:root {
    --green: #00ff88;
    --green-bright: #39ff14;
    --green-dark: #003318;
    --black: #050a05;
    --surface: #0a120a;
    --surface2: #0f1f0f;
    --border: rgba(0, 255, 136, 0.15);
    --border-bright: rgba(0, 255, 136, 0.4);
}

* { box-sizing: border-box; }

button, input, select, textarea {
    font: inherit;
}

button {
    background: none;
    border: 0;
    color: inherit;
    padding: 0;
    margin: 0;
    cursor: pointer;
}

button:disabled {
    cursor: wait;
    opacity: 0.7;
}

.absolute { position: absolute; }
.fixed { position: fixed; }
.relative { position: relative; }
.block { display: block; }
.hidden { display: none; }
.flex { display: flex; }
.grid { display: grid; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.flex-1 { flex: 1 1 0%; }
.flex-wrap { flex-wrap: wrap; }
.grid-cols-1 { grid-template-columns: minmax(0, 1fr); }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-5 { gap: 1.25rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.space-y-2 > * + * { margin-top: 0.5rem; }
.space-y-3 > * + * { margin-top: 0.75rem; }
.space-y-4 > * + * { margin-top: 1rem; }
.space-y-5 > * + * { margin-top: 1.25rem; }
.space-y-6 > * + * { margin-top: 1.5rem; }
.w-4 { width: 1rem; }
.w-full { width: 100%; }
.h-4 { height: 1rem; }
.h-64 { height: 16rem; }
.h-px { height: 1px; }
.min-h-screen { min-height: 100vh; }
.max-h-\[90vh\] { max-height: 90vh; }
.max-w-xs { max-width: 20rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-7xl { max-width: 80rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-10 { margin-bottom: 2.5rem; }
.mb-12 { margin-bottom: 3rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.ml-auto { margin-left: auto; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-5 { padding-left: 1.25rem; padding-right: 1.25rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }
.py-1\.5 { padding-top: 0.375rem; padding-bottom: 0.375rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-2\.5 { padding-top: 0.625rem; padding-bottom: 0.625rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.py-20 { padding-top: 5rem; padding-bottom: 5rem; }
.pt-2 { padding-top: 0.5rem; }
.pt-4 { padding-top: 1rem; }
.pt-16 { padding-top: 4rem; }
.pb-4 { padding-bottom: 1rem; }
.inset-0 { inset: 0; }
.top-0 { top: 0; }
.top-4 { top: 1rem; }
.top-1\/2 { top: 50%; }
.right-0 { right: 0; }
.right-3 { right: 0.75rem; }
.right-4 { right: 1rem; }
.right-6 { right: 1.5rem; }
.bottom-6 { bottom: 1.5rem; }
.left-0 { left: 0; }
.-translate-y-1\/2 { transform: translateY(-50%); }
.overflow-hidden { overflow: hidden; }
.overflow-y-auto { overflow-y: auto; }
.cursor-pointer { cursor: pointer; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-2xl { border-radius: 1rem; }
.rounded-full { border-radius: 9999px; }
.border-t { border-top: 1px solid var(--border); }
.border-b { border-bottom: 1px solid var(--border); }
.text-left { text-align: left; }
.text-center { text-align: center; }
.font-sans { font-family: 'Syne', sans-serif; }
.font-mono { font-family: 'Space Mono', monospace; }
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-4xl { font-size: 2.25rem; line-height: 2.5rem; }
.text-5xl { font-size: 3rem; line-height: 1; }
.font-bold { font-weight: 700; }
.font-black { font-weight: 900; }
.italic { font-style: italic; }
.leading-none { line-height: 1; }
.leading-tight { line-height: 1.25; }
.leading-snug { line-height: 1.375; }
.leading-relaxed { line-height: 1.625; }
.tracking-widest { letter-spacing: 0.1em; }
.text-white { color: #fff; }
.text-green-500 { color: var(--green); }
.text-red-400 { color: #f87171; }
.opacity-30 { opacity: 0.3; }
.opacity-40 { opacity: 0.4; }
.opacity-50 { opacity: 0.5; }
.opacity-60 { opacity: 0.6; }
.opacity-80 { opacity: 0.8; }
.transition-all { transition: all 0.2s ease; }
.transition-colors { transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease; }
.transition-opacity { transition: opacity 0.2s ease; }
.line-clamp-2 {
    line-clamp: 2;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}
.hover\:opacity-100:hover { opacity: 1; }
.hover\:border-green-500:hover { border-color: var(--green); }
.hover\:bg-green-900:hover { background: var(--green-dark); }
.hover\:bg-red-900:hover { background: #3f0a14; }
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }

@media (min-width: 640px) {
    .sm\:block { display: block; }
    .sm\:flex { display: flex; }
    .sm\:gap-4 { gap: 1rem; }
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .sm\:p-8 { padding: 2rem; }
    .sm\:px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
    .sm\:text-4xl { font-size: 2.25rem; line-height: 2.5rem; }
    .sm\:text-7xl { font-size: 4.5rem; line-height: 1; }
}

@media (min-width: 768px) {
    .md\:block { display: block; }
    .md\:hidden { display: none; }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

html, body {
    background: var(--black);
    color: #d4f5d4;
    font-family: 'Syne', sans-serif;
    scroll-behavior: smooth;
    min-height: 100vh;
}

/* ── Animated gradient background ─────────────── */
#bg-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.12;
    animation: float linear infinite;
}

.orb-1 {
    width: 600px; height: 600px;
    background: radial-gradient(circle, #00ff88, transparent);
    top: -200px; left: -100px;
    animation-duration: 20s;
}
.orb-2 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, #39ff14, transparent);
    bottom: -100px; right: -100px;
    animation-duration: 25s;
    animation-delay: -8s;
}
.orb-3 {
    width: 300px; height: 300px;
    background: radial-gradient(circle, #00cc5c, transparent);
    top: 50%; left: 50%;
    animation-duration: 30s;
    animation-delay: -15s;
}

@keyframes float {
    0%   { transform: translate(0, 0) scale(1); }
    25%  { transform: translate(60px, 40px) scale(1.1); }
    50%  { transform: translate(20px, 80px) scale(0.95); }
    75%  { transform: translate(-30px, 30px) scale(1.05); }
    100% { transform: translate(0, 0) scale(1); }
}

/* ── Scan lines overlay ──────────────────────── */
#bg-canvas::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.03) 2px,
    rgba(0,0,0,0.03) 4px
    );
    pointer-events: none;
}

/* ── Glassmorphism card ─────────────────────── */
.glass {
    background: rgba(10, 18, 10, 0.7);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
}

.glass-bright {
    background: rgba(10, 18, 10, 0.85);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-bright);
}

/* ── Neon glow effects ──────────────────────── */
.glow-text {
    text-shadow: 0 0 20px rgba(0, 255, 136, 0.6),
                0 0 40px rgba(0, 255, 136, 0.3);
}

.glow-border {
    box-shadow: 0 0 0 1px var(--green),
                0 0 20px rgba(0, 255, 136, 0.2),
                inset 0 0 20px rgba(0, 255, 136, 0.05);
}

.glow-btn {
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.4);
    transition: all 0.2s ease;
}
.glow-btn:hover {
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.7),
                0 0 60px rgba(0, 255, 136, 0.3);
    transform: translateY(-1px);
}

/* ── Tutorial card hover ────────────────────── */
.tut-card {
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.tut-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-bright);
    box-shadow: 0 8px 40px rgba(0, 255, 136, 0.12);
}

/* ── Nav ────────────────────────────────────── */
nav {
    background: rgba(5, 10, 5, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

