:root {
  --bg:            #f6f7fb;
  --bg-grad-a:     #eef1ff;
  --bg-grad-b:     #f7f4ff;
  --panel:         #ffffff;
  --panel-2:       #fbfbfe;
  --border:        #e4e6f0;
  --text:          #14162b;
  --text-dim:      #5b607a;
  --text-faint:    #8d92ab;
  --accent:        #4f46e5;
  --accent-2:      #7c3aed;
  --shadow:        0 1px 2px rgba(20,22,43,.04), 0 12px 32px rgba(20,22,43,.07);

  --safe:     #10b981;
  --low:      #22a3d6;
  --medium:   #eab308;
  --high:     #f97316;
  --critical: #ef4444;
}

html[data-theme="dark"] {
  --bg:            #0a0b12;
  --bg-grad-a:     #131530;
  --bg-grad-b:     #1a1030;
  --panel:         #12131f;
  --panel-2:       #171827;
  --border:        #262838;
  --text:          #eceefb;
  --text-dim:      #a3a7c2;
  --text-faint:    #6f7492;
  --accent:        #7c6bff;
  --accent-2:      #a855f7;
  --shadow:        0 1px 2px rgba(0,0,0,.3), 0 16px 40px rgba(0,0,0,.4);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(900px 500px at 15% -10%, var(--bg-grad-a), transparent 60%),
    radial-gradient(800px 500px at 90% 0%, var(--bg-grad-b), transparent 55%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

svg { width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- nav ---------- */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1000px; margin: 0 auto; padding: 22px 24px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-size: 16px; font-weight: 600; }
.brand svg { width: 22px; height: 22px; color: var(--accent); fill: color-mix(in srgb, var(--accent) 16%, transparent); }
.brand b { font-weight: 700; background: linear-gradient(92deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-right { display: flex; align-items: center; gap: 18px; }
.nav-right a { color: var(--text-dim); text-decoration: none; font-size: 14px; font-weight: 500; }
.nav-right a:hover { color: var(--text); }

.icon-btn {
  width: 34px; height: 34px; padding: 7px; display: grid; place-items: center;
  border: 1px solid var(--border); border-radius: 9px; cursor: pointer;
  background: var(--panel); color: var(--text-dim);
}
.icon-btn:hover { color: var(--text); }
.icon-btn svg { width: 17px; height: 17px; }
.ico-moon { display: none; }
html[data-theme="dark"] .ico-sun { display: none; }
html[data-theme="dark"] .ico-moon { display: block; }

/* ---------- layout ---------- */
main { max-width: 1000px; margin: 0 auto; padding: 0 24px 72px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 26px;
  margin-bottom: 20px;
}

/* ---------- hero ---------- */
.hero { text-align: center; padding: 40px 0 34px; }
.pill {
  display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase; color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 20px;
}
.hero h1 { margin: 0 0 14px; font-size: clamp(30px, 5.2vw, 46px); line-height: 1.12; letter-spacing: -.025em; font-weight: 700; }
.hero p { margin: 0 auto; max-width: 520px; color: var(--text-dim); font-size: 16px; line-height: 1.6; }

/* ---------- scanner ---------- */
.field-label { display: block; font-size: 13px; font-weight: 600; color: var(--text-dim); margin-bottom: 9px; }

textarea {
  width: 100%; min-height: 190px; resize: vertical;
  padding: 15px; font: 400 14.5px/1.65 Inter, sans-serif;
  color: var(--text); background: var(--panel-2);
  border: 1px solid var(--border); border-radius: 13px;
  transition: border-color .15s, box-shadow .15s;
}
textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent); }
textarea::placeholder { color: var(--text-faint); }

.under-field { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; margin-top: 13px; }
.examples { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.examples > span { font-size: 12.5px; color: var(--text-faint); margin-right: 2px; }
.chip {
  font: 500 12.5px Inter, sans-serif; color: var(--text-dim); cursor: pointer;
  background: var(--panel-2); border: 1px solid var(--border);
  padding: 6px 11px; border-radius: 8px; transition: .15s;
}
.chip:hover { color: var(--text); border-color: var(--accent); }
.counter { font: 500 12px "JetBrains Mono", monospace; color: var(--text-faint); }

.actions { display: flex; gap: 10px; margin-top: 18px; }
.btn {
  font: 600 14.5px Inter, sans-serif; cursor: pointer; border-radius: 11px;
  padding: 12px 22px; border: 1px solid transparent; transition: .15s;
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
}
.btn.primary { flex: 1; color: #fff; background: linear-gradient(92deg, var(--accent), var(--accent-2)); }
.btn.primary:hover:not(:disabled) { filter: brightness(1.09); }
.btn.primary:disabled { opacity: .62; cursor: default; }
.btn.ghost { color: var(--text-dim); background: var(--panel-2); border-color: var(--border); }
.btn.ghost:hover { color: var(--text); }
.btn.small { padding: 8px 15px; font-size: 13px; }

