/* ===================================================
   showa.boo - Showa-era Pop x Analog Signal Decay
   =================================================== */

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

:root {
    --obsidian-void: #111114;
    --charcoal-slab: #1A1A1E;
    --pewter-iron: #2A2A2E;
    --silver-mist: #C8C8D2;
    --slate-dusk: #5C5C6E;
    --ash-silk: #D4D4DC;
    --neon-sakura: #FF2D6A;
    --electric-jade: #00E5CC;
    --aged-bourbon: #3A3530;
    --text-light: #B0B0BC;
    --text-dark: #2A2A2E;
    --caption-gray: #6E6E7A;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--obsidian-void);
    color: var(--silver-mist);
    font-family: 'Work Sans', sans-serif;
    font-weight: 400;
    font-size: clamp(1rem, 1.2vw, 1.25rem);
    line-height: 1.75;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* --- SVG Defs (hidden) --- */
.svg-defs {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

/* ===================================================
   Scan Line Overlay
   =================================================== */
#scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 2px,
        var(--obsidian-void) 2px,
        var(--obsidian-void) 3px
    );
    opacity: 0.15;
}

#scanlines.scanlines-intense {
    opacity: 0.25;
}

/* ===================================================
   Frame Tear Effect
   =================================================== */
#frame-tear {
    position: fixed;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--pewter-iron);
    z-index: 999;
    pointer-events: none;
    opacity: 0;
    transform: translateX(0);
}

#frame-tear.tearing-right {
    opacity: 1;
    transform: translateX(6px);
}

#frame-tear.tearing-left {
    opacity: 1;
    transform: translateX(-3px);
}

/* ===================================================
   Navigation Dot
   =================================================== */
#nav-dot {
    position: fixed;
    top: 24px;
    left: 24px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--slate-dusk);
    z-index: 1100;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}

#nav-dot-inner {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-light);
    opacity: 0;
    transition: opacity 0.3s ease;
}

#nav-dot:hover #nav-dot-inner {
    opacity: 1;
}

#nav-dot:hover {
    transform: scale(1.3);
}

@keyframes nav-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(92, 92, 110, 0.4); }
    50% { box-shadow: 0 0 0 6px rgba(92, 92, 110, 0); }
}

#nav-dot {
    animation: nav-pulse 3s infinite;
}

/* ===================================================
   Navigation Overlay
   =================================================== */
#nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(17, 17, 20, 0.97);
    z-index: 1050;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

#nav-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.nav-overlay-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 2rem;
    color: var(--silver-mist);
    cursor: pointer;
    z-index: 1060;
    transition: color 0.2s ease;
}

.nav-overlay-close:hover {
    color: var(--neon-sakura);
}

.nav-strip {
    padding: 1.5rem 3rem;
    transform: skewY(-4deg);
    margin: 4px 0;
    transition: background 0.2s ease;
}

.nav-strip:nth-child(odd) {
    transform: skewY(4deg);
}

.nav-strip:hover {
    background: var(--pewter-iron);
}

.nav-link {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(2rem, 6vw, 5rem);
    letter-spacing: 0.15em;
    color: var(--silver-mist);
    text-decoration: none;
    text-transform: uppercase;
    display: inline-block;
    text-shadow: 3px 3px 0 var(--charcoal-slab);
    transition: color 0.15s ease;
}

.nav-link:hover {
    color: var(--neon-sakura);
}

/* ===================================================
   Panel Base Styles
   =================================================== */
.panel {
    position: relative;
    width: 100vw;
    min-height: 100vh;
    overflow: hidden;
    opacity: 0.3;
    transition: opacity 0.4s steps(4);
}

.panel.panel-visible {
    opacity: 1;
}

/* Diagonal clipping - left leaning panels */
.panel-left {
    clip-path: polygon(0 8%, 100% 0, 100% 92%, 0 100%);
    margin-top: -100px;
}

.panel-right {
    clip-path: polygon(0 0, 100% 10%, 100% 100%, 0 90%);
    margin-top: -100px;
}

.panel-steep.panel-right {
    clip-path: polygon(0 0, 100% 12%, 100% 100%, 0 88%);
}

.panel-shallow.panel-right {
    clip-path: polygon(0 0, 100% 5%, 100% 100%, 0 95%);
}

/* First panel no negative margin */
.panel:first-of-type {
    margin-top: 0;
}

/* Z-index stacking: odd above even */
.panel:nth-of-type(odd) {
    z-index: 3;
}

.panel:nth-of-type(even) {
    z-index: 2;
}

/* Panel edge shadow */
.panel::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--pewter-iron);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

/* --- Panel Background Variants --- */
.panel-leather {
    background: var(--aged-bourbon);
}

