/* ============================================================
   Ark Summarize — theme system (dark default + light)
   ============================================================ */
:root {
    --bg: #0b1220;
    --bg-elev: #111a2e;
    --bg-elev-2: #16223c;
    --surface: #0f1830;
    --border: #243353;
    --text: #e6edf7;
    --text-muted: #95a6c4;
    --primary: #6366f1;
    --primary-600: #4f46e5;
    --primary-soft: rgba(99, 102, 241, 0.15);
    --accent: #22d3ee;
    --success: #34d399;
    --danger: #f87171;
    --warning: #fbbf24;
    --code-bg: #0a1326;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
    --radius: 14px;
}

[data-theme="light"] {
    --bg: #f4f7fc;
    --bg-elev: #ffffff;
    --bg-elev-2: #eef2fb;
    --surface: #ffffff;
    --border: #d8e0ef;
    --text: #0f1830;
    --text-muted: #59657d;
    --primary: #4f46e5;
    --primary-600: #4338ca;
    --primary-soft: rgba(79, 70, 229, 0.1);
    --accent: #0891b2;
    --code-bg: #0f1830;
    --shadow: 0 10px 30px rgba(20, 30, 60, 0.12);
}

html { position: relative; min-height: 100%; font-size: 15px; }
@media (min-width: 768px) { html { font-size: 16px; } }

body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    transition: background-color .2s ease, color .2s ease;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-600); text-decoration: underline; }
.text-muted { color: var(--text-muted) !important; }
hr { border-color: var(--border); opacity: 1; }

/* ---- Navbar -------------------------------------------------- */
.navbar {
    background: color-mix(in srgb, var(--bg-elev) 85%, transparent) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border) !important;
    box-shadow: none !important;
}
.navbar .navbar-brand,
.navbar .nav-link { color: var(--text) !important; }
.navbar .nav-link:hover { color: var(--primary) !important; }
.navbar-brand { font-weight: 800; letter-spacing: -.3px; }
.brand-dot { color: var(--accent); }

/* ---- Cards & surfaces --------------------------------------- */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.card-header {
    background: var(--bg-elev-2);
    border-bottom: 1px solid var(--border);
    color: var(--text);
    border-top-left-radius: var(--radius) !important;
    border-top-right-radius: var(--radius) !important;
}

/* ---- Tables -------------------------------------------------- */
.table { color: var(--text); }
.table > :not(caption) > * > * { background: transparent; color: var(--text); border-bottom-color: var(--border); }

/* ---- Forms --------------------------------------------------- */
.form-control, .form-select {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    color: var(--text);
}
.form-control:focus, .form-select:focus {
    background: var(--bg-elev);
    color: var(--text);
    border-color: var(--primary);
    box-shadow: 0 0 0 .2rem var(--primary-soft);
}
.form-control::placeholder { color: var(--text-muted); }
.form-label { color: var(--text-muted); font-weight: 600; font-size: .82rem; text-transform: uppercase; letter-spacing: .4px; }
textarea.form-control { font-size: .95rem; line-height: 1.6; }

/* ---- Buttons ------------------------------------------------- */
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-600));
    border: none;
    font-weight: 600;
    box-shadow: 0 6px 16px var(--primary-soft);
    color: #fff;
}
.btn-primary:hover { filter: brightness(1.08); color: #fff; }
.btn-ghost {
    border: 1px solid var(--border);
    color: var(--text);
    background: transparent;
}
.btn-ghost:hover { background: var(--bg-elev-2); color: var(--text); }

/* ---- Code / console ----------------------------------------- */
pre, code { font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace; }
.code-block {
    position: relative;
    background: var(--code-bg);
    color: #cde3ff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    overflow-x: auto;
    font-size: .85rem;
    line-height: 1.55;
    white-space: pre-wrap;
    word-break: break-word;
}
.copy-btn {
    position: absolute; top: 8px; right: 8px;
    border: 1px solid var(--border); background: var(--bg-elev-2);
    color: var(--text); border-radius: 8px; padding: 2px 10px; font-size: .75rem; cursor: pointer;
}
.copy-btn:hover { background: var(--primary); color: #fff; }

/* JSON syntax tint (used on the landing page sample) */
.j-key { color: #7dd3fc; }
.j-str { color: #86efac; }
.j-num { color: #fca5a5; }

/* ---- Chips --------------------------------------------------- */
.chip {
    display: inline-flex; align-items: center; gap: .4rem;
    background: var(--primary-soft); color: var(--text);
    border: 1px solid var(--border); border-radius: 999px;
    padding: .25rem .7rem; font-size: .8rem; font-weight: 600;
}

/* ---- Tags (intent / summary / entity) ----------------------- */
.tag {
    display: inline-block; border-radius: 8px; padding: .2rem .6rem;
    font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .4px;
    margin-right: .4rem;
}
.tag-intent  { background: rgba(99,102,241,.18);  color: #a5b4fc; border: 1px solid rgba(99,102,241,.4); }
.tag-summary { background: rgba(34,211,238,.16);  color: #67e8f9; border: 1px solid rgba(34,211,238,.4); }
.tag-entity  { background: rgba(52,211,153,.16);  color: #6ee7b7; border: 1px solid rgba(52,211,153,.4); }

