/* taisho.day - Anti-design Taisho-era cultural collision */

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

:root {
    --ethereal-ice: #e8eef6;
    --deep-indigo: #1a1e2e;
    --taisho-azure: #4a7fb5;
    --pale-wisteria: #b8c4e0;
    --electric-ink: #2340a0;
    --blush-anomaly: #d4566a;
    --paper-white: #f4f6fa;
    --faded-fog: #9aa8c4;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--ethereal-ice);
    color: var(--deep-indigo);
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 16px;
    line-height: 1.65;
    overflow-x: hidden;
}

/* ---- Dawn: Title Eruption ---- */
.dawn-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    background: var(--ethereal-ice);
}

.title-eruption {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.title-taisho {
    font-family: 'Anton', sans-serif;
    font-size: clamp(8rem, 30vw, 20rem);
    text-transform: uppercase;
    color: var(--deep-indigo);
    line-height: 0.85;
    transform: rotate(-8deg) translateX(100%);
    margin-left: auto;
    margin-right: -5%;
    animation: slamRight 0.4s ease-out forwards;
    display: block;
}

.title-day {
    font-family: 'Anton', sans-serif;
    font-size: clamp(8rem, 30vw, 20rem);
    text-transform: uppercase;
    color: var(--taisho-azure);
    line-height: 0.85;
    transform: rotate(-8deg) translateX(-100%);
    margin-right: auto;
    margin-left: -5%;
    animation: slamLeft 0.4s ease-out forwards 0.15s;
    display: block;
    opacity: 0;
}

@keyframes slamRight {
    to { transform: rotate(-8deg) translateX(-5%); }
}

@keyframes slamLeft {
    to { transform: rotate(-8deg) translateX(5%); opacity: 1; }
}

.era-date {
    display: block;
    text-align: center;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--faded-fog);
    margin-top: 40px;
    opacity: 0;
    animation: fadeIn 0.5s ease forwards 1s;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* ---- Collision Zones ---- */
.collision-zone {
    position: relative;
    padding: 40px 20px;
}

.collision-panel {
    position: relative;
    padding: 48px 52px;
    margin-bottom: -40px;
    overflow: hidden;
}

.panel-1 {
    background: var(--pale-wisteria);
    width: 80vw;
    margin-left: auto;
    box-shadow: -8px 0 0 var(--deep-indigo);
}

.panel-2 {
    background: var(--ethereal-ice);
    width: 75vw;
    margin-right: auto;
    z-index: 1;
    box-shadow: 8px 0 0 var(--deep-indigo);
}

.panel-3 {
    background: var(--paper-white);
    width: 85vw;
    margin-left: auto;
    margin-right: 5vw;
    box-shadow: -8px 0 0 var(--deep-indigo);
}

.panel-4 {
    background: var(--pale-wisteria);
    width: 80vw;
    margin-right: auto;
    box-shadow: 8px 0 0 var(--deep-indigo);
}

.panel-5 {
    background: var(--ethereal-ice);
    width: 70vw;
    margin-left: auto;
    z-index: 1;
    box-shadow: -8px 0 0 var(--deep-indigo);
}

.panel-6 {
    background: var(--paper-white);
    width: 90vw;
    margin: 0 auto;
    box-shadow: -8px 0 0 var(--deep-indigo);
}

.panel-border-top {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--deep-indigo);
}

.panel-border-left {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 3px;
    background: var(--deep-indigo);
}

.panel-border-right {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 3px;
    background: var(--deep-indigo);
}

.panel-label {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--faded-fog);
    margin-bottom: 12px;
}

.collision-panel h2 {
    font-family: 'Anton', sans-serif;
    font-size: clamp(1.5rem, 4vw, 3rem);
    text-transform: uppercase;
    color: var(--deep-indigo);
    margin-bottom: 14px;
    line-height: 1.1;
}

.collision-panel p {
    max-width: 600px;
    margin-bottom: 12px;
}

/* ---- Red Seals ---- */
.red-seal {
    position: relative;
    z-index: 10;
}

.seal-1 {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--blush-anomaly);
    margin: -30px auto -30px 65vw;
    transform: scale(0);
    transition: transform 0.3s ease;
}

