/* ============================================================
   WP2SHELL CTF — Main Stylesheet
   Dark mode + neon green/cyan cybersecurity theme
   ============================================================ */

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

:root {
    --bg-primary: #0a0e14;
    --bg-secondary: #12171f;
    --bg-card: #161c26;
    --bg-card-hover: #1a2130;
    --border-color: #1e2a3a;
    --border-active: #00ff88;
    --text-primary: #e0e6ed;
    --text-secondary: #8b95a5;
    --text-muted: #55606e;
    --accent-green: #00ff88;
    --accent-cyan: #00e5ff;
    --accent-green-dim: rgba(0, 255, 136, 0.15);
    --accent-cyan-dim: rgba(0, 229, 255, 0.1);
    --danger: #ff4d6a;
    --success: #00ff88;
    --warning: #ffb347;
    --font-mono: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', 'Monaco', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius: 6px;
    --radius-lg: 10px;
    --transition: 0.2s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* --- Container --- */
.ctf-container {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- Header --- */
.ctf-header {
    padding: 40px 0 30px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.ctf-header-inner {
    position: relative;
}

.ctf-logo {
    font-family: var(--font-mono);
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    text-shadow: 0 0 30px var(--accent-green-dim), 0 0 60px var(--accent-green-dim);
    margin-bottom: 8px;
}

.ctf-logo-bracket {
    color: var(--accent-cyan);
}

.ctf-logo-highlight {
    color: var(--accent-green);
}

.ctf-subtitle {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-secondary);
    letter-spacing: 0.03em;
}

/* --- Main --- */
.ctf-main {
    flex: 1;
    padding: 30px 0 40px;
}

/* --- Sections --- */
.ctf-section {
    margin-bottom: 24px;
}

.ctf-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    transition: border-color var(--transition);
}

.ctf-card:hover {
    border-color: rgba(0, 255, 136, 0.2);
}

.ctf-section-title {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    color: var(--accent-green);
    margin-bottom: 16px;
    letter-spacing: 0.02em;
}

/* --- Badges --- */
.ctf-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.ctf-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    font-weight: 500;
    letter-spacing: 0.03em;
    border: 1px solid;
}

.ctf-badge-cat {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    background: var(--accent-cyan-dim);
}

.ctf-badge-diff {
    color: var(--warning);
    border-color: var(--warning);
    background: rgba(255, 179, 71, 0.1);
}

.ctf-badge-author {
    color: var(--text-secondary);
    border-color: var(--text-muted);
    background: rgba(139, 149, 165, 0.08);
}

/* --- Info Grid --- */
.ctf-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

.ctf-info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.ctf-info-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.ctf-info-value {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-cyan);
    background: rgba(0, 229, 255, 0.06);
    padding: 3px 8px;
    border-radius: var(--radius);
    word-break: break-all;
}

/* --- Description --- */
.ctf-description p {
    margin-bottom: 12px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.ctf-description ul {
    list-style: none;
    padding-left: 0;
}

.ctf-description li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.ctf-description li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-family: var(--font-mono);
}

/* --- Rules --- */
.ctf-rules-list {
    list-style: none;
    padding: 0;
    counter-reset: rule-counter;
}

.ctf-rules-list li {
    counter-increment: rule-counter;
    padding: 8px 12px 8px 36px;
    margin-bottom: 6px;
    position: relative;
    color: var(--text-secondary);
    background: rgba(0, 255, 136, 0.03);
    border-radius: var(--radius);
    border-left: 2px solid transparent;
    transition: border-color var(--transition);
}

.ctf-rules-list li:hover {
    border-left-color: var(--accent-green);
}

.ctf-rules-list li::before {
    content: counter(rule-counter);
    position: absolute;
    left: 10px;
    color: var(--accent-green);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

/* --- Hints --- */
.ctf-hint-note {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 16px;
    font-style: italic;
}

.ctf-hints {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ctf-hint {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color var(--transition);
}

.ctf-hint[open] {
    border-color: var(--accent-green);
}

.ctf-hint-summary {
    padding: 12px 16px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-primary);
    background: var(--bg-secondary);
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background var(--transition);
}