.panel-leather::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 30%, rgba(58, 53, 48, 0.8) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(58, 53, 48, 0.6) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(42, 42, 46, 0.5) 0%, transparent 70%);
    filter: url(#leather-noise-fine);
    pointer-events: none;
    z-index: 0;
}

.panel-dark {
    background: var(--obsidian-void);
}

.panel-mid {
    background: var(--pewter-iron);
}

.panel-charcoal {
    background: var(--charcoal-slab);
}

/* --- Panel Inner Layout (8-column asymmetric grid) --- */
.panel-inner {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 100vh;
    display: grid;
    grid-template-columns: repeat(5, 1fr) 4rem repeat(3, 1fr);
    align-items: center;
    padding: 6rem 3rem;
    z-index: 1;
}

.panel-content {
    grid-column: 1 / 6;
    position: relative;
    z-index: 2;
}

.panel-content.text-right {
    grid-column: 4 / 9;
    text-align: right;
}

.panel-content.panel-content-center {
    grid-column: 1 / -1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.panel-decoration {
    grid-column: 7 / 9;
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: flex-end;
    align-items: flex-start;
}

.panel-decoration-left {
    grid-column: 1 / 3;
    justify-content: flex-start;
}

.panel-decoration-right {
    grid-column: 7 / 9;
    justify-content: flex-end;
}

/* ===================================================
   Typography
   =================================================== */
.hero-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(4rem, 12vw, 10rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--silver-mist);
    text-shadow: 3px 3px 0 var(--charcoal-slab);
    line-height: 1;
    position: relative;
    overflow: hidden;
}

.panel-headline {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(3rem, 8vw, 7rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--silver-mist);
    text-shadow: 3px 3px 0 var(--charcoal-slab);
    line-height: 1;
    margin-bottom: 2rem;
}

.statement-text {
    font-family: 'Work Sans', sans-serif;
    font-size: clamp(1.2rem, 2.5vw, 2rem);
    font-weight: 400;
    color: var(--text-light);
    line-height: 1.75;
    margin-bottom: 1.5rem;
}

.caption-text {
    font-family: 'Inconsolata', monospace;
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: #6E6E7A;
    display: block;
}

.emphasis-word {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(6rem, 20vw, 18rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--silver-mist);
    text-shadow: 3px 3px 0 var(--charcoal-slab);
    line-height: 1;
    text-align: center;
    width: 100%;
}

.closing-domain {
    font-family: 'Inconsolata', monospace;
    font-size: clamp(0.9rem, 1.5vw, 1.2rem);
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--slate-dusk);
    display: block;
    margin-bottom: 1rem;
}

.closing-caption {
    font-family: 'Inconsolata', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    color: var(--slate-dusk);
    opacity: 0.6;
}

/* ===================================================
   Glitch Effects
   =================================================== */

/* RGB Split on hover for text blocks */
.glitch-hover {
    position: relative;
    transition: text-shadow 0.2s steps(3);
}

.glitch-hover:hover,
.glitch-hover.glitching {
    text-shadow:
        -2px 0 var(--neon-sakura),
        2px 0 var(--electric-jade),
        3px 3px 0 var(--charcoal-slab);
}

/* Permanent RGB split for emphasis */
.rgb-split-permanent {
    position: relative;
    text-shadow:
        -2px 0 var(--neon-sakura),
        2px 0 var(--electric-jade),
        3px 3px 0 var(--charcoal-slab);
    animation: rgb-jitter 3s infinite steps(3);
}

@keyframes rgb-jitter {
    0%, 90%, 100% {
        text-shadow:
            -2px 0 var(--neon-sakura),
            2px 0 var(--electric-jade),
            3px 3px 0 var(--charcoal-slab);
    }
    92% {
        text-shadow:
            -3px 1px var(--neon-sakura),
            3px -1px var(--electric-jade),
            3px 3px 0 var(--charcoal-slab);
    }
    95% {
        text-shadow:
            -1px -1px var(--neon-sakura),
            1px 1px var(--electric-jade),
            3px 3px 0 var(--charcoal-slab);
    }
    97% {
        text-shadow:
            -4px 0 var(--neon-sakura),
            4px 0 var(--electric-jade),
            3px 3px 0 var(--charcoal-slab);
    }
}

/* Glitch permanent text (hero) */
.glitch-text-permanent {
    position: relative;
}

.glitch-text-permanent::before,
.glitch-text-permanent::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    font-family: inherit;
    font-size: inherit;
    letter-spacing: inherit;
    text-transform: inherit;
    line-height: inherit;
}

.glitch-text-permanent::before {
    color: var(--neon-sakura);
    z-index: -1;
    animation: glitch-shift-1 4s infinite steps(2);
    clip-path: inset(0 0 50% 0);
}

.glitch-text-permanent::after {
    color: var(--electric-jade);
    z-index: -1;
    animation: glitch-shift-2 4s infinite steps(2);
    clip-path: inset(50% 0 0 0);
}

