/* === Custom Properties === */
:root {
    --bg-primary: #f5f0e8;
    --bg-warm: #e8a855;
    --bg-dark: #2a2235;
    --text-primary: #2d2926;
    --text-secondary: #6b6560;
    --accent-warm: #d4785a;
    --accent-glow: #ff9248;
    --accent-cool: #8a7fa8;
    --divider: #d9d2c7;
    --current-bg: #f5f0e8;
    --current-text: #2d2926;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--current-bg);
    color: var(--current-text);
    font-family: 'Source Serif 4', Georgia, serif;
    line-height: 1.85;
    transition: background-color 1.2s ease;
    overflow-x: hidden;
}

/* === Scroll Progress === */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0%;
    background-color: var(--accent-warm);
    z-index: 1000;
    transition: width 0.1s linear;
}

/* === Typography === */
.hero-text {
    font-family: 'Playfair Display', serif;
    font-weight: 900;
    font-size: clamp(5rem, 14vw, 18rem);
    letter-spacing: -0.03em;
    line-height: 0.85;
    color: var(--text-primary);
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

.hour-title {
    font-family: 'Playfair Display', serif;
    font-weight: 900;
    font-size: clamp(2.5rem, 6vw, 5rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-primary);
    margin-bottom: 1.75rem;
}

.hour-title-light {
    color: #f5f0e8;
}

.hour-title-night {
    color: var(--accent-cool);
}

.timestamp {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: clamp(0.7rem, 1vw, 0.85rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 1rem;
}

.timestamp-light {
    color: rgba(245, 240, 232, 0.7);
}

.timestamp-night {
    color: var(--accent-cool);
}

.body-text {
    font-family: 'Source Serif 4', Georgia, serif;
    font-weight: 400;
    font-size: clamp(1rem, 1.8vw, 1.25rem);
    line-height: 1.85;
    letter-spacing: 0.01em;
    color: var(--text-primary);
    max-width: 45ch;
}

.body-text em {
    font-style: italic;
}

.body-text-light {
    color: #f5f0e8;
}

.body-text-night {
    color: rgba(245, 240, 232, 0.6);
    max-width: 35ch;
}

.date-stamp {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: clamp(0.7rem, 1vw, 0.85rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.seal-domain {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: clamp(0.7rem, 1vw, 0.85rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-top: 1.75rem;
    display: block;
}

/* === Spreads (General) === */
.spread {
    min-height: 100vh;
    padding: 8vw;
    position: relative;
    display: flex;
    align-items: center;
}

/* === Opening Spread === */
.spread-opening {
    background-color: var(--bg-primary);
    display: flex;
    gap: 0;
}

.opening-left {
    flex: 0 0 62%;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 84vh;
    overflow: hidden;
}

.opening-right {
    flex: 0 0 38%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    position: relative;
    height: 84vh;
}

.vertical-rule {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: var(--divider);
}

.kumiko-panel.asanoha-small {
    width: 120px;
    height: 120px;
    background:
        repeating-linear-gradient(0deg, transparent, transparent 19px, var(--divider) 19px, var(--divider) 20px),
        repeating-linear-gradient(60deg, transparent, transparent 19px, var(--divider) 19px, var(--divider) 20px),
        repeating-linear-gradient(120deg, transparent, transparent 19px, var(--divider) 19px, var(--divider) 20px);
    opacity: 0.3;
}

.chevron-breath {
    position: absolute;
    bottom: 4vh;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-secondary);
    animation: breathe 4s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 0.8; }
}

/* === Dawn === */
.spread-dawn {
    background: linear-gradient(180deg, #d4785a 0%, var(--bg-primary) 100%);
    justify-content: center;
}

.hour-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.haiku-block {
    margin-top: 1rem;
}

/* === Morning === */
.spread-morning {
    background-color: var(--bg-primary);
    display: flex;
    gap: 0;
    position: relative;
}

.spread-morning::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(0deg, transparent, transparent 29px, var(--divider) 29px, var(--divider) 30px),
        repeating-linear-gradient(60deg, transparent, transparent 29px, var(--divider) 29px, var(--divider) 30px),
        repeating-linear-gradient(120deg, transparent, transparent 29px, var(--divider) 29px, var(--divider) 30px);
    opacity: 0.08;
    pointer-events: none;
}

.morning-left {
    flex: 0 0 30%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.geometric-bar.asanoha-bar {
    width: 4px;
    height: 60vh;
    background: repeating-linear-gradient(
        0deg,
        var(--accent-warm) 0px,
        var(--accent-warm) 8px,
        transparent 8px,
        transparent 16px
    );
    opacity: 0.5;
}

.morning-right {
    flex: 0 0 70%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* === Noon === */
.spread-noon {
    background-color: var(--bg-primary);
    justify-content: center;
}

.noon-content {
    width: 40%;
    margin: 0 auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* === Afternoon === */
.spread-afternoon {
    background-color: var(--bg-primary);
    display: flex;
    gap: 0;
    position: relative;
}

