/* ============================================
   sora.quest — Techno-Wabi Design System
   ============================================ */

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

:root {
    --bg-primary: #0e0e12;
    --bg-secondary: #1a1a24;
    --text-primary: #d4d0cb;
    --text-secondary: #8a8680;
    --accent-sakura: #ff2d6f;
    --accent-sora: #00e5ff;
    --accent-amber: #ffd23f;
    --surface-marble: #2a2a34;
    --flash-bg: #12121a;

    --font-display: 'Lexend', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --font-mono: 'Share Tech Mono', monospace;

    --torii-inset: 24px;
    --ease-swift: cubic-bezier(0.25, 0, 0.1, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(0.95rem, 1.8vw, 1.15rem);
    line-height: 1.75;
    letter-spacing: 0.02em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Torii Frame (Sacred Boundary, Flattened Gate) --- */
.torii-frame {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0;
}

.torii-frame span {
    position: absolute;
    background-color: rgba(255, 45, 111, 0.15);
}

.torii-top {
    top: var(--torii-inset);
    left: var(--torii-inset);
    right: var(--torii-inset);
    height: 1px;
}

.torii-bottom {
    bottom: var(--torii-inset);
    left: var(--torii-inset);
    right: var(--torii-inset);
    height: 1px;
}

.torii-left {
    top: var(--torii-inset);
    left: var(--torii-inset);
    bottom: var(--torii-inset);
    width: 1px;
}

.torii-right {
    top: var(--torii-inset);
    right: var(--torii-inset);
    bottom: var(--torii-inset);
    width: 1px;
}

/* Torii glitch animation (60ms horizontal jitter) */
@keyframes torii-glitch-h {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(var(--glitch-offset, 4px)); }
}

.torii-top.glitching,
.torii-bottom.glitching {
    animation: torii-glitch-h 60ms steps(1) 1;
}

/* Torii border fade-in on entry */
@keyframes torii-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.torii-frame.entering {
    animation: torii-fade-in 800ms var(--ease-swift) forwards;
}

/* --- Corrupted Kanji Ghost (固定, glitch every 20-30s) --- */
.kanji-ghost {
    position: fixed;
    bottom: calc(var(--torii-inset) + 20px);
    right: calc(var(--torii-inset) + 20px);
    font-family: var(--font-mono);
    font-size: 180px;
    line-height: 1;
    color: var(--text-secondary);
    opacity: 0.03;
    transform: rotate(-3deg);
    pointer-events: none;
    z-index: 999;
    user-select: none;
}

.kanji-ghost.glitching {
    opacity: 0.08;
    transform: rotate(-3deg) translate(4px, -2px);
    animation: kanji-glitch 200ms steps(1) 1;
}

@keyframes kanji-glitch {
    0%, 100% { opacity: 0.08; transform: rotate(-3deg) translate(4px, -2px); }
    50% { opacity: 0.03; transform: rotate(-3deg) translate(0, 0); }
}

/* --- Screen Flash Element (for neon "power on" effect) --- */
.screen-flash {
    position: fixed;
    inset: 0;
    background-color: var(--flash-bg);
    opacity: 0;
    pointer-events: none;
    z-index: 2000;
}

.screen-flash.flash-active {
    animation: neon-flash 40ms steps(1) 1;
}

@keyframes neon-flash {
    0% { opacity: 1; }
    100% { opacity: 0; }
}

/* --- Content Wrapper (Z-Pattern Grid) --- */
.content-wrapper {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    padding: calc(var(--torii-inset) + clamp(2rem, 5vw, 4rem));
    display: flex;
    flex-direction: column;
    gap: clamp(1.5rem, 4vw, 3rem);
}

/* --- Z-Pattern: Upper Sweep (Entry Zone) --- */
.z-upper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
    min-height: 40vh;
    padding-top: clamp(2rem, 6vh, 5rem);
}

.z-upper-left {
    display: flex;
    align-items: flex-start;
}

.z-upper-right {
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    text-align: right;
    padding-top: clamp(1rem, 3vw, 2rem);
}

/* --- Logotype (Hero Display) --- */
.logotype {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(3rem, 8vw, 7rem);
    letter-spacing: 0.12em;
    text-transform: lowercase;
    line-height: 1;
    white-space: nowrap;
    position: relative;
    transform-origin: top left;
    will-change: transform;
}