@keyframes glitch-shift-1 {
    0%, 88%, 100% { transform: translate(0); }
    90% { transform: translate(-3px, 1px); }
    94% { transform: translate(2px, -1px); }
    96% { transform: translate(-1px, 0); }
}

@keyframes glitch-shift-2 {
    0%, 85%, 100% { transform: translate(0); }
    87% { transform: translate(3px, -1px); }
    91% { transform: translate(-2px, 1px); }
    95% { transform: translate(1px, 0); }
}

/* ===================================================
   Halftone Dot Overlay
   =================================================== */
.halftone-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    background-image: radial-gradient(circle, var(--obsidian-void) 1px, transparent 1px);
    background-size: 6px 6px;
    opacity: 0.12;
}

/* ===================================================
   Seigaiha Wave Border
   =================================================== */
.seigaiha-border {
    position: absolute;
    left: 0;
    width: 100%;
    height: 40px;
    z-index: 5;
    pointer-events: none;
    background:
        radial-gradient(circle at 10px 40px, transparent 18px, var(--slate-dusk) 18px, var(--slate-dusk) 19.5px, transparent 19.5px),
        radial-gradient(circle at 10px 40px, transparent 12px, var(--slate-dusk) 12px, var(--slate-dusk) 13.5px, transparent 13.5px),
        radial-gradient(circle at 10px 40px, transparent 6px, var(--slate-dusk) 6px, var(--slate-dusk) 7.5px, transparent 7.5px),
        radial-gradient(circle at 30px 40px, transparent 18px, var(--slate-dusk) 18px, var(--slate-dusk) 19.5px, transparent 19.5px),
        radial-gradient(circle at 30px 40px, transparent 12px, var(--slate-dusk) 12px, var(--slate-dusk) 13.5px, transparent 13.5px),
        radial-gradient(circle at 30px 40px, transparent 6px, var(--slate-dusk) 6px, var(--slate-dusk) 7.5px, transparent 7.5px);
    background-size: 40px 40px;
    opacity: 0.3;
}

.seigaiha-top {
    top: 0;
}

.seigaiha-bottom {
    bottom: 0;
}

/* ===================================================
   Target Composition (Panel 3)
   =================================================== */
.target-composition {
    position: absolute;
    right: -10vw;
    top: 50%;
    transform: translateY(-50%);
    width: 60vw;
    height: 60vw;
    max-width: 700px;
    max-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.target-ring {
    position: absolute;
    border-radius: 50%;
    border: 3px solid;
}

.target-ring-1 {
    width: 100%;
    height: 100%;
    border-color: var(--pewter-iron);
}

.target-ring-2 {
    width: 80%;
    height: 80%;
    border-color: var(--slate-dusk);
}

.target-ring-3 {
    width: 60%;
    height: 60%;
    border-color: var(--ash-silk);
    opacity: 0.5;
}

.target-ring-4 {
    width: 40%;
    height: 40%;
    border-color: var(--slate-dusk);
}

.target-ring-5 {
    width: 20%;
    height: 20%;
    border-color: var(--pewter-iron);
}

.target-center {
    width: 10%;
    height: 10%;
    border-radius: 50%;
    background: var(--pewter-iron);
    transition: background 0.2s steps(3);
    z-index: 1;
}

.target-center.burst {
    background: var(--neon-sakura);
    box-shadow: 0 0 40px var(--neon-sakura);
}

/* ===================================================
   Texture Grid (Panel 4)
   =================================================== */
.texture-grid {
    display: grid;
    grid-template-columns: repeat(3, 120px);
    grid-template-rows: repeat(2, 120px);
    gap: 16px;
}

.texture-tile {
    width: 120px;
    height: 120px;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.texture-tile:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.tile-label {
    position: absolute;
    bottom: 6px;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'Inconsolata', monospace;
    font-size: 0.65rem;
    color: var(--slate-dusk);
    letter-spacing: 0.05em;
    white-space: nowrap;
}

/* Individual texture tiles */
.texture-leather {
    background: var(--aged-bourbon);
    background-image:
        radial-gradient(circle at 30% 40%, rgba(58, 53, 48, 0.6) 0%, transparent 40%),
        radial-gradient(circle at 70% 60%, rgba(42, 42, 46, 0.4) 0%, transparent 50%);
}

.texture-halftone {
    background: var(--charcoal-slab);
    background-image: radial-gradient(circle, var(--obsidian-void) 1px, transparent 1px);
    background-size: 6px 6px;
}

.texture-scanline {
    background: var(--pewter-iron);
    background-image: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 2px,
        var(--obsidian-void) 2px,
        var(--obsidian-void) 3px
    );
}

