:root {
    --bg: #0b0d12;
    --bg-elev: #11141b;
    --bg-elev-2: #181c25;
    --border: #232836;
    --text: #e6e8ee;
    --text-dim: #9aa3b2;
    --text-dimmer: #5f6878;
    --accent: #7c5cff;
    --accent-hover: #9a82ff;
    --accent-glow: rgba(124, 92, 255, 0.25);
    --success: #3ddc97;
    --warning: #ffb547;
    --danger: #ff5c8a;
    --code-bg: #0e1219;
    --radius: 10px;
    --radius-lg: 14px;
    --transition: 180ms ease;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    background-image: radial-gradient(circle at 20% -10%, rgba(124,92,255,0.18), transparent 40%),
                      radial-gradient(circle at 110% 10%, rgba(61,220,151,0.10), transparent 40%);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 1.5rem 1.25rem 4rem; }

/* ─── Nav ─── */
nav {
    display: flex; align-items: center; gap: 1.5rem;
    padding: 1rem 0; border-bottom: 1px solid var(--border);
    margin-bottom: 2.5rem;
}
nav .logo {
    font-size: 1.4rem; font-weight: 700;
    color: var(--text); margin-right: auto; letter-spacing: -0.02em;
}
nav .logo .dot { color: var(--accent); }
nav a.nav-link { color: var(--text-dim); font-weight: 500; font-size: 0.95rem; }
nav a.nav-link:hover { color: var(--text); text-decoration: none; }

/* ─── Hero ─── */
.hero { text-align: center; margin-bottom: 2.5rem; }
.hero .ascii-logo {
    font-family: ui-monospace, "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
    font-variant-ligatures: none;
    white-space: pre;
    line-height: 1;
    font-size: clamp(0.55rem, 1.7vw, 1.05rem);
    margin: 0 auto 1.5rem;
    display: inline-block;
    color: var(--text);
    background: none;
    border: none;
    padding: 0;
    overflow: visible;
}
.hero .ascii-logo code {
    background: none;
    border: none;
    padding: 0;
    font-size: inherit;
    font-family: inherit;
    color: inherit;
}
.hero .ascii-logo .slash {
    color: var(--accent);
}
.hero h1 {
    font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 700;
    letter-spacing: -0.025em; line-height: 1.1; margin-bottom: 0.85rem;
}
.hero h1 .gradient {
    background: linear-gradient(120deg, var(--accent) 10%, #4cc9f0 100%);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero p.lead {
    font-size: 1.1rem; color: var(--text-dim);
    max-width: 640px; margin: 0 auto;
}

/* ─── Format pill bar ─── */
.formats {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem;
    margin: 1.75rem 0 2.5rem;
}
.format-pill {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.4rem 0.9rem; border-radius: 999px;
    background: var(--bg-elev); border: 1px solid var(--border);
    font-size: 0.85rem; font-weight: 500; color: var(--text-dim);
    cursor: not-allowed; user-select: none;
}
.format-pill.active {
    background: var(--accent-glow); border-color: var(--accent);
    color: var(--text); cursor: pointer;
    box-shadow: 0 0 0 3px rgba(124,92,255,0.12);
}
.format-pill .badge {
    font-size: 0.65rem; padding: 0.1rem 0.4rem; border-radius: 4px;
    background: var(--bg-elev-2); color: var(--text-dimmer); font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.05em;
}
.format-pill.active .badge {
    background: var(--accent); color: #fff;
}

/* ─── Drop zone ─── */
.dropzone {
    display: block;
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    background: var(--bg-elev);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}
.dropzone:hover, .dropzone.drag-over {
    border-color: var(--accent); background: var(--bg-elev-2);
    box-shadow: 0 0 0 4px rgba(124,92,255,0.08);
}
.dropzone svg { width: 48px; height: 48px; stroke: var(--accent); margin-bottom: 1rem; }
.dropzone h2 { font-size: 1.25rem; font-weight: 600; margin-bottom: 0.4rem; }
.dropzone p { color: var(--text-dim); font-size: 0.95rem; }
.dropzone input[type=file] { display: none; }
.dropzone .small { font-size: 0.8rem; color: var(--text-dimmer); margin-top: 0.75rem; }

