:root {
    --void: #090014;
    --glass: #1a103c;
    --chrome: #e0e0e0;
    --magenta: #ff00ff;
    --cyan: #00ffff;
    --orange: #ff9900;
    --dark-purple: #2d1b4e;
    --danger: #ff5c5c;
}

* {
    box-sizing: border-box;
}

[x-cloak] {
    display: none !important;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--void);
    color: var(--chrome);
    font-family: "Share Tech Mono", monospace;
    overflow-x: hidden;
}

.cyber-sun {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 580px;
    height: 580px;
    border-radius: 50%;
    background: linear-gradient(to bottom, var(--orange), var(--magenta));
    transform: translate(-50%, -50%);
    filter: blur(95px);
    opacity: 0.16;
    z-index: 0;
    pointer-events: none;
}

.perspective-grid {
    position: fixed;
    inset: auto 0 0 0;
    height: 100vh;
    background-image: linear-gradient(transparent 95%, var(--magenta) 95%),
        linear-gradient(90deg, transparent 95%, var(--magenta) 95%);
    background-size: 40px 40px;
    transform: perspective(500px) rotateX(60deg) translateY(100px) scale(2);
    mask-image: linear-gradient(to top, rgba(0, 0, 0, 1) 10%, transparent 60%);
    -webkit-mask-image: linear-gradient(
        to top,
        rgba(0, 0, 0, 1) 10%,
        transparent 60%
    );
    z-index: 0;
    pointer-events: none;
}

.layout {
    position: relative;
    z-index: 5;
    max-width: 1300px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 16px;
}

.panel {
    background: rgba(26, 16, 60, 0.9);
    border: 1px solid rgba(255, 0, 255, 0.3);
    border-top: 2px solid var(--cyan);
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.08);
    backdrop-filter: blur(6px);
}

.panel-topbar {
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 8px 12px;
    border-bottom: 1px solid rgba(0, 255, 255, 0.4);
    background: rgba(0, 255, 255, 0.08);
}

.dot {
    width: 10px;
    height: 10px;
    display: inline-block;
}

.dot.magenta {
    background: var(--magenta);
}

.dot.cyan {
    background: var(--cyan);
}

.dot.orange {
    background: var(--orange);
}

.term-id {
    margin-left: auto;
    font-size: 12px;
    letter-spacing: 0.08em;
    opacity: 0.75;
}

.sidebar {
    display: flex;
    flex-direction: column;
}

.sidebar-body {
    padding: 16px;
}

.sidebar-title {
    margin: 0;
    font-family: "Orbitron", sans-serif;
    font-size: 24px;
    color: var(--cyan);
    text-shadow: 0 0 8px rgba(0, 255, 255, 0.5);
}

.sidebar-sub {
    margin: 8px 0 14px;
    opacity: 0.85;
}

.progress-wrap {
    border: 1px solid rgba(255, 0, 255, 0.3);
    background: rgba(0, 0, 0, 0.4);
    padding: 10px;
    margin-bottom: 16px;
}

.key {
    color: var(--magenta);
}

.challenge-list {
    display: grid;
    gap: 8px;
    margin-bottom: 14px;
}

.challenge-item {
    width: 100%;
    text-align: left;
    border: 1px solid rgba(0, 255, 255, 0.3);
    background: rgba(0, 0, 0, 0.45);
    color: var(--chrome);
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    cursor: pointer;
    font: inherit;
}

.challenge-item.active {
    border-color: var(--magenta);
    box-shadow: 0 0 14px rgba(255, 0, 255, 0.3);
}

.challenge-name {
    font-size: 14px;
}

.status-chip {
    font-size: 11px;
    padding: 2px 6px;
    border: 1px solid;
}

.status-chip.pending {
    color: var(--orange);
    border-color: var(--orange);
}

.status-chip.done {
    color: var(--cyan);
    border-color: var(--cyan);
}

.main-panel {
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 40px);
}

.main-content {
    padding: 20px;
    display: grid;
    gap: 16px;
}

.problem-title {
    margin: 0;
    font-family: "Orbitron", sans-serif;
    text-transform: uppercase;
    font-size: clamp(24px, 3.2vw, 40px);
    color: transparent;
    background: linear-gradient(90deg, var(--orange), var(--magenta), var(--cyan));
    -webkit-background-clip: text;
    background-clip: text;
    text-shadow: 0 0 15px rgba(255, 0, 255, 0.5);
}