.spread-afternoon::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(0deg, transparent, transparent 29px, var(--divider) 29px, var(--divider) 30px),
        repeating-linear-gradient(60deg, transparent, transparent 29px, var(--divider) 29px, var(--divider) 30px),
        repeating-linear-gradient(120deg, transparent, transparent 29px, var(--divider) 29px, var(--divider) 30px),
        repeating-linear-gradient(45deg, transparent, transparent 29px, var(--divider) 29px, var(--divider) 30px);
    opacity: 0.06;
    pointer-events: none;
}

.afternoon-left {
    flex: 0 0 70%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.afternoon-right {
    flex: 0 0 30%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.geometric-motif.izutsu-pattern {
    width: 100px;
    height: 100px;
    border: 2px solid var(--accent-warm);
    transform: rotate(45deg);
    position: relative;
    opacity: 0.4;
    animation: slowSpin 60s linear infinite;
}

.geometric-motif.izutsu-pattern::before {
    content: '';
    position: absolute;
    inset: 12px;
    border: 1px solid var(--accent-warm);
}

.geometric-motif.izutsu-pattern::after {
    content: '';
    position: absolute;
    inset: 24px;
    border: 1px solid var(--accent-warm);
}

@keyframes slowSpin {
    from { transform: rotate(45deg); }
    to { transform: rotate(405deg); }
}

/* === Golden Hour === */
.spread-golden {
    background-color: var(--bg-warm);
    justify-content: center;
}

.golden-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.glow-text {
    text-shadow: 0 0 20px rgba(255, 146, 72, 0.4), 0 0 40px rgba(255, 146, 72, 0.2), 0 0 80px rgba(255, 146, 72, 0.1);
    animation: glowPulse 6s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* === Dusk === */
.spread-dusk {
    background-color: var(--bg-primary);
    display: flex;
    gap: 0;
}

.dusk-left,
.dusk-right {
    flex: 0 0 25%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dusk-center {
    flex: 0 0 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.kumiko-panel.izutsu-faint {
    width: 80%;
    height: 40vh;
    background:
        repeating-linear-gradient(45deg, transparent, transparent 29px, var(--divider) 29px, var(--divider) 30px),
        repeating-linear-gradient(-45deg, transparent, transparent 29px, var(--divider) 29px, var(--divider) 30px);
    opacity: 0.1;
}

/* === Night === */
.spread-night {
    background-color: var(--bg-dark);
    justify-content: center;
    min-height: 100vh;
}

.night-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

/* === Closing Seal === */
.spread-seal {
    background-color: var(--bg-dark);
    min-height: 50vh;
    justify-content: center;
    position: relative;
}

.spread-seal::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(217, 210, 199, 0.05) 39px, rgba(217, 210, 199, 0.05) 40px),
        repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(217, 210, 199, 0.05) 39px, rgba(217, 210, 199, 0.05) 40px);
    pointer-events: none;
}

.seal-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0 auto;
}

.hanko {
    width: 80px;
    height: 80px;
    border: 2px solid var(--accent-warm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.hanko-kanji {
    font-size: 2rem;
    color: var(--accent-warm);
    font-weight: 900;
}

.glow-element {
    box-shadow: 0 0 30px rgba(255, 146, 72, 0.3), 0 0 60px rgba(255, 146, 72, 0.15), inset 0 0 20px rgba(255, 146, 72, 0.1);
    animation: glowPulse 6s ease-in-out infinite;
}

/* === Section Dividers === */
.section-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 0;
    background-color: var(--bg-primary);
}

.section-divider-dark {
    background-color: var(--bg-dark);
}

.divider-mark {
    display: block;
    width: 24px;
    height: 24px;
    position: relative;
}

.divider-star {
    background: var(--accent-warm);
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

.divider-diamond {
    background: var(--accent-warm);
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

.divider-hexagon {
    background: var(--accent-warm);
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
}

.divider-circle {
    background: var(--accent-warm);
    border-radius: 50%;
}

.divider-square {
    background: var(--accent-warm);
    transform: rotate(45deg);
    width: 18px;
    height: 18px;
}

.divider-triangle {
    background: var(--accent-warm);
    clip-path: polygon(50% 0%, 100% 100%, 0% 100%);
}

/* === Fade Reveal === */
.fade-reveal {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 800ms cubic-bezier(0.25, 0.1, 0.25, 1.0), transform 800ms cubic-bezier(0.25, 0.1, 0.25, 1.0);
}

.fade-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* === Responsive === */
@media (max-width: 768px) {
    .spread {
        padding: 6vw;
    }

    .spread-opening {
        flex-direction: column;
    }

    .opening-left,
    .opening-right {
        flex: none;
        width: 100%;
        height: auto;
    }

    .opening-left {
        min-height: 60vh;
    }

    .opening-right {
        min-height: 30vh;
    }

    .vertical-rule {
        display: none;
    }

    .spread-morning {
        flex-direction: column;
    }

    .morning-left,
    .morning-right {
        flex: none;
        width: 100%;
    }

    .morning-left {
        display: none;
    }

    .spread-afternoon {
        flex-direction: column;
    }

    .afternoon-left,
    .afternoon-right {
        flex: none;
        width: 100%;
    }

    .afternoon-right {
        margin-top: 3rem;
    }

    .noon-content {
        width: 80%;
    }

    .spread-dusk {
        flex-direction: column;
    }

    .dusk-left,
    .dusk-right {
        display: none;
    }

    .dusk-center {
        flex: none;
        width: 100%;
    }
}