.spinner { display: none; width: 15px; height: 15px; border: 2px solid rgba(255,255,255,.32); border-top-color: #fff; border-radius: 50%; animation: spin .6s linear infinite; }
.btn.loading .spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

.error { margin: 14px 0 0; padding: 11px 14px; font-size: 13.5px; color: var(--critical); background: color-mix(in srgb, var(--critical) 10%, transparent); border: 1px solid color-mix(in srgb, var(--critical) 28%, transparent); border-radius: 10px; }

/* ---------- result ---------- */
.result { animation: rise .32s cubic-bezier(.2,.7,.3,1); }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } }

.result-head { display: flex; gap: 30px; align-items: center; flex-wrap: wrap; }

.gauge { position: relative; width: 138px; height: 138px; flex-shrink: 0; }
.gauge svg { transform: rotate(-90deg); }
.gauge circle { fill: none; stroke-width: 9; }
.gauge-track { stroke: var(--border); }
.gauge-arc {
  stroke: var(--level, var(--accent)); stroke-linecap: round;
  stroke-dasharray: 326.7; stroke-dashoffset: 326.7;
  transition: stroke-dashoffset 1s cubic-bezier(.2,.8,.25,1), stroke .4s;
}
.gauge-center { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; line-height: 1; }
.gauge-center span { font: 700 38px "JetBrains Mono", monospace; color: var(--level, var(--text)); }
.gauge-center small { display: block; margin-top: 4px; font-size: 11.5px; color: var(--text-faint); }

.result-meta { flex: 1; min-width: 250px; }
.badge {
  display: inline-block; font-size: 11.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: var(--level); background: color-mix(in srgb, var(--level) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--level) 34%, transparent);
  padding: 4px 11px; border-radius: 7px; margin-bottom: 11px;
}
.result-meta h2 { margin: 0 0 8px; font-size: 21px; letter-spacing: -.015em; }
.summary { margin: 0 0 17px; color: var(--text-dim); font-size: 14.5px; line-height: 1.65; }

.confidence { max-width: 320px; }
.conf-row { display: flex; justify-content: space-between; font-size: 12.5px; color: var(--text-faint); margin-bottom: 6px; }
.conf-track { height: 5px; background: var(--border); border-radius: 3px; overflow: hidden; }
.conf-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 3px; transition: width .8s cubic-bezier(.2,.8,.25,1); }

.findings { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--border); }
.finding-col h3 { display: flex; align-items: center; gap: 8px; margin: 0 0 13px; font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--text-faint); }
.finding-col h3 svg { width: 15px; height: 15px; }
.finding-col ul { margin: 0; padding: 0; list-style: none; }
.finding-col li { position: relative; padding: 0 0 0 17px; margin-bottom: 10px; font-size: 14px; line-height: 1.6; color: var(--text-dim); }
.finding-col li::before { content: ""; position: absolute; left: 0; top: 8px; width: 5px; height: 5px; border-radius: 50%; background: var(--level, var(--accent)); }
.finding-col li.empty { padding-left: 0; color: var(--text-faint); font-style: italic; }
.finding-col li.empty::before { display: none; }

.result-foot { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }
.disclaimer-inline { font-size: 12.5px; color: var(--text-faint); }

/* ---------- history ---------- */
.history-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.history-head h3 { margin: 0; font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--text-faint); }
.linkbtn { background: none; border: none; padding: 0; cursor: pointer; font: 500 13px Inter, sans-serif; color: var(--text-faint); }
.linkbtn:hover { color: var(--text); }

.history ul { margin: 0; padding: 0; list-style: none; }
.history li {
  display: flex; align-items: center; gap: 14px; padding: 12px 13px; margin-bottom: 7px;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 11px; cursor: pointer; transition: .15s;
}
.history li:hover { border-color: var(--accent); }
.h-score { flex-shrink: 0; width: 40px; text-align: center; font: 700 15px "JetBrains Mono", monospace; color: var(--level); }
.h-body { flex: 1; min-width: 0; }
.h-text { font-size: 13.5px; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.h-meta { font-size: 11.5px; color: var(--text-faint); margin-top: 3px; }

/* ---------- how ---------- */
.how { margin: 46px 0 30px; }
.how h2 { margin: 0 0 22px; font-size: 22px; letter-spacing: -.015em; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 0; padding: 0; list-style: none; counter-reset: none; }
.steps li { background: var(--panel); border: 1px solid var(--border); border-radius: 15px; padding: 22px; }
.step-n { display: grid; place-items: center; width: 27px; height: 27px; margin-bottom: 13px; border-radius: 8px; font: 700 13px "JetBrains Mono", monospace; color: #fff; background: linear-gradient(92deg, var(--accent), var(--accent-2)); }
.steps h4 { margin: 0 0 7px; font-size: 15px; }
.steps p { margin: 0; font-size: 13.5px; line-height: 1.6; color: var(--text-dim); }