.texture-seigaiha {
    background: var(--charcoal-slab);
    background-image:
        radial-gradient(circle at 10px 20px, transparent 9px, var(--slate-dusk) 9px, var(--slate-dusk) 10px, transparent 10px),
        radial-gradient(circle at 10px 20px, transparent 5px, var(--slate-dusk) 5px, var(--slate-dusk) 6px, transparent 6px),
        radial-gradient(circle at 30px 20px, transparent 9px, var(--slate-dusk) 9px, var(--slate-dusk) 10px, transparent 10px),
        radial-gradient(circle at 30px 20px, transparent 5px, var(--slate-dusk) 5px, var(--slate-dusk) 6px, transparent 6px);
    background-size: 40px 20px;
}

.texture-chrysanthemum {
    background: var(--charcoal-slab);
}

.texture-chrysanthemum svg,
.texture-bamboo svg {
    width: 80px;
    height: 80px;
}

.texture-bamboo {
    background: var(--charcoal-slab);
}

/* ===================================================
   SVG Draw Animation
   =================================================== */
.svg-draw path,
.svg-draw line,
.svg-draw circle,
.svg-draw ellipse {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    transition: stroke-dashoffset 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.svg-draw.drawn path,
.svg-draw.drawn line,
.svg-draw.drawn circle,
.svg-draw.drawn ellipse {
    stroke-dashoffset: 0;
}

/* Chrysanthemum positioning */
.chrysanthemum {
    width: 200px;
    height: 200px;
}

/* Bamboo positioning */
.bamboo {
    width: 60px;
    height: 300px;
}

/* Pine branch positioning */
.pine-branch {
    width: 160px;
    height: 240px;
}

.pine-left {
    align-self: stretch;
    align-items: center;
}

.pine-right {
    align-self: stretch;
    align-items: center;
}

/* ===================================================
   Static Burst
   =================================================== */
.static-burst {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0;
    z-index: 10;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='1'/%3E%3C/filter%3E%3Crect width='100' height='100' filter='url(%23n)' opacity='0.3'/%3E%3C/svg%3E");
    background-size: 100px 100px;
    mix-blend-mode: overlay;
}

.static-burst.active {
    opacity: 1;
    animation: static-shift 0.15s steps(4) forwards;
}

@keyframes static-shift {
    0% { background-position: 0 0; }
    25% { background-position: 30px -20px; }
    50% { background-position: -15px 40px; }
    75% { background-position: 50px 10px; }
    100% { background-position: 0 0; opacity: 0; }
}

/* ===================================================
   Panel 1 Specifics
   =================================================== */
#panel-1 {
    min-height: 100vh;
    display: flex;
    align-items: flex-end;
    padding-bottom: 0;
}

#panel-1 .panel-inner {
    align-items: flex-end;
    padding-bottom: 4rem;
}

#panel-1 .hero-title {
    margin-bottom: -0.15em;
}

/* ===================================================
   Panel 5 Specifics
   =================================================== */
#panel-5 .panel-inner {
    grid-template-columns: 1fr 6fr 1fr;
    justify-items: center;
}

#panel-5 .panel-content {
    grid-column: 2;
    display: flex;
    align-items: center;
    justify-content: center;
}

#panel-5 .panel-decoration-left {
    grid-column: 1;
}

#panel-5 .panel-decoration-right {
    grid-column: 3;
}

/* ===================================================
   Panel 6 Specifics
   =================================================== */
#panel-6 .panel-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
}

/* ===================================================
   Responsive
   =================================================== */
@media (max-width: 768px) {
    .panel-inner {
        grid-template-columns: 1fr;
        padding: 4rem 1.5rem;
    }

    .panel-content,
    .panel-content.text-right {
        grid-column: 1;
        text-align: left;
    }

    .panel-decoration,
    .panel-decoration-left,
    .panel-decoration-right {
        grid-column: 1;
        justify-content: center;
        margin-top: 2rem;
    }

    .hero-title {
        font-size: clamp(3rem, 14vw, 6rem);
    }

    .emphasis-word {
        font-size: clamp(4rem, 18vw, 10rem);
    }

    .target-composition {
        position: relative;
        right: 0;
        top: 0;
        transform: none;
        width: 80vw;
        height: 80vw;
        margin: 2rem auto;
    }

    .texture-grid {
        grid-template-columns: repeat(2, 100px);
        grid-template-rows: repeat(3, 100px);
    }

    .texture-tile {
        width: 100px;
        height: 100px;
    }

    #panel-5 .panel-inner {
        grid-template-columns: 1fr;
    }

    #panel-5 .panel-content {
        grid-column: 1;
    }

    #panel-5 .panel-decoration-left,
    #panel-5 .panel-decoration-right {
        display: none;
    }

    .nav-link {
        font-size: clamp(1.5rem, 8vw, 3rem);
    }
}