@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap');

:root {
    --bg-deep: #020804;
    --bg-panel: #0a120a;
    --bg-panel-inner: #0d160d;
    --matrix-green: #00ff41;
    --matrix-dim: #00aa2a;
    --matrix-faint: #004d14;
    --matrix-glow: rgba(0, 255, 65, 0.35);
    --amber: #ffb000;
    --red-alert: #ff3333;
    --text-primary: #b8ffc8;
    --text-dim: #5a9a6a;
    --border: #1a4d1a;
    --font-mono: 'Share Tech Mono', 'Consolas', 'Courier New', monospace;
}

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

html, body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg-deep);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
}

#matrix-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.22;
    pointer-events: none;
}

.scanlines {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.12) 0px,
        rgba(0, 0, 0, 0.12) 1px,
        transparent 1px,
        transparent 3px
    );
    animation: flicker 8s infinite;
}

.vignette {
    position: fixed;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    background: radial-gradient(ellipse at center, transparent 40%, rgba(0, 0, 0, 0.75) 100%);
}

.hacker-layout {
    position: relative;
    z-index: 3;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 16px 40px;
}

.side-art {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    opacity: 0.18;
    pointer-events: none;
    color: var(--matrix-dim);
    font-size: 10px;
    line-height: 1.15;
    white-space: pre;
    user-select: none;
}

.side-art-left { left: 8px; }
.side-art-right { right: 8px; }

.terminal-window {
    width: min(820px, 100%);
    background: linear-gradient(160deg, rgba(10, 22, 10, 0.94) 0%, rgba(6, 14, 6, 0.97) 100%);
    border: 1px solid var(--border);
    border-radius: 4px;
    box-shadow:
        0 0 24px var(--matrix-glow),
        inset 0 0 40px rgba(0, 255, 65, 0.03);
    backdrop-filter: blur(2px);
    animation: boot-in 0.6s ease-out;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: linear-gradient(90deg, #071007, #0f1f0f);
    border-bottom: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.terminal-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.terminal-dot.red { background: #ff5f57; box-shadow: 0 0 6px #ff5f57; }
.terminal-dot.yellow { background: #febc2e; box-shadow: 0 0 6px #febc2e; }
.terminal-dot.green { background: #28c840; box-shadow: 0 0 6px #28c840; }

.terminal-title {
    flex: 1;
    text-align: center;
    color: var(--matrix-dim);
}

.terminal-body {
    padding: 28px 32px 32px;
    position: relative;
}

.ascii-banner {
    color: var(--matrix-green);
    font-size: 11px;
    line-height: 1.2;
    text-align: center;
    margin: 0 0 24px;
    text-shadow: 0 0 8px var(--matrix-glow);
    white-space: pre;
    overflow-x: auto;
}

.status-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
    margin-top: 28px;
    padding-top: 16px;
    border-top: 1px dashed var(--matrix-faint);
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 0.05em;
}

.status-bar span::before {
    content: '▸ ';
    color: var(--matrix-dim);
}

.blink {
    animation: blink 1.1s step-end infinite;
}

h4 {
    color: var(--matrix-green);
    font-size: 1.05rem;
    font-weight: 400;
    line-height: 1.5;
    margin: 0 0 20px;
    padding: 12px 16px;
    border-left: 3px solid var(--matrix-dim);
    background: rgba(0, 255, 65, 0.04);
    text-shadow: 0 0 12px rgba(0, 255, 65, 0.2);
}

p {
    max-width: 700px;
    word-wrap: anywhere;
    color: var(--text-primary);
    margin: 16px 0;
}

a {
    color: var(--matrix-green);
    text-decoration: none;
    border-bottom: 1px dotted var(--matrix-dim);
    transition: color 0.2s, text-shadow 0.2s;
}

a:hover {
    color: #fff;
    text-shadow: 0 0 10px var(--matrix-green);
    border-bottom-color: var(--matrix-green);
}

img {
    max-width: 100%;
    border: 1px solid var(--border);
    box-shadow: 0 0 16px rgba(0, 255, 65, 0.15);
    margin: 12px 0;
}

#loading {
    color: var(--amber);
    font-size: 14px;
    letter-spacing: 0.1em;
}

#loading:not(:empty)::after {
    content: '';
    animation: blink 0.8s step-end infinite;
}

.prompt-line {
    color: var(--text-dim);
    margin-bottom: 8px;
    font-size: 13px;
}

.prompt-line::before {
    content: 'root@puzzle:~$ ';
    color: var(--matrix-dim);
}

.version-tag {
    display: inline-block;
    margin-bottom: 16px;
    padding: 2px 10px;
    font-size: 11px;
    letter-spacing: 0.15em;
    color: var(--amber);
    border: 1px solid rgba(255, 176, 0, 0.35);
    background: rgba(255, 176, 0, 0.06);
}

.corner-brackets {
    position: absolute;
    width: 24px;
    height: 24px;
    border-color: var(--matrix-faint);
    border-style: solid;
    pointer-events: none;
}

.corner-brackets.tl { top: 12px; left: 12px; border-width: 2px 0 0 2px; }
.corner-brackets.tr { top: 12px; right: 12px; border-width: 2px 2px 0 0; }
.corner-brackets.bl { bottom: 12px; left: 12px; border-width: 0 0 2px 2px; }
.corner-brackets.br { bottom: 12px; right: 12px; border-width: 0 2px 2px 0; }

.hex-rain {
    position: fixed;
    z-index: 2;
    pointer-events: none;
    font-size: 10px;
    color: var(--matrix-faint);
    opacity: 0.35;
    writing-mode: vertical-rl;
    animation: drift 20s linear infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

@keyframes flicker {
    0%, 100% { opacity: 1; }
    92% { opacity: 1; }
    93% { opacity: 0.85; }
    94% { opacity: 1; }
    96% { opacity: 0.9; }
    97% { opacity: 1; }
}

@keyframes boot-in {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes drift {
    from { transform: translateY(-10vh); }
    to { transform: translateY(110vh); }
}

@media (max-width: 900px) {
    .side-art { display: none; }
    .terminal-body { padding: 20px 18px 24px; }
    .ascii-banner { font-size: 8px; }
}