/* ---------- disclaimer ---------- */
.disclaimer { padding: 22px 24px; border-radius: 15px; background: color-mix(in srgb, var(--medium) 8%, transparent); border: 1px solid color-mix(in srgb, var(--medium) 26%, transparent); }
.disclaimer h3 { margin: 0 0 10px; font-size: 14px; color: var(--medium); }
.disclaimer p { margin: 0 0 9px; font-size: 13.5px; line-height: 1.65; color: var(--text-dim); }
.disclaimer p:last-child { margin-bottom: 0; }

footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; max-width: 1000px; margin: 0 auto; padding: 26px 24px 40px; font-size: 13px; color: var(--text-faint); border-top: 1px solid var(--border); }
footer a { color: var(--text-dim); }

@media (max-width: 720px) {
  .findings, .steps { grid-template-columns: 1fr; }
  .result-head { justify-content: center; text-align: center; }
  .result-meta { text-align: left; }
  .confidence { max-width: none; }
  .nav-right a { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ---------------------------------------------------------- password generator */

.passgen { margin-top: 22px; }

.pg-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.pg-head h3 { margin: 0; font-size: 16px; }
.pg-std {
  font-size: 11px; font-weight: 600; letter-spacing: .04em;
  padding: 3px 9px; border-radius: 999px;
  color: var(--accent); background: color-mix(in srgb, var(--accent) 11%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent);
}
.pg-lede { margin: 0 0 16px; font-size: 13.5px; line-height: 1.6; color: var(--text-dim); }

.pg-modes { display: inline-flex; gap: 4px; padding: 4px; margin-bottom: 16px;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; }
.pg-mode {
  padding: 7px 15px; font: inherit; font-size: 13px; font-weight: 500;
  color: var(--text-dim); background: none; border: 0; border-radius: 7px; cursor: pointer;
}
.pg-mode:hover { color: var(--text); }
.pg-mode.active { color: #fff; background: linear-gradient(92deg, var(--accent), var(--accent-2)); }

.pg-controls { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; margin-bottom: 14px; }
.pg-slider { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 240px;
  font-size: 13px; color: var(--text-dim); }
.pg-slider span { white-space: nowrap; }
.pg-slider b { color: var(--text); font-variant-numeric: tabular-nums; }
.pg-slider input[type="range"] { flex: 1; accent-color: var(--accent); cursor: pointer; }
.pg-check { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--text-dim); cursor: pointer; }
.pg-check input { accent-color: var(--accent); cursor: pointer; }

.pg-out {
  padding: 16px 18px; margin-bottom: 12px;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 11px;
}
.pg-out output {
  display: block; word-break: break-all; line-height: 1.55;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 16px; color: var(--text);
}

.pg-actions { display: flex; gap: 9px; margin-bottom: 18px; }
.pg-actions .btn.primary { flex: 0 0 auto; }

.pg-ent-row { display: flex; justify-content: space-between; align-items: baseline;
  font-size: 13px; color: var(--text-dim); margin-bottom: 7px; }
.pg-ent-row b { color: var(--text); font-size: 15px; font-variant-numeric: tabular-nums; }
.pg-ent-track { height: 5px; background: var(--border); border-radius: 3px; overflow: hidden; }
.pg-ent-fill { height: 100%; width: 0; border-radius: 3px; background: var(--medium);
  transition: width .5s cubic-bezier(.2,.8,.25,1), background-color .3s; }
.pg-ent-fill[data-level="weak"]        { background: var(--critical); }
.pg-ent-fill[data-level="fair"]        { background: var(--medium); }
.pg-ent-fill[data-level="strong"]      { background: var(--safe); }
.pg-ent-fill[data-level="very-strong"] { background: var(--safe); }
.pg-ent-fill[data-level="excessive"]   { background: var(--low); }

.pg-math { margin: 10px 0 4px; font-size: 12px; color: var(--text-faint);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.pg-note { margin: 0; font-size: 13px; color: var(--text-dim); line-height: 1.55; }

.pg-why { margin-top: 18px; border-top: 1px solid var(--border); padding-top: 14px; }
.pg-why summary { cursor: pointer; font-size: 13px; font-weight: 600; color: var(--text-dim); }
.pg-why summary:hover { color: var(--text); }
.pg-why p { margin: 12px 0 0; font-size: 13px; line-height: 1.65; color: var(--text-dim); }
.pg-why code { padding: 1px 5px; border-radius: 4px; font-size: 12px;
  background: var(--panel-2); border: 1px solid var(--border); }
.pg-gap { padding-top: 12px; border-top: 1px dashed var(--border); }

@media (max-width: 560px) {
  .pg-controls { gap: 12px; }
  .pg-slider { min-width: 100%; }
  .pg-out output { font-size: 14px; }
}