/* ─── Result panel ─── */
.result {
    margin-top: 2rem; background: var(--bg-elev); border: 1px solid var(--border);
    border-radius: var(--radius-lg); overflow: hidden;
    display: none;
}
.result.visible { display: block; }
.result-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.85rem 1.1rem; background: var(--bg-elev-2);
    border-bottom: 1px solid var(--border); flex-wrap: wrap; gap: 0.5rem;
}
.result-meta { font-size: 0.85rem; color: var(--text-dim); }
.result-meta strong { color: var(--text); }
.actions { display: flex; gap: 0.5rem; }
.btn {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.5rem 0.95rem; font-size: 0.85rem; font-weight: 600;
    border-radius: 8px; border: 1px solid var(--border);
    background: var(--bg-elev); color: var(--text);
    cursor: pointer; transition: var(--transition);
    font-family: inherit;
}
.btn:hover { border-color: var(--accent); color: var(--accent-hover); }
.btn.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.result pre {
    margin: 0; padding: 1.1rem; max-height: 480px; overflow: auto;
    font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.82rem; line-height: 1.55; color: var(--text);
    background: var(--code-bg); white-space: pre-wrap; word-break: break-word;
}

/* ─── Status / errors ─── */
.status {
    margin-top: 1rem; padding: 0.75rem 1rem; border-radius: 8px;
    font-size: 0.9rem; display: none;
}
.status.visible { display: block; }
.status.loading { background: var(--bg-elev); color: var(--text-dim); border: 1px solid var(--border); }
.status.error { background: rgba(255,92,138,0.08); color: var(--danger); border: 1px solid rgba(255,92,138,0.25); }
.status.success { background: rgba(61,220,151,0.08); color: var(--success); border: 1px solid rgba(61,220,151,0.25); }

/* ─── Sections ─── */
section.block {
    margin-top: 3.5rem; padding-top: 2.5rem;
    border-top: 1px solid var(--border);
}
section.block h2 {
    font-size: 1.6rem; font-weight: 700; margin-bottom: 1rem;
    letter-spacing: -0.02em;
}
section.block p { color: var(--text-dim); margin-bottom: 0.85rem; }

/* feature grid */
.grid {
    display: grid; gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    margin-top: 1.5rem;
}
.card {
    padding: 1.25rem; background: var(--bg-elev); border: 1px solid var(--border);
    border-radius: var(--radius);
}
.card h3 { font-size: 1rem; margin-bottom: 0.4rem; color: var(--text); }
.card p { font-size: 0.9rem; color: var(--text-dim); margin: 0; }

/* code blocks */
code, pre code {
    font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    background: var(--code-bg); border: 1px solid var(--border);
    padding: 0.15rem 0.4rem; border-radius: 4px; font-size: 0.85em;
}
pre {
    background: var(--code-bg); border: 1px solid var(--border);
    padding: 0.95rem 1.1rem; border-radius: var(--radius);
    overflow-x: auto; margin: 0.85rem 0;
}
pre code { background: none; border: none; padding: 0; }

/* faq */
.faq-item {
    padding: 1rem 0; border-bottom: 1px solid var(--border);
}
.faq-item:last-child { border-bottom: none; }
.faq-item h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.4rem; color: var(--text); }
.faq-item p { font-size: 0.9rem; color: var(--text-dim); margin: 0; }

footer {
    margin-top: 4rem; padding: 2rem 0 1rem; text-align: center;
    font-size: 0.85rem; color: var(--text-dimmer);
    border-top: 1px solid var(--border);
}
footer a { color: var(--text-dim); }

@media (max-width: 640px) {
    .container { padding: 1rem 1rem 3rem; }
    .dropzone { padding: 2rem 1rem; }
    nav { gap: 1rem; }
    nav a.nav-link { font-size: 0.9rem; }
    .formats { gap: 0.4rem; }
    .format-pill { font-size: 0.78rem; padding: 0.3rem 0.7rem; }
}