.seal-1.visible {
    transform: scale(1);
}

.seal-2 {
    width: 80px;
    height: 40px;
    background: var(--blush-anomaly);
    margin: -20px auto -20px 30vw;
    transform: scale(0);
    transition: transform 0.3s ease;
}

.seal-2.visible {
    transform: scale(1);
}

/* ---- Zoom Focus ---- */
.zoom-focus {
    transform: scale(0.85);
    opacity: 0.7;
    transition: transform 0.6s ease-out, opacity 0.6s ease-out;
}

.zoom-focus.in-view {
    transform: scale(1);
    opacity: 1;
}

/* ---- Negative Space ---- */
.negative-space {
    height: 300px;
    background: var(--paper-white);
}

.negative-space.short {
    height: 150px;
}

/* ---- Diagonal Zone ---- */
.diagonal-zone {
    position: relative;
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--ethereal-ice);
}

.diagonal-text {
    font-family: 'Anton', sans-serif;
    font-size: clamp(3rem, 8vw, 6rem);
    text-transform: uppercase;
    color: var(--electric-ink);
    transform: rotate(-45deg);
    transform-origin: center;
    white-space: nowrap;
    letter-spacing: 0.05em;
}

.diagonal-text-alt {
    color: var(--taisho-azure);
    transform: rotate(45deg);
}

.diagonal-2 {
    height: 60vh;
}

/* ---- Chrysanthemum Background ---- */
.chrysanthemum-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    opacity: 0.15;
    pointer-events: none;
}

.chrys-path {
    stroke-dasharray: 300;
    stroke-dashoffset: 300;
    transition: stroke-dashoffset 2s ease;
}

.chrysanthemum-bg.visible .chrys-path {
    stroke-dashoffset: 0;
}

/* ---- Generative Texture ---- */
.gen-texture {
    position: absolute;
    inset: 0;
    opacity: 0.04;
    pointer-events: none;
    background-image:
        radial-gradient(circle at 20% 30%, var(--faded-fog) 1px, transparent 1px),
        radial-gradient(circle at 60% 70%, var(--faded-fog) 1px, transparent 1px),
        radial-gradient(circle at 80% 20%, var(--faded-fog) 1px, transparent 1px),
        radial-gradient(circle at 40% 80%, var(--faded-fog) 1px, transparent 1px);
    background-size: 60px 60px, 45px 45px, 55px 55px, 50px 50px;
}

/* ---- Dusk Section ---- */
.dusk-section {
    background: var(--deep-indigo);
    color: var(--ethereal-ice);
    padding: 80px 20px 0;
    min-height: 80vh;
    position: relative;
    overflow: hidden;
}

.dusk-section .collision-panel {
    background: rgba(74, 127, 181, 0.1);
    box-shadow: none;
}

.dusk-section .collision-panel h2 {
    color: var(--ethereal-ice);
}

.dusk-section .collision-panel p {
    color: var(--pale-wisteria);
}

.dusk-label {
    color: var(--faded-fog);
}

.panel-dusk-1 {
    width: 80vw;
    margin-left: auto;
    border-top: 3px solid var(--taisho-azure);
}

.panel-dusk-2 {
    width: 70vw;
    margin-right: auto;
    border-left: 3px solid var(--taisho-azure);
    margin-bottom: 0;
    padding-bottom: 100px;
}

.final-seal {
    position: absolute;
    bottom: 40px;
    right: 60px;
    width: 200px;
    height: 40px;
    background: var(--blush-anomaly);
}

/* ---- Afternoon zone ---- */
.afternoon {
    padding-top: 80px;
    padding-bottom: 80px;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .title-taisho, .title-day {
        font-size: clamp(4rem, 20vw, 8rem);
    }

    .collision-panel {
        padding: 32px 24px;
        width: 95vw !important;
        margin-left: auto !important;
        margin-right: auto !important;
    }

    .diagonal-text {
        font-size: clamp(2rem, 6vw, 4rem);
    }

    .seal-1 { margin-left: auto; margin-right: auto; }
    .seal-2 { margin-left: auto; margin-right: auto; }
}