.logotype .logo-text {
    color: var(--text-primary);
    display: inline-block;
}

.logotype .logo-dot {
    color: var(--accent-sakura);
    display: inline-block;
}

.logotype .char {
    opacity: 0;
    display: inline-block;
    transition: opacity 0ms;
}

.logotype .char.typed {
    opacity: 1;
}

/* Logotype glitch effect (120ms, clip-path slices with text-shadow) */
.logotype.glitch-active {
    text-shadow:
        -2px 0 var(--accent-sakura),
        2px 0 var(--accent-sora);
}

/* --- Thesis Statement --- */
.thesis {
    max-width: 38ch;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-weight: 400;
    opacity: 0;
    transform: translateY(12px);
}

.thesis.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 600ms var(--ease-swift), transform 600ms var(--ease-swift);
}

/* --- Meta Labels (Debug Output Style) --- */
.meta-label {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: clamp(0.65rem, 1.1vw, 0.8rem);
    letter-spacing: 0.18em;
    color: var(--text-secondary);
    opacity: 0.5;
    text-transform: uppercase;
    display: block;
}

/* --- Wave Dividers (SVG wave-forms) --- */
.wave-divider {
    width: 100%;
    height: 12px;
    overflow: hidden;
}

.wave-divider svg {
    width: 100%;
    height: 100%;
}

.divider-wave-path {
    will-change: stroke;
}

/* --- Z-Pattern: Mid Crossing (Core Content) --- */
.z-mid {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: center;
    min-height: 50vh;
    opacity: 0;
    transform: translateY(16px);
}

.z-mid.revealed {
    opacity: 1;
    transform: translateY(0);
}

.z-mid-left {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-self: end;
    padding-bottom: clamp(1rem, 3vw, 2rem);
}

.z-mid-center {
    margin-top: -4vh;
}

.z-mid-right {
    align-self: start;
    padding-top: clamp(2rem, 4vw, 3rem);
}

.secondary-text {
    max-width: 38ch;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(0.85rem, 1.5vw, 1rem);
    line-height: 1.75;
}

/* --- Marble Textured Hero Surface --- */
.marble-filter-svg {
    position: absolute;
    width: 0;
    height: 0;
}

.marble-hero {
    position: relative;
}

.marble-surface {
    position: relative;
    background-color: var(--surface-marble);
    background-image:
        radial-gradient(ellipse at 30% 70%, rgba(255, 45, 111, 0.06) 0%, transparent 60%),
        linear-gradient(135deg, rgba(255, 255, 255, 0.02) 0%, transparent 50%, rgba(255, 255, 255, 0.01) 100%);
    padding: clamp(2rem, 5vw, 4rem);
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.marble-surface::before {
    content: '';
    position: absolute;
    inset: 0;
    filter: url(#marble-texture);
    opacity: 0.15;
    pointer-events: none;
}

.marble-inner {
    position: relative;
    z-index: 1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(1rem, 2vw, 1.5rem);
}

.marble-text {
    max-width: 38ch;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-weight: 500;
    font-size: clamp(1rem, 2vw, 1.25rem);
    line-height: 1.75;
}

.marble-meta {
    opacity: 0.35;
}

/* --- Z-Pattern: Lower Sweep (Navigation & Departure) --- */
.z-lower {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: end;
    min-height: 30vh;
    padding-bottom: clamp(1rem, 3vw, 2rem);
    opacity: 0;
    transform: translateY(16px);
}

.z-lower.revealed {
    opacity: 1;
    transform: translateY(0);
}

.z-lower-left {
    /* Left: navigation links */
}

.z-lower-center {
    text-align: center;
    align-self: end;
}

.z-lower-right {
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
}

/* --- Navigation Links (Interactive Elements) --- */
.lower-nav {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.nav-link {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(0.85rem, 1.4vw, 1rem);
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 0.02em;
    position: relative;
    display: inline-block;
    transition: color 200ms var(--ease-swift);
    background-image: linear-gradient(var(--accent-sora), var(--accent-sora));
    background-size: 0% 1px;
    background-repeat: no-repeat;
    background-position: left bottom;
    padding-bottom: 2px;
}