/* ---- Landing: feature list & stats -------------------------- */
.feature-list { list-style: none; padding: 0; margin: 1rem 0 0; }
.feature-list li { padding: .6rem 0; border-bottom: 1px solid var(--border); color: var(--text-muted); }
.feature-list li:last-child { border-bottom: 0; }
.stat { text-align: center; }
.stat-num { font-size: 2rem; font-weight: 800; color: var(--accent); letter-spacing: -1px; }
.stat-label { color: var(--text-muted); font-size: .85rem; }

/* ---- Tool: result grid & entity pills ----------------------- */
.result-grid {
    display: grid; grid-template-columns: 7rem 1fr; gap: .9rem 1.2rem; align-items: start;
}
@media (max-width: 575px) { .result-grid { grid-template-columns: 1fr; gap: .3rem 0; } .result-label { margin-top: .8rem; } }
.result-label { color: var(--text-muted); font-weight: 700; font-size: .8rem; text-transform: uppercase; letter-spacing: .4px; padding-top: .2rem; }
.entity-pill {
    display: inline-flex; align-items: center; gap: .45rem;
    background: var(--bg-elev); border: 1px solid var(--border); border-radius: 999px;
    padding: .2rem .7rem .2rem .2rem; margin: 0 .4rem .5rem 0; font-size: .85rem;
}
.entity-type {
    background: var(--primary-soft); color: var(--accent); border-radius: 999px;
    padding: .1rem .5rem; font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .3px;
}

/* ---- Engine picker ------------------------------------------ */
.engine-picker { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: .6rem; }
.engine-choice {
    display: flex; align-items: flex-start; gap: .6rem; cursor: pointer; margin: 0;
    border: 1px solid var(--border); border-radius: 12px; padding: .7rem .8rem; background: var(--bg-elev);
    transition: border-color .15s ease, background .15s ease;
}
.engine-choice:hover { border-color: var(--primary); }
.engine-choice input { margin-top: .25rem; accent-color: var(--primary); width: 1rem; height: 1rem; flex: 0 0 auto; }
.engine-choice:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); }
.engine-choice-body { display: flex; flex-direction: column; gap: .15rem; }
.engine-choice-name { font-weight: 700; font-size: .92rem; }
.engine-choice-desc { color: var(--text-muted); font-size: .78rem; line-height: 1.35; }

/* ---- Landing page ------------------------------------------- */
.hero { padding: 5rem 0 3rem; text-align: center; position: relative; }
.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    font-weight: 800; letter-spacing: -1.5px; line-height: 1.05; margin-bottom: 1rem;
}
.gradient-text {
    background: linear-gradient(120deg, var(--primary), var(--accent));
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p.lead { color: var(--text-muted); font-size: 1.2rem; max-width: 760px; margin: 0 auto 2rem; }
.hero-glow { position: absolute; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.hero-glow::before {
    content: ""; position: absolute; top: -20%; left: 50%; transform: translateX(-50%);
    width: 700px; height: 700px; border-radius: 50%;
    background: radial-gradient(circle, var(--primary-soft), transparent 60%);
}
.feature-card { height: 100%; padding: 1.5rem; }
.feature-card .icon {
    width: 44px; height: 44px; display: grid; place-items: center;
    border-radius: 12px; background: var(--primary-soft); font-size: 1.4rem; margin-bottom: 1rem;
}
.section { padding: 3.5rem 0; }
.section h2 { font-weight: 800; letter-spacing: -.5px; margin-bottom: .5rem; }
.step-num {
    width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center;
    background: var(--primary); color: #fff; font-weight: 700; flex: 0 0 auto;
}

/* ---- Captcha & OTP ------------------------------------------ */
.captcha-box { display: flex; align-items: center; gap: .75rem; }
.captcha-box img { border-radius: 10px; border: 1px solid var(--border); }
.otp-display {
    font-family: ui-monospace, monospace; font-size: 2rem; font-weight: 800;
    letter-spacing: .5rem; color: var(--accent);
}

/* ---- Theme toggle ------------------------------------------- */
.theme-toggle {
    border: 1px solid var(--border); background: var(--bg-elev-2); color: var(--text);
    width: 38px; height: 38px; border-radius: 10px; cursor: pointer; font-size: 1.05rem;
    display: grid; place-items: center;
}
.theme-toggle:hover { border-color: var(--primary); }

/* ---- Footer -------------------------------------------------- */
.footer { border-top: 1px solid var(--border); color: var(--text-muted); padding: 1.5rem 0; margin-top: 3rem; }

.alert-danger { background: rgba(248,113,113,.12); border-color: var(--danger); color: var(--danger); }
.alert-info { background: var(--primary-soft); border-color: var(--primary); color: var(--text); }
.alert-warning { background: rgba(251,191,36,.12); border-color: var(--warning); color: var(--text); }
.alert-success { background: rgba(52,211,153,.12); border-color: var(--success); color: var(--text); }