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

:root {
    font-size: 100%;

    --size-h1: 1.25rem;
    --size-body: 1rem;
    --size-meta: 0.75rem;
    --size-small: 0.625rem;

    --ls-wide: 0.25em;
    --ls-normal: 0.1em;
    --ls-tight: -0.01em;

    --lh-tight: 1.2;
    --lh-normal: 1.6;

    --color-bg: #0d1013;
    --color-text: #f1f1f1;
    --color-point: #e63946;
    --color-point-sub: #a8dadc;
    
    --op-high: rgba(241, 241, 241, 0.85);
    --op-mid: rgba(241, 241, 241, 0.5);
    --op-low: rgba(241, 241, 241, 0.15);
    --op-ghost: rgba(241, 241, 241, 0.05);

    --color-border: rgba(255, 255, 255, 0.06);
    --color-nav-bg: rgba(13, 16, 19, 0.95);

    --font-data: 'JetBrains Mono', monospace;
}

body, html {
    width: 100%;
    height: 100%;
    background-color: var(--color-bg);
    overflow: hidden;
    font-family: 'Pretendard', sans-serif;
}

#interaction-canvas {
    position: relative;
    width: 100vw;
    height: 100vh;
    background-color: var(--color-bg);
    overflow: hidden;
    cursor: crosshair;
    background-image: radial-gradient(var(--op-low) 1px, transparent 1px);
    background-size: 40px 40px;
}

#background-instruction {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--op-ghost);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    white-space: nowrap;
    z-index: 0;
    pointer-events: none;
    user-select: none;
    font-family: 'Pretendard', sans-serif;
}

.system-declaration {
    position: absolute;
    bottom: 3rem;
    width: 100%;
    text-align: center;
    font-size: var(--size-small);
    font-weight: 300;
    color: var(--op-mid);
    letter-spacing: -0.01em;
    z-index: 2; 
    pointer-events: none;
}

#line-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    stroke-linecap: square;
    transition: stroke-width 0.3s ease, opacity 0.3s ease;
}

#interaction-canvas {
    position: relative;
    width: 100vw;
    height: 100vh;
    background-color: var(--color-bg);
    overflow: hidden;
    --capture-width: 1920;
    --capture-height: 1080;
    cursor: crosshair;
    background-image: radial-gradient(var(--op-low) 1px, transparent 1px);
    background-size: 40px 40px;
}

.is-capturing {
    width: 1920px !important;
    height: 1080px !important;
}

#interaction-shield {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    background: transparent;
    cursor: crosshair;
}

#interaction-canvas, .word-data, .system-declaration {
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-user-drag: none;
}

#evasive-button {
    position: absolute;
    padding: 12px 24px;
    background-color: var(--color-bg);
    color: var(--color-point);
    border: 1px solid var(--color-point); /* 3px은 너무 두꺼우니 1px로 예리하게 */
    font-size: var(--size-meta);
    font-weight: 700;
    box-shadow: 0 0 10px rgba(230, 57, 70, 0.2);
    transition: all 0.3s cubic-bezier(0.19, 1, 0.22, 1);
    z-index: 3;
    cursor: default;
    white-space: nowrap;
}

#evasive-button.clickable {
    cursor: pointer;
    background-color: var(--color-point);
    color: var(--color-text);
    box-shadow: 0 0 20px rgba(230, 57, 70, 0.4);
    z-index: 1001;
    cursor: pointer;
}

#word-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
}

.word-data {
    position: absolute;
    color: #ffffff;
    font-family: var(--font-data);
    font-weight: 500;
    letter-spacing: -0.02em;
    white-space: nowrap;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 10;
    
    transition: opacity 0.2s ease, font-size 0.2s ease;
}

@keyframes wordPop {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.7);
    }
    100% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

#custom-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

#custom-modal.modal-visible {
    opacity: 1;
    pointer-events: auto;
}

#custom-modal.modal-hidden {
    display: none;
}

.modal-content {
    background-color: var(--color-bg);
    padding: 3.5rem;
    border: 1px solid var(--color-point);
    box-shadow: 30px 30px 0px rgba(255, 0, 0, 0.1);
    text-align: center;
}

.modal-content p {
    color: var(--color-text);
    font-size: var(--size-body);
    font-weight: 700;
    line-height: 1.6;
    margin-bottom: 30px;
}

#modal-confirm-btn {
    background-color: var(--color-bg);
    color: var(--color-text);
    border-color: 1px solid var(--color-point);
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 800;
    cursor: pointer;
    transition: background-color 0.2s;
}

#modal-confirm-btn:hover {
    background-color: var(--color-point);
}

#capture-watermark {
    position: absolute;
    bottom: 2.5rem;
    right: 2.5rem;
    color: var(--op-mid);
    font-size: var(--size-small);
    font-family: var(--font-data);
    font-weight: 200;
    text-align: right;
    line-height: 1.4;
    letter-spacing: 0.05em;
    z-index: 100;
    pointer-events: none;
    text-transform: uppercase;
}

#system-data-report {
    position: absolute;
    top: 2.5rem;
    left: 2.5rem;
    color: var(--op-mid);
    font-size: var(--size-small);
    font-family: var(--font-data);
    line-height: 1.8;
    letter-spacing: 0.1em;
    z-index: 100;
    pointer-events: none;
    text-transform: uppercase;
}