/* ── Input styling ──────────────────────────── */
.inp {
    background: rgba(0, 255, 136, 0.04);
    border: 1px solid var(--border);
    color: #d4f5d4;
    font-family: 'Space Mono', monospace;
    font-size: 0.875rem;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    width: 100%;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}
.inp:focus {
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1);
}
.inp::placeholder { color: rgba(212, 245, 212, 0.3); }

textarea.inp { resize: vertical; min-height: 120px; }

/* ── Markdown content ───────────────────────── */
.md-content h1, .md-content h2, .md-content h3 {
    color: var(--green);
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    margin: 1.5rem 0 0.75rem;
}
.md-content h1 { font-size: 1.75rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
.md-content h2 { font-size: 1.35rem; }
.md-content h3 { font-size: 1.1rem; }
.md-content p { margin: 0.75rem 0; line-height: 1.8; }
.md-content code {
    background: rgba(0,255,136,0.08);
    border: 1px solid var(--border);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-family: 'Space Mono', monospace;
    font-size: 0.85em;
    color: var(--green);
}
.md-content pre {
    background: rgba(0,0,0,0.5);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1rem 0;
    position: relative;
}
.md-content pre code {
    background: none;
    border: none;
    padding: 0;
    color: #a8f5a8;
    font-size: 0.875rem;
}
.md-content ul, .md-content ol {
    padding-left: 1.5rem;
    margin: 0.75rem 0;
}
.md-content li { margin: 0.35rem 0; }
.md-content blockquote {
    border-left: 3px solid var(--green);
    padding-left: 1rem;
    margin: 1rem 0;
    color: rgba(212,245,212,0.7);
    font-style: italic;
}
.md-content a { color: var(--green); text-decoration: underline; }
.md-content strong { color: #fff; }
.md-content hr { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }
.md-content table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
.md-content th { background: rgba(0,255,136,0.08); color: var(--green); padding: 0.5rem; border: 1px solid var(--border); text-align: left; }
.md-content td { padding: 0.5rem; border: 1px solid var(--border); }

/* ── Tag pills ──────────────────────────────── */
.tag {
    background: rgba(0,255,136,0.08);
    border: 1px solid rgba(0,255,136,0.2);
    color: var(--green);
    font-size: 0.7rem;
    font-family: 'Space Mono', monospace;
    padding: 0.2rem 0.6rem;
    border-radius: 100px;
    cursor: pointer;
    transition: background 0.15s;
}
.tag:hover { background: rgba(0,255,136,0.18); }

/* ── Avatar circle ──────────────────────────── */
.avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-family: 'Space Mono', monospace;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
}

/* ── Category color dot ─────────────────────── */
.cat-dot { width: 8px; height: 8px; border-radius: 50%; }

/* ── Scrollbar ──────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: rgba(0,255,136,0.25); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,255,136,0.5); }

/* ── Modal ──────────────────────────────────── */
#modal-overlay {
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(4px);
}

/* ── Toast ──────────────────────────────────── */
#toast {
    transition: transform 0.3s ease, opacity 0.3s ease;
    transform: translateY(100px);
    opacity: 0;
}
#toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* ── Loader ─────────────────────────────────── */
.spinner {
    width: 20px; height: 20px;
    border: 2px solid rgba(0,255,136,0.2);
    border-top-color: var(--green);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Page transitions ───────────────────────── */
.page { animation: fadeIn 0.3s ease; }
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Cover band on card ─────────────────────── */
.cover-band {
    height: 4px;
    border-radius: 8px 8px 0 0;
}

/* ── Stats counter animation ────────────────── */
@keyframes countUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.stat-num { animation: countUp 0.5s ease forwards; }

/* ── Logo glitch ─────────────────────────────── */
@keyframes glitch {
    0%, 100% { text-shadow: 0 0 20px rgba(0,255,136,0.6); }
    20% { text-shadow: 2px 0 0 rgba(57,255,20,0.8), -2px 0 0 rgba(0,255,136,0.8); }
    40% { text-shadow: -2px 0 0 rgba(57,255,20,0.8), 2px 0 0 rgba(0,255,136,0.8); }
    60% { text-shadow: 0 0 30px rgba(0,255,136,0.9); }
}
.logo { animation: glitch 4s ease infinite; }

/* ── Editor toolbar ──────────────────────────── */
.toolbar-btn {
    background: rgba(0,255,136,0.06);
    border: 1px solid var(--border);
    color: rgba(212,245,212,0.7);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: 'Space Mono', monospace;
    cursor: pointer;
    transition: all 0.15s;
}
.toolbar-btn:hover {
    background: rgba(0,255,136,0.15);
    color: var(--green);
    border-color: rgba(0,255,136,0.4);
}