@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg:       #f0f6ff;
  --bg2:      #e4eefb;
  --bg3:      #d6e5f8;
  --card:     #ffffff;
  --card2:    #f5f9ff;
  --border:   #c2d8f5;
  --border2:  #93bce9;
  --accent:   #1a6fd4;
  --accent2:  #1558b0;
  --accent3:  #2980d9;
  --accent-light: rgba(26,111,212,0.09);
  --accent-glow:  rgba(26,111,212,0.18);
  --cyan:     #0284c7;
  --cyan-dim: rgba(2,132,199,0.1);
  --text:     #0f1f3d;
  --text2:    #2e4a6e;
  --text3:    #5a7a9e;
  --success:  #059669;
  --warning:  #d97706;
  --danger:   #dc2626;
  --mono:  'JetBrains Mono', monospace;
  --sans:  'Inter', sans-serif;
  --radius:    12px;
  --radius-sm: 8px;
  --shadow:    0 2px 12px rgba(26,111,212,0.07);
  --shadow-lg: 0 6px 32px rgba(26,111,212,0.13);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
  line-height: 1.6;
  background-image: radial-gradient(ellipse 80% 40% at 50% -10%, rgba(26,111,212,0.06) 0%, transparent 60%);
}

/* ── Nav ── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  box-shadow: 0 1px 6px rgba(26,111,212,0.05);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; gap: 0.25rem; height: 56px;
}
.nav-logo {
  font-family: var(--mono); font-weight: 700; font-size: 1rem;
  color: var(--accent2); text-decoration: none; white-space: nowrap;
  letter-spacing: -0.5px; flex-shrink: 0; margin-right: 0.75rem;
}
.nav-logo span { color: var(--cyan); }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--border);
  color: var(--text2); cursor: pointer; padding: 4px 8px;
  border-radius: 6px; margin-left: auto; font-size: 1rem;
}
.nav-links {
  display: flex; align-items: center; gap: 0; flex: 1;
}
.nav-links > a {
  color: var(--text2); text-decoration: none; font-size: 0.8rem; font-weight: 500;
  padding: 5px 8px; border-radius: 6px; transition: all 0.13s; white-space: nowrap;
}
.nav-links > a:hover, .nav-links > a.active {
  color: var(--accent); background: var(--accent-light);
}
.nav-dropdown { position: relative; }
.nav-dropdown > a {
  color: var(--text2); text-decoration: none; font-size: 0.8rem; font-weight: 500;
  padding: 5px 8px; border-radius: 6px; transition: all 0.13s; white-space: nowrap;
  cursor: pointer; display: block;
}
.nav-dropdown > a:hover { color: var(--accent); background: var(--accent-light); }
.nav-dropdown-menu {
  display: none; position: absolute; top: 100%; left: 0;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 0.35rem; padding-top: 0.55rem; min-width: 175px;
  box-shadow: var(--shadow-lg); z-index: 9999;
  /* Invisible bridge above menu prevents gap-triggered mouseleave */
  margin-top: 0;
}
/* Pseudo-element bridge fills the gap between toggle and menu */
.nav-dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  height: 8px;
  background: transparent;
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
  display: block; padding: 7px 11px; font-size: 0.81rem;
  color: var(--text2); text-decoration: none; border-radius: 6px; transition: all 0.12s;
}
.nav-dropdown-menu a:hover { background: var(--accent-light); color: var(--accent); }

/* ── Main ── */
main { max-width: 900px; margin: 0 auto; padding: 2.5rem 1.5rem 5rem; }

/* ── Cards ── */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.6rem;
  margin-bottom: 1.2rem; box-shadow: var(--shadow);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.card:hover { border-color: var(--border2); }
.card-glow { box-shadow: var(--shadow), 0 0 0 2px rgba(26,111,212,0.07); }

/* ── Page header ── */
.page-header { margin-bottom: 1.75rem; }
.page-header h1 {
  font-family: var(--mono); font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700; color: var(--accent2); letter-spacing: -1px; line-height: 1.2;
}
.page-header h1 span { color: var(--cyan); }
.page-header p { color: var(--text2); margin-top: 0.4rem; font-size: 0.93rem; }

/* ── Section title ── */
.section-title {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--accent3); margin-bottom: 0.7rem;
}

/* ── Info box ── */
.info-box {
  background: rgba(26,111,212,0.05); border: 1px solid rgba(26,111,212,0.16);
  border-radius: var(--radius-sm); padding: 0.9rem 1.15rem;
  margin-bottom: 1.2rem; font-size: 0.87rem; color: var(--text2); line-height: 1.65;
}
.info-box strong { color: var(--accent2); }
.info-box code {
  font-family: var(--mono); background: rgba(26,111,212,0.08);
  padding: 1px 5px; border-radius: 4px; font-size: 0.85em; color: var(--accent);
}
.info-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.55rem; margin-top: 0.7rem;
}
.info-item {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 0.6rem 0.85rem;
}
.info-item .label { font-size: 0.67rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text3); font-weight: 600; }
.info-item .value { font-family: var(--mono); font-size: 0.87rem; color: var(--accent2); margin-top: 2px; font-weight: 600; }

