/* ============================================================
   ronpa.day - Philosophical Debate Chamber CSS
   ============================================================ */

/* CSS Variables - Exact DESIGN.md Palette */
:root {
    --color-primary-bg: #1C1018;
    --color-secondary-bg: #2A1A22;
    --color-primary-accent: #8B2252;
    --color-secondary-accent: #D4A574;
    --color-text-primary: #E8DDD3;
    --color-text-muted: #7A6B63;
    --color-border: #4A2838;

    --font-display: 'Poiret One', serif;
    --font-body: 'Libre Baskerville', serif;
    --font-ui: 'DM Mono', monospace;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-primary-bg);
    color: var(--color-text-primary);
    line-height: 1.85;
    overflow-x: hidden;
}

/* Floating Kanji Atmosphere Layer */
.floating-kanji-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.floating-kanji {
    position: absolute;
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 5rem);
    color: var(--color-text-primary);
    opacity: 0.08;
    animation: float-up 25s linear infinite;
    user-select: none;
    left: var(--x);
    top: 100vh;
}

.floating-kanji:nth-child(1) { animation-delay: 0s; }
.floating-kanji:nth-child(2) { animation-delay: 2s; }
.floating-kanji:nth-child(3) { animation-delay: 4s; }
.floating-kanji:nth-child(4) { animation-delay: 6s; }
.floating-kanji:nth-child(5) { animation-delay: 8s; }
.floating-kanji:nth-child(6) { animation-delay: 10s; }
.floating-kanji:nth-child(7) { animation-delay: 12s; }
.floating-kanji:nth-child(8) { animation-delay: 14s; }

@keyframes float-up {
    0% {
        transform: translateY(0);
        opacity: 0.08;
    }
    100% {
        transform: translateY(-100vh);
        opacity: 0.12;
    }
}

/* Stages - Full Viewport Sections */
.stage {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    z-index: 2;
}

/* Stage 0 - The Provocation */
.stage-0 {
    background-color: var(--color-primary-bg);
}

.stage-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.domain-name {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 7rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-primary);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.1em;
}

.domain-name .letter {
    animation: letter-reveal 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    transform: translateY(20px);
}

.domain-name .letter:nth-child(1) { animation-delay: 0.06s; }
.domain-name .letter:nth-child(2) { animation-delay: 0.12s; }
.domain-name .letter:nth-child(3) { animation-delay: 0.18s; }
.domain-name .letter:nth-child(4) { animation-delay: 0.24s; }
.domain-name .letter:nth-child(5) { animation-delay: 0.30s; }
.domain-name .letter:nth-child(6) { animation-delay: 0.36s; }
.domain-name .letter:nth-child(7) { animation-delay: 0.42s; }
.domain-name .letter:nth-child(8) { animation-delay: 0.48s; }
.domain-name .letter:nth-child(9) { animation-delay: 0.54s; }

@keyframes letter-reveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.kanji-container {
    position: relative;
    height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.kanji-display {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 4rem);
    color: var(--color-primary-accent);
    animation: kanji-fade-in 0.8s ease-out 1.5s forwards;
    opacity: 0;
}

@keyframes kanji-fade-in {
    to {
        opacity: 1;
    }
}

.lottie-animation {
    width: 120px;
    height: 40px;
}

.scroll-hint {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-secondary-accent);
    animation: scroll-hint-pulse 2s ease-in-out infinite, scroll-hint-fade 3s ease-out forwards;
}

@keyframes scroll-hint-pulse {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

@keyframes scroll-hint-fade {
    0% { opacity: 1; }
    100% { opacity: 0; }
}

/* Stage 1 & 2 - Thesis and Antithesis with Grid Layout */
.stage-1 {
    background-color: var(--color-primary-bg);
}

.stage-2 {
    background-color: var(--color-primary-bg);
}

.stage-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 2rem;
    max-width: 1400px;
    width: 100%;
}

.thesis-column,
.antithesis-column {
    position: relative;
    max-width: 480px;
}

.thesis-column {
    grid-column: 1;
}

.antithesis-column {
    grid-column: 3;
}

.empty-space {
    /* Deliberate negative space */
}

.thesis-column.ghosted {
    opacity: 0.3;
}

.vertical-rule {
    position: absolute;
    right: -1.5rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-primary-accent);
}

.antithesis-column .vertical-rule {
    right: auto;
    left: -1.5rem;
}

.column-content {
    padding: 2rem;
}

.stage-heading {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-secondary-accent);
    margin-bottom: 1.5rem;
    animation: heading-slide-in 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}

@keyframes heading-slide-in {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.column-content p {
    font-size: clamp(1rem, 1.2vw, 1.15rem);
    line-height: 1.85;
    color: var(--color-text-primary);
    margin-bottom: 1.5rem;
    animation: text-fade-in 0.8s ease-out 0.2s forwards;
    opacity: 0;
}

@keyframes text-fade-in {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Stage 3 - Synthesis */
.stage-3 {
    background-color: var(--color-primary-bg);
}

.synthesis-wrapper {
    max-width: 600px;
    width: 100%;
}

.synthesis-column {
    padding: 2rem;
    text-align: center;
}

.synthesis-column .column-content {
    padding: 0;
}

.synthesis-column .stage-heading {
    font-size: clamp(2.5rem, 6vw, 4rem);
    animation: synthesis-heading-in 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}

@keyframes synthesis-heading-in {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.synthesis-column p {
    animation: synthesis-text-in 0.8s ease-out 0.3s forwards;
    opacity: 0;
}

@keyframes synthesis-text-in {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer Zone */
.footer-zone {
    background-color: var(--color-primary-bg);
    padding: 4rem 2rem;
    text-align: center;
    font-family: var(--font-ui);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    z-index: 2;
}

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

    .thesis-column {
        grid-column: 1;
    }

    .antithesis-column {
        grid-column: 1;
    }

    .empty-space {
        display: none;
    }

    .vertical-rule {
        display: none;
    }

    .floating-kanji {
        font-size: clamp(1.5rem, 3vw, 3rem);
    }

    .floating-kanji:nth-child(n+5) {
        display: none;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-secondary-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-secondary-accent);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-accent);
}