/* ── Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600&family=Syne:wght@400;600;800&family=Inter:wght@400;500&display=swap');

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

:root {
  --bg:        #0d0f14;
  --bg2:       #13161e;
  --bg3:       #1a1d27;
  --border:    rgba(255,255,255,0.07);
  --border2:   rgba(255,255,255,0.13);
  --text:      #e8eaf0;
  --muted:     #6b7080;
  --accent:    #4fffb0;
  --accent2:   #00c9ff;
  --danger:    #ff4f6b;
  --warning:   #ffb340;
  --success:   #4fffb0;
  --mono:      'JetBrains Mono', monospace;
  --sans:      'Syne', sans-serif;
  --body:      'Inter', sans-serif;
  --radius:    10px;
  --radius-lg: 16px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Header ── */
header {
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
  padding: 1.5rem 2rem;
}
.header-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
}
.logo-icon { font-size: 20px; }
.logo-accent { color: var(--accent); }
.header-sub {
  font-size: 13px;
  color: var(--muted);
  border-left: 1px solid var(--border2);
  padding-left: 2rem;
}

/* ── Main ── */
main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem;
}

/* ── Tabs ── */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 2rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 5px;
}
.tab {
  flex: 1;
  padding: 10px 16px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.3px;
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
}
.tab:hover { color: var(--text); background: var(--bg3); }
.tab.active {
  background: var(--accent);
  color: #0d0f14;
}

/* ── Panels ── */
.panel { display: none; }
.panel.active { display: block; }

/* ── Cards ── */
.panel-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}
.panel-card h2 {
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
}

.vulnerable { border-color: rgba(255,79,107,0.25); }
.secure     { border-color: rgba(79,255,176,0.25); }

.card-tag {
  display: inline-block;
  font-size: 11px;
  font-family: var(--mono);
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.card-tag.danger  { background: rgba(255,79,107,0.15); color: var(--danger); border: 1px solid rgba(255,79,107,0.3); }
.card-tag.success { background: rgba(79,255,176,0.12); color: var(--success); border: 1px solid rgba(79,255,176,0.25); }

/* ── Code blocks ── */
pre {
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  overflow-x: auto;
  margin-bottom: 1rem;
  color: #c9d1e0;
}
.kw  { color: #c792ea; }
.fn  { color: #82aaff; }
.val { color: #f78c6c; }
.cm  { color: #546e7a; font-style: italic; }

.explain {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}
.explain em { color: var(--warning); font-style: normal; }

/* ── Two-col layout ── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}
@media (max-width: 680px) { .two-col { grid-template-columns: 1fr; } }

/* ── Flow section ── */
.flow-section {
  margin-bottom: 1.5rem;
}
.flow-section h3 {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1rem;
}
.flow {
  display: flex;
  align-items: stretch;
  gap: 0;
  flex-wrap: wrap;
}
.flow-step {
  flex: 1;
  min-width: 160px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.flow-step.highlight {
  border-color: rgba(79,255,176,0.3);
  background: rgba(79,255,176,0.05);
}
.step-num {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 4px;
}
.step-body strong {
  display: block;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}
.step-body span {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}
.flow-arrow {
  display: flex;
  align-items: center;
  padding: 0 8px;
  color: var(--muted);
  font-size: 18px;
  flex-shrink: 0;
}

/* ── Buttons ── */
.btn-primary {
  background: var(--accent);
  color: #0d0f14;
  border: none;
  border-radius: var(--radius);
  padding: 10px 22px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}
.btn-primary:hover { opacity: 0.9; }
.btn-primary:active { transform: scale(0.98); }
.btn-primary.big { padding: 13px 32px; font-size: 15px; }

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 10px 22px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-secondary:hover { background: var(--bg3); }

.btn-sm {
  background: var(--bg3);
  color: var(--muted);
  border: 1px solid var(--border2);
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 12px;
  font-family: var(--mono);
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.btn-sm:hover { color: var(--text); background: var(--bg2); }

.cta-row, .action-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 1.5rem;
}

/* ── Form elements ── */
label {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.hint {
  font-weight: 400;
  color: var(--muted);
  text-transform: none;
  letter-spacing: 0;
  font-family: var(--body);
}

input[type=text] {
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 9px 14px;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--text);
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}
input[type=text]:focus { border-color: var(--accent); }

input[type=range] {
  width: 100%;
  accent-color: var(--accent);
  height: 4px;
  cursor: pointer;
}
.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
  font-family: var(--mono);
}

.field-group { margin-bottom: 1.25rem; }
.field-group:last-child { margin-bottom: 0; }

/* ── Demo grid ── */
.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 680px) { .demo-grid { grid-template-columns: 1fr; } }

.secret-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.secret-mask {
  font-family: var(--mono);
  font-size: 20px;
  letter-spacing: 4px;
  color: var(--muted);
  flex: 1;
  min-width: 120px;
}

.input-row {
  display: flex;
  gap: 8px;
}
.input-row input { flex: 1; }

.result-box {
  margin-top: 10px;
  min-height: 36px;
  font-family: var(--mono);
  font-size: 13px;
}

/* ── Log ── */
.log-card { padding-bottom: 0; }
.log-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.log {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 10px 14px;
  max-height: 240px;
  overflow-y: auto;
  font-family: var(--mono);
  font-size: 12px;
  border: 1px solid var(--border);
  margin: 0 -1.5rem;
  margin-top: 0;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  border-left: none;
  border-right: none;
  border-bottom: none;
}
.log-line {
  padding: 3px 0;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  line-height: 1.5;
}
.log-line:last-child { border-bottom: none; }
.log-line.hit  { color: var(--success); }
.log-line.miss { color: var(--danger); }
.log-line.info { color: var(--accent2); }

/* ── Stats ── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 1.25rem;
}
@media (max-width: 600px) { .stats-row { grid-template-columns: repeat(2, 1fr); } }

.stat-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}
.stat-val {
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 600;
  color: var(--text);
  line-height: 1;
  margin-bottom: 4px;
}
.stat-lbl {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── Crack display ── */
.cracked-card { text-align: center; padding: 2rem; }
.cracked-card label { text-align: center; margin-bottom: 12px; }
.crack-display {
  font-family: var(--mono);
  font-size: 36px;
  font-weight: 600;
  letter-spacing: 10px;
  color: var(--muted);
  transition: color 0.3s;
}
.crack-display.done { color: var(--success); }

/* ── Progress bars ── */
.bars-container { margin-bottom: 1.25rem; }
.bar-section { margin-bottom: 1rem; }
.bar-section-title {
  font-size: 11px;
  font-family: var(--mono);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.bar-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 3px;
}
.bar-char {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  min-width: 22px;
  text-align: right;
}
.bar-wrap {
  flex: 1;
  background: var(--bg3);
  border-radius: 4px;
  height: 16px;
  overflow: hidden;
  position: relative;
}
.bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.4s ease;
}
.bar-time {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 10px;
  color: #0d0f14;
  font-family: var(--mono);
  font-weight: 600;
}

/* ── Badge ── */
.badge {
  display: inline-block;
  font-size: 12px;
  font-family: var(--mono);
  padding: 3px 10px;
  border-radius: 4px;
}
.badge-success { background: rgba(79,255,176,0.12); color: var(--success); }
.badge-danger  { background: rgba(255,79,107,0.12); color: var(--danger); }

/* ── Footer ── */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 99px; }