/* ── Forms ── */
label { display: block; font-size: 0.79rem; font-weight: 600; color: var(--text2); margin-bottom: 0.38rem; }
input[type="text"], input[type="number"], textarea, select {
  width: 100%; background: #fff; border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text); font-family: var(--sans);
  font-size: 0.91rem; padding: 0.58rem 0.85rem; outline: none;
  transition: border-color 0.13s, box-shadow 0.13s;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
textarea { resize: vertical; min-height: 90px; font-family: var(--mono); font-size: 0.84rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; margin-bottom: 1rem; }
@media (max-width: 580px) { .form-row { grid-template-columns: 1fr; } }
.form-group { margin-bottom: 0.95rem; }

/* ── Toggle ── */
.toggle-row { display: flex; align-items: center; gap: 0.55rem; margin-bottom: 0.8rem; cursor: pointer; }
.toggle-row input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent); flex-shrink: 0; }
.toggle-row span { font-size: 0.84rem; color: var(--text2); }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 0.42rem;
  font-family: var(--sans); font-weight: 600; font-size: 0.87rem;
  padding: 0.57rem 1.25rem; border-radius: var(--radius-sm);
  border: none; cursor: pointer; transition: all 0.14s;
  text-decoration: none; white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 2px 8px rgba(26,111,212,0.28); }
.btn-primary:hover { background: var(--accent2); box-shadow: 0 4px 14px rgba(26,111,212,0.38); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary { background: var(--bg2); color: var(--text2); border: 1.5px solid var(--border); }
.btn-secondary:hover { background: var(--bg3); color: var(--accent2); border-color: var(--accent); }
.btn-danger { background: rgba(220,38,38,0.07); color: var(--danger); border: 1.5px solid rgba(220,38,38,0.22); }
.btn-danger:hover { background: rgba(220,38,38,0.13); }
.btn-group { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 1rem; }

/* ── Drop zone ── */
.drop-zone {
  border: 2px dashed var(--border2); border-radius: var(--radius);
  padding: 1.75rem; text-align: center; cursor: pointer;
  transition: all 0.14s; background: var(--bg2);
}
.drop-zone:hover, .drop-zone.drag-over { border-color: var(--accent); background: var(--accent-light); }
.drop-zone .drop-icon { font-size: 1.8rem; margin-bottom: 0.4rem; }
.drop-zone p { color: var(--text2); font-size: 0.87rem; }
.drop-zone input[type="file"] { display: none; }

/* ── Results ── */
.result-box { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.95rem 1.15rem; margin-top: 1.15rem; }
.result-label { font-size: 0.67rem; text-transform: uppercase; letter-spacing: 1.5px; color: var(--text3); font-weight: 700; margin-bottom: 0.38rem; }

.copy-btn {
  display: inline-flex; align-items: center; gap: 0.3rem;
  font-size: 0.73rem; color: var(--text3); background: #fff;
  border: 1px solid var(--border); border-radius: 5px; padding: 3px 9px;
  cursor: pointer; margin-top: 0.45rem; transition: all 0.12s; font-family: var(--sans);
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-light); }

/* ── Tabs ── */
.tabs { display: flex; gap: 0.15rem; border-bottom: 2px solid var(--border); margin-bottom: 1.15rem; }
.tab-btn {
  font-family: var(--sans); font-size: 0.81rem; font-weight: 600; padding: 0.48rem 0.95rem;
  background: none; border: none; color: var(--text3); cursor: pointer;
  border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all 0.13s;
}
.tab-btn:hover { color: var(--text2); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Stats ── */
.stat-row { display: flex; gap: 0.65rem; flex-wrap: wrap; margin: 0.9rem 0; }
.stat {
  flex: 1; min-width: 100px; background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 0.65rem 0.85rem; text-align: center;
}
.stat .stat-val { font-family: var(--mono); font-size: 1.15rem; font-weight: 700; color: var(--accent); }
.stat .stat-lbl { font-size: 0.67rem; color: var(--text3); text-transform: uppercase; letter-spacing: 1px; margin-top: 1px; }

/* ── Progress bar ── */
.progress-bar { height: 5px; background: var(--bg3); border-radius: 99px; overflow: hidden; margin: 0.65rem 0; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--cyan)); border-radius: 99px; transition: width 0.3s; }