.ctf-hint-summary:hover {
    background: var(--bg-card-hover);
}

.ctf-hint-summary::-webkit-details-marker {
    display: none;
}

.ctf-hint-icon {
    font-size: 0.7rem;
    color: var(--accent-cyan);
    transition: transform var(--transition);
}

.ctf-hint[open] .ctf-hint-icon {
    transform: rotate(90deg);
}

.ctf-hint-content {
    padding: 14px 20px;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    font-size: 0.88rem;
    line-height: 1.6;
    border-top: 1px solid var(--border-color);
    background: rgba(0, 229, 255, 0.03);
}

/* --- Flag Form --- */
.ctf-flag-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ctf-flag-input-group {
    display: flex;
    gap: 10px;
    align-items: stretch;
}

.ctf-flag-input {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.ctf-flag-input:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 12px var(--accent-green-dim);
}

.ctf-flag-input::placeholder {
    color: var(--text-muted);
}

.ctf-flag-submit {
    padding: 12px 28px;
    background: transparent;
    border: 1px solid var(--accent-green);
    border-radius: var(--radius);
    color: var(--accent-green);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 0.05em;
    transition: all var(--transition);
    white-space: nowrap;
}

.ctf-flag-submit:hover {
    background: var(--accent-green);
    color: var(--bg-primary);
    box-shadow: 0 0 20px var(--accent-green-dim);
}

.ctf-flag-submit:active {
    transform: scale(0.97);
}

.ctf-flag-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.ctf-flag-result {
    min-height: 24px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding: 8px 0;
    text-align: center;
    transition: all var(--transition);
}

.ctf-flag-result.correct {
    color: var(--success);
    text-shadow: 0 0 10px var(--accent-green-dim);
    animation: flagPulse 0.6s ease-out;
}

.ctf-flag-result.incorrect {
    color: var(--danger);
}

.ctf-flag-result.rate-limited {
    color: var(--warning);
}

@keyframes flagPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* --- Toast --- */
.ctf-toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-card);
    border: 1px solid var(--accent-green);
    border-radius: var(--radius-lg);
    padding: 14px 28px;
    color: var(--accent-green);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    z-index: 9999;
    box-shadow: 0 8px 32px rgba(0, 255, 136, 0.15);
    animation: toastIn 0.3s ease-out;
}

.ctf-toast.ctf-toast-hiding {
    animation: toastOut 0.3s ease-in forwards;
}

.ctf-toast.ctf-toast-error {
    border-color: var(--danger);
    color: var(--danger);
    box-shadow: 0 8px 32px rgba(255, 77, 106, 0.15);
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(20px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(-50%) translateY(0); }
    to { opacity: 0; transform: translateX(-50%) translateY(20px); }
}

/* --- Footer --- */
.ctf-footer {
    padding: 24px 0 30px;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.ctf-footer-inner p {
    color: var(--text-muted);
    font-size: 0.82rem;
    line-height: 1.6;
}

.ctf-footer-small {
    font-size: 0.75rem !important;
    opacity: 0.7;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .ctf-container {
        padding: 0 12px;
    }

    .ctf-header {
        padding: 24px 0 20px;
    }

    .ctf-logo {
        font-size: 2rem;
    }

    .ctf-subtitle {
        font-size: 0.8rem;
    }

    .ctf-card {
        padding: 20px;
    }

    .ctf-flag-input-group {
        flex-direction: column;
    }

    .ctf-flag-submit {
        width: 100%;
    }

    .ctf-info-grid {
        grid-template-columns: 1fr;
    }

    .ctf-badges {
        flex-direction: column;
    }

    .ctf-toast {
        left: 16px;
        right: 16px;
        transform: none;
    }

    @keyframes toastIn {
        from { opacity: 0; transform: translateY(20px); }
        to { opacity: 1; transform: translateY(0); }
    }

    @keyframes toastOut {
        from { opacity: 1; transform: translateY(0); }
        to { opacity: 0; transform: translateY(20px); }
    }
}

/* --- Utility for screen readers --- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

/* --- Selection --- */
::selection {
    background: var(--accent-green-dim);
    color: var(--accent-green);
}