.story {
    margin: 0;
    font-size: 17px;
    line-height: 1.45;
}

.box {
    border: 1px solid rgba(45, 27, 78, 1);
    background: rgba(0, 0, 0, 0.45);
    padding: 14px;
}

.box-title {
    margin: 0 0 8px;
    color: var(--cyan);
    font-family: "Orbitron", sans-serif;
    font-size: 18px;
}

.instructions {
    margin: 0;
    line-height: 1.5;
}

.input-data {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
    border: 1px solid rgba(0, 255, 255, 0.3);
    background: #030208;
    color: var(--cyan);
    padding: 12px;
    min-height: 90px;
    box-shadow: inset 0 0 20px rgba(0, 255, 255, 0.09);
}

.answer-hint {
    margin: 0 0 8px;
    color: rgba(224, 224, 224, 0.8);
}

.answer-input {
    width: 100%;
    border: 1px solid rgba(255, 0, 255, 0.5);
    background: #030208;
    color: var(--chrome);
    font: inherit;
    padding: 10px;
    resize: vertical;
}

.answer-input:focus-visible {
    outline: none;
    border-color: var(--cyan);
    box-shadow: 0 0 14px rgba(0, 255, 255, 0.35);
}

.actions {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.btn {
    border: 1px solid var(--cyan);
    background: transparent;
    color: var(--cyan);
    padding: 8px 12px;
    font: inherit;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.btn:hover {
    background: var(--cyan);
    color: #020202;
}

.btn.secondary {
    border-color: var(--magenta);
    color: var(--magenta);
}

.btn.secondary:hover {
    background: var(--magenta);
    color: #020202;
}

.btn.warning {
    border-color: var(--orange);
    color: var(--orange);
}

.btn.warning:hover {
    background: var(--orange);
    color: #020202;
}

.meta {
    margin: 10px 0 0;
    opacity: 0.8;
}

.feedback {
    margin: 8px 0 0;
    min-height: 24px;
    font-weight: 700;
}

.feedback.ok {
    color: var(--cyan);
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.7);
}

.feedback.bad {
    color: var(--magenta);
    text-shadow: 0 0 10px rgba(255, 0, 255, 0.6);
}

.feedback.warn {
    color: var(--orange);
    text-shadow: 0 0 10px rgba(255, 153, 0, 0.6);
}

.loading-screen {
    position: fixed;
    inset: 0;
    background: rgba(3, 2, 8, 0.95);
    display: grid;
    place-items: center;
    z-index: 100;
    transition: opacity 220ms ease;
}

.loading-screen.is-hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-panel {
    border: 1px solid rgba(0, 255, 255, 0.5);
    padding: 20px;
    text-align: center;
    background: rgba(26, 16, 60, 0.75);
}

.loading-title {
    margin: 0;
    font-family: "Orbitron", sans-serif;
    color: var(--cyan);
    font-size: 24px;
}

.loading-sub {
    margin: 8px 0 0;
}

.snippet-box {
    border: 1px solid rgba(0, 255, 255, 0.25);
    background: rgba(0, 0, 0, 0.4);
    padding: 10px;
}

.snippet-title {
    margin: 0 0 8px;
    color: var(--orange);
    font-family: "Orbitron", sans-serif;
    font-size: 15px;
}

.snippet-code {
    margin: 0;
    font-size: 12px;
    line-height: 1.4;
    color: var(--chrome);
    white-space: pre-wrap;
    word-break: break-word;
}

.example-data,
.hint-data {
    margin: 8px 0 0;
    white-space: pre-wrap;
    word-break: break-word;
    border: 1px solid rgba(0, 255, 255, 0.25);
    background: #030208;
    color: var(--chrome);
    padding: 10px;
}

.example-result {
    margin: 8px 0 0;
    color: var(--cyan);
}

@media (max-width: 960px) {
    .layout {
        grid-template-columns: 1fr;
        padding: 12px;
    }

    .main-panel {
        min-height: auto;
    }
}