/* kkaji.com - Urban Graffiti Stencil + Ma Negative Space */
/* Fonts: Space Grotesk, Noto Sans KR, Inter, JetBrains Mono */

:root {
    --color-bg: #f3f4f6;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e8ebed;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-900: #1f2937;
    --color-cool-mid: #c9cdd2;
    --color-red: #8b3a3a;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

/* Thin scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
}

body {
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    color: var(--color-gray-700);
    background-color: var(--color-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Spray paint texture overlay */
.spray-texture {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='256' height='256' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
    background-size: 256px 256px;
}

/* Chapter sections */
.chapter {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Ma breathing zones */
.ma-zone {
    height: 60vh;
    background: linear-gradient(180deg, var(--color-gray-100) 0%, var(--color-gray-200) 40%, var(--color-gray-300) 70%, var(--color-gray-200) 90%, var(--color-gray-100) 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ma-line {
    width: 61.8%;
    height: 1px;
    background-color: var(--color-gray-400);
    opacity: 0;
    transition: opacity 1s ease;
}

.ma-line.visible {
    opacity: 0.3;
}

/* Watermark character */
.watermark {
    position: absolute;
    font-family: 'Noto Sans KR', sans-serif;
    font-weight: 700;
    font-size: 60vw;
    color: var(--color-gray-700);
    opacity: 0.04;
    transform: rotate(-5deg);
    pointer-events: none;
    z-index: 1;
    line-height: 1;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-5deg);
}

/* Chapter content positioning */
.chapter-content {
    position: relative;
    z-index: 10;
    max-width: 40%;
    padding: 2rem;
}

.chapter-content-lowerleft {
    position: absolute;
    bottom: 15%;
    left: 20%;
}

.chapter-content-upperright {
    position: absolute;
    top: 15%;
    right: 10%;
}

.chapter-content-center {
    text-align: center;
}

.chapter-content-upper-center {
    position: absolute;
    top: 18%;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

/* Stencil border */
.stencil-border {
    border: 2px dashed var(--color-gray-400);
    padding: 2rem 3rem;
}

/* Stencil title */
.stencil-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: clamp(48px, 8vw, 120px);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    line-height: 1.0;
    color: var(--color-gray-700);
}

.stencil-dot {
    color: var(--color-red);
}

/* Korean subtitle */
.korean-subtitle {
    font-family: 'Noto Sans KR', sans-serif;
    font-weight: 300;
    font-size: 80px;
    color: var(--color-gray-600);
    margin-top: 0.3em;
    letter-spacing: 0.05em;
}

/* Stencil headings */
.stencil-heading {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: clamp(36px, 6vw, 90px);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    line-height: 1.0;
    color: var(--color-gray-700);
}

/* Reach character - the emotional peak */
.reach-char {
    font-family: 'Noto Sans KR', sans-serif;
    font-weight: 700;
    font-size: clamp(100px, 20vw, 160px);
    color: var(--color-red);
    line-height: 1;
}

/* Mono labels */
.mono-label {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 300;
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gray-400);
    margin-bottom: 1.5em;
}

.mono-coords {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 400;
    font-size: clamp(11px, 1.2vw, 14px);
    letter-spacing: 0.08em;
    color: var(--color-gray-500);
    margin-top: 0.8em;
}

/* Body text */
.body-text {
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    font-size: clamp(14px, 1.2vw, 16px);
    line-height: 1.8;
    color: var(--color-gray-500);
    max-width: 400px;
}

.beyond-text {
    font-family: 'Noto Sans KR', sans-serif;
    font-weight: 300;
    font-size: clamp(18px, 2vw, 24px);
    color: var(--color-gray-600);
    max-width: none;
}

/* Crosshair marks */
.crosshair {
    position: absolute;
    font-family: 'JetBrains Mono', monospace;
    font-size: 18px;
    color: var(--color-gray-400);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 10;
    pointer-events: none;
}

.crosshair.visible {
    opacity: 1;
}

.crosshair-above {
    top: calc(50% - 200px);
    left: 50%;
    transform: translateX(-50%);
}

.crosshair-corner1 {
    top: 25%;
    left: 15%;
}

.crosshair-corner2 {
    bottom: 30%;
    right: 20%;
}

/* Construction line extending from content */
.construction-line {
    position: relative;
    height: 1px;
    background-color: var(--color-gray-400);
    margin-top: 2em;
    width: 0;
    transition: width 1.2s ease-out;
}

.construction-line.visible {
    width: calc(100% + 200px);
    margin-left: -200px;
}

/* Concrete fragments */
.concrete-fragment {
    position: absolute;
    z-index: 5;
    box-shadow: 4px 4px 0 var(--color-gray-400);
}

.concrete-fragment svg {
    display: block;
    width: 100%;
    height: auto;
}

.fragment-1 {
    right: 12%;
    top: 15%;
    width: 200px;
}

.fragment-2 {
    left: 8%;
    bottom: 18%;
    width: 300px;
}

.fragment-pair {
    position: absolute;
    bottom: 15%;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 120px;
    z-index: 5;
}

.fragment-4a,
.fragment-4b {
    position: relative;
    width: 200px;
    box-shadow: 4px 4px 0 var(--color-gray-400);
}

/* Dotted grid background */
.dotted-grid-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle, var(--color-gray-300) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: 0.5;
    z-index: 1;
}

/* Terminal line at bottom of Beyond */
.terminal-line {
    position: absolute;
    bottom: 80px;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--color-gray-400);
    opacity: 0;
    transition: opacity 1s ease;
}

.terminal-line.visible {
    opacity: 1;
}

/* Chapter backgrounds */
.chapter-threshold {
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-200) 50%, var(--color-gray-100) 100%);
}

.chapter-limit {
    background: linear-gradient(200deg, var(--color-gray-100) 0%, var(--color-gray-200) 60%, var(--color-gray-300) 100%);
}

.chapter-reach {
    background-color: var(--color-gray-100);
}

.chapter-boundary {
    background-color: var(--color-gray-100);
}

.chapter-beyond {
    background-color: var(--color-gray-100);
}

/* Slide animation base states */
.slide-left {
    opacity: 0;
    transform: translateX(-60px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.slide-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.6s ease-out 0.2s, transform 0.6s ease-out 0.2s;
}

.slide-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .chapter-content {
        max-width: 80%;
        padding: 1.5rem;
    }

    .chapter-content-lowerleft {
        left: 8%;
    }

    .chapter-content-upperright {
        right: 5%;
    }

    .stencil-border {
        padding: 1.5rem 2rem;
    }

    .korean-subtitle {
        font-size: 48px;
    }

    .fragment-1 {
        right: 5%;
        width: 140px;
    }

    .fragment-2 {
        left: 3%;
        width: 200px;
    }

    .fragment-pair {
        gap: 40px;
    }

    .fragment-4a,
    .fragment-4b {
        width: 140px;
    }

    .ma-zone {
        height: 40vh;
    }
}

@media (max-width: 480px) {
    .chapter-content {
        max-width: 90%;
    }

    .stencil-title {
        letter-spacing: 0.08em;
    }

    .stencil-heading {
        letter-spacing: 0.08em;
    }

    .concrete-fragment,
    .fragment-pair {
        display: none;
    }

    .stencil-border {
        padding: 1rem 1.5rem;
    }

    .korean-subtitle {
        font-size: 36px;
    }
}