/* ── Badges ── */
.badge { display: inline-block; font-size: 0.67rem; font-weight: 700; padding: 2px 7px; border-radius: 99px; letter-spacing: 0.5px; text-transform: uppercase; }
.badge-blue   { background: rgba(26,111,212,0.11); color: var(--accent2); }
.badge-green  { background: rgba(5,150,105,0.11);  color: var(--success); }
.badge-red    { background: rgba(220,38,38,0.11);  color: var(--danger); }
.badge-orange { background: rgba(217,119,6,0.11);  color: var(--warning); }

/* ── Alerts ── */
.alert { padding: 0.78rem 1rem; border-radius: var(--radius-sm); font-size: 0.87rem; margin-top: 0.9rem; display: flex; align-items: flex-start; gap: 0.45rem; line-height: 1.55; }
.alert-success { background: rgba(5,150,105,0.07);  border: 1px solid rgba(5,150,105,0.22);  color: #065f46; }
.alert-warning { background: rgba(217,119,6,0.07);  border: 1px solid rgba(217,119,6,0.22);  color: #92400e; }
.alert-info    { background: rgba(26,111,212,0.06); border: 1px solid rgba(26,111,212,0.18); color: var(--accent2); }
.alert-danger  { background: rgba(220,38,38,0.06);  border: 1px solid rgba(220,38,38,0.18);  color: #991b1b; }

/* ── Log box ── */
.log-box {
  background: #f4f8ff; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 0.85rem; font-family: var(--mono); font-size: 0.77rem;
  max-height: 200px; overflow-y: auto; color: var(--text2); line-height: 1.6;
}
.log-box .log-success { color: var(--success); font-weight: 600; }
.log-box .log-accent  { color: var(--accent2); }
.log-box .log-cyan    { color: var(--cyan); }
.log-box .log-dim     { color: var(--text3); }

/* ── Hash display ── */
.hash-display {
  font-family: var(--mono); font-size: clamp(0.64rem, 1.3vw, 0.81rem);
  word-break: break-all; color: var(--accent); background: var(--bg2);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 0.75rem 0.95rem; line-height: 1.6; min-height: 44px;
}
.hash-display.large { font-size: clamp(0.6rem, 1vw, 0.76rem); }
.highlight-match { background: rgba(5,150,105,0.14); color: var(--success); border-radius: 3px; padding: 0 2px; font-weight: 700; }

/* ── Chips ── */
.security-chips { display: flex; gap: 0.45rem; flex-wrap: wrap; margin-top: 0.7rem; }
.chip { font-size: 0.69rem; font-family: var(--mono); padding: 2px 8px; border-radius: 99px; border: 1px solid; font-weight: 500; }
.chip-green  { border-color: var(--success); color: var(--success); background: rgba(5,150,105,0.07); }
.chip-orange { border-color: var(--warning); color: var(--warning); background: rgba(217,119,6,0.07); }
.chip-red    { border-color: var(--danger);  color: var(--danger);  background: rgba(220,38,38,0.07); }
.chip-blue   { border-color: var(--accent);  color: var(--accent);  background: rgba(26,111,212,0.07); }

/* ── Mobile ── */
@media (max-width: 820px) {
  .nav-toggle { display: flex; align-items: center; }
  .nav-links {
    display: none; position: absolute; top: 56px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--border);
    padding: 0.5rem 1rem 1rem; flex-direction: column; align-items: flex-start;
    box-shadow: 0 4px 16px rgba(26,111,212,0.1); z-index: 9999;
  }
  .nav-links.open { display: flex; }
  .nav-links > a,
  .nav-dropdown > a { width: 100%; padding: 9px 12px; font-size: 0.87rem; }
  .nav-dropdown { width: 100%; }
  .nav-dropdown-menu {
    position: static; box-shadow: none; border: none;
    background: var(--bg2); padding: 0 0 0 1rem; border-radius: 0;
  }
  .nav-dropdown-menu a { padding: 7px 12px; }
  main { padding: 1.4rem 1rem 3rem; }
}

/* ── Utilities ── */
.hidden { display: none; }
.text-mono { font-family: var(--mono); }
.text-sm   { font-size: 0.84rem; }
.text-xs   { font-size: 0.73rem; }
.text-muted  { color: var(--text2); }
.text-dim    { color: var(--text3); }
.text-success { color: var(--success); }
.text-accent  { color: var(--accent2); }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.divider { border: none; border-top: 1px solid var(--border); margin: 1.4rem 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 99px; }

/* ── Animations ── */
@keyframes spin { to { transform: rotate(360deg); } }
.spin { animation: spin 0.9s linear infinite; display: inline-block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn 0.28s ease; }
@keyframes pulse-glow { 0%,100% { opacity: 1; } 50% { opacity: 0.75; } }
.pulse { animation: pulse-glow 1.8s infinite; }