.nav-link:hover {
    color: var(--accent-sora);
    background-size: 100% 1px;
    transition: color 200ms var(--ease-swift), background-size 300ms var(--ease-swift);
}

.nav-link:active {
    transform: translate(1px, 1px);
}

.nav-link:focus-visible {
    outline: 2px solid var(--accent-amber);
    outline-offset: 4px;
}

/* Wave-form echo on hover (::after pseudo-element) */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    width: 24px;
    height: 4px;
    transform: translateX(-50%);
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 4'%3E%3Cpath d='M0,2 C4,0.5 8,3.5 12,2 C16,0.5 20,3.5 24,2' fill='none' stroke='%23ff2d6f' stroke-width='1' stroke-opacity='0.6'/%3E%3C/svg%3E") no-repeat center;
    background-size: 100% 100%;
    opacity: 0;
    transition: opacity 200ms var(--ease-swift);
}

.nav-link:hover::after {
    opacity: 1;
    animation: wave-echo 2s linear infinite;
}

@keyframes wave-echo {
    from { transform: translateX(-50%); }
    to { transform: translateX(calc(-50% - 24px)); }
}

/* --- Footer Wave Animation --- */
.footer-wave {
    width: 200px;
    height: 80px;
    overflow: visible;
    opacity: 0;
}

.footer-wave.visible {
    opacity: 1;
    transition: opacity 1200ms var(--ease-swift);
}

.footer-wave svg {
    width: 100%;
    height: 100%;
}

.wave-path {
    will-change: transform;
}

.wave-1 {
    animation: wave-drift-1 8s linear infinite;
}

.wave-2 {
    animation: wave-drift-2 12s linear infinite;
}

.wave-3 {
    animation: wave-drift-3 18s linear infinite;
}

@keyframes wave-drift-1 {
    from { transform: translateX(0); }
    to { transform: translateX(-200px); }
}

@keyframes wave-drift-2 {
    from { transform: translateX(0); }
    to { transform: translateX(-200px); }
}

@keyframes wave-drift-3 {
    from { transform: translateX(0); }
    to { transform: translateX(-200px); }
}

/* --- Scroll-Triggered Element Reveal (Glitch-Fade Entry) --- */
@keyframes glitch-fade-in {
    0% {
        opacity: 0;
        transform: translateY(16px);
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }
    13% {
        opacity: 0.7;
        clip-path: polygon(0 0, 100% 0, 100% 33%, 0 33%);
        transform: translateY(16px) translateX(3px);
    }
    14% {
        clip-path: polygon(0 33%, 100% 33%, 100% 66%, 0 66%);
        transform: translateY(16px) translateX(-4px);
    }
    15% {
        clip-path: polygon(0 66%, 100% 66%, 100% 100%, 0 100%);
        transform: translateY(16px) translateX(2px);
    }
    16% {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
        transform: translateY(12px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }
}

.glitch-enter {
    animation: glitch-fade-in 460ms var(--ease-swift) forwards;
}

/* --- Responsive Design (Below 768px) --- */
@media (max-width: 768px) {
    :root {
        --torii-inset: 12px;
    }

    .z-upper {
        grid-template-columns: 1fr;
        min-height: auto;
        padding-top: clamp(2rem, 4vh, 3rem);
    }

    .z-upper-right {
        text-align: left;
        justify-content: flex-start;
        padding-top: 0;
    }

    .z-mid {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .z-mid-left {
        align-self: auto;
        padding-bottom: 0;
    }

    .z-mid-center {
        margin-top: 0;
    }

    .z-mid-right {
        align-self: auto;
        padding-top: 0;
        text-align: right;
    }

    .z-lower {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .z-lower-right {
        justify-content: flex-start;
    }

    .content-wrapper {
        gap: clamp(3rem, 8vh, 6rem);
    }

    .secondary-text {
        text-align: right;
    }

    .z-lower-center {
        text-align: left;
    }

    .kanji-ghost {
        font-size: 100px;
    }
}

/* --- Text Selection --- */
::selection {
    background-color: rgba(255, 45, 111, 0.25);
    color: var(--text-primary);
}