .col-span-4,
    .col-span-6 {
        grid-column: span 1;
    }

    .broadsheet-page {
        padding: 1rem;
    }
}