/* ═══════════════════════════════════════════════════════════════════════════
   HTML Tools — Shared Theme
   Import this in every tool page.
   ═══════════════════════════════════════════════════════════════════════════ */

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

/* ── Variables — Light (default) ──────────────────────────────────────────── */
:root {
  /* Surfaces */
  --bg:       #f4f5f7;
  --surface:  #ffffff;
  --surface2: #edf0f5;
  --border:   #dce0ea;

  /* Text */
  --text:     #1c1f2e;
  --text-dim: #8892ab;

  /* Accent palette */
  --accent:   #4361ee;
  --danger:   #e0294a;
  --success:  #1e9e50;
  --warning:  #c47f00;
  --purple:   #7b30e0;
  --cyan:     #0686a8;
  --red:      #d42020;
  --pink:     #b521c9;
  --orange:   #a85700;

  /* JWT semantic aliases */
  --header-red:     #d42020;
  --payload-purple: #7b30e0;
  --signature-cyan: #0686a8;

  --radius: 10px;
}

/* ── Variables — Dark ─────────────────────────────────────────────────────── */
[data-theme="dark"] {
  --bg:       #0c0c11;
  --surface:  #13131c;
  --surface2: #1b1b27;
  --border:   #2c2c3e;
  --text:     #e2e4f0;
  --text-dim: #5a6380;
}

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

/* ── Body ─────────────────────────────────────────────────────────────────── */
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
}

/* ── Noise overlay (very subtle on light backgrounds) ─────────────────────── */
.noise {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0.018;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── App container base ───────────────────────────────────────────────────── */
.app {
  position: relative;
  z-index: 1;
  padding: 24px 24px 80px;
}

/* ── Header ───────────────────────────────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 0 28px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}

.logo {
  width: 44px; height: 44px;
  border-radius: 12px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 13px;
  color: #fff;
  letter-spacing: -0.5px;
}

h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.5px;
}
h1 span {
  color: var(--text-dim);
  font-weight: 400;
  font-size: 14px;
  margin-left: 8px;
}

/* ── Panel ────────────────────────────────────────────────────────────────── */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.panel-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-dim);
  background: var(--surface);
}

.panel-body { padding: 0; }

/* ── Textarea ─────────────────────────────────────────────────────────────── */
textarea {
  width: 100%;
  border: none;
  background: transparent;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.7;
  padding: 16px;
  resize: vertical;
  outline: none;
  min-height: 120px;
}
textarea[readonly] {
  cursor: default;
  resize: none;
  background: var(--surface2);
  color: var(--text);
}
textarea::placeholder { color: var(--text-dim); }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  padding: 7px 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  transition: all 0.15s ease;
  letter-spacing: 0.5px;
  white-space: nowrap;
  user-select: none;
}
.btn:hover { background: var(--border); }

.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { filter: brightness(1.08); }

.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { filter: brightness(1.08); }

.btn-sm  { padding: 5px 10px; font-size: 11px; }
.btn-icon { padding: 4px 8px; font-size: 13px; line-height: 1; }

.btn-remove {
  color: var(--danger);
  border-color: transparent;
  background: transparent;
}
.btn-remove:hover {
  background: rgba(224, 41, 74, 0.08);
  border-color: var(--danger);
}

/* ── Form controls ────────────────────────────────────────────────────────── */
select,
input[type="text"] {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  padding: 8px 12px;
  border-radius: 6px;
  outline: none;
  cursor: pointer;
}
select:focus,
input[type="text"]:focus { border-color: var(--accent); }
input[type="text"] { flex: 1; min-width: 120px; cursor: text; }

/* ── Badge ────────────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.5px;
}
.badge-alg  { background: rgba(212,32,32,0.1);  color: var(--red); }
.badge-null { background: rgba(196,127,0,0.1);  color: var(--warning); }
.badge-exp  { background: rgba(224,41,74,0.1);  color: var(--danger); }
.badge-ok   { background: rgba(30,158,80,0.1);  color: var(--success); }

/* ── Info count ───────────────────────────────────────────────────────────── */
.info-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
}

/* ── Toast ────────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px; right: 24px;
  background: var(--text);
  color: var(--surface);
  padding: 10px 18px;
  border-radius: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  transform: translateY(80px);
  opacity: 0;
  transition: all 0.25s ease;
  z-index: 100;
}
.toast.show { transform: translateY(0); opacity: 1; }

/* ── Disclaimer footer bar ──────────��─────────────���────────────────────────── */
.disc-footer-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 200;
  background: rgba(15,15,19,.92); backdrop-filter: blur(6px);
  border-top: 1px solid rgba(245,158,11,.25);
  color: rgba(245,158,11,.7);
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  text-align: center; padding: 6px 24px;
  letter-spacing: .3px;
}

/* ── Theme toggle button ─────────────────────────────────────────────────── */
.theme-toggle-btn {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 6px; padding: 5px 10px;
  font-size: 14px; cursor: pointer; line-height: 1;
  transition: border-color .15s, background .15s;
  flex-shrink: 0;
}
.theme-toggle-btn:hover { border-color: var(--text-dim); background: var(--border); }

/* ── Back to index link ───────────────────────────────────────────────────── */
.back-link {
  margin-left: auto;
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  color: var(--text-dim); text-decoration: none;
  display: flex; align-items: center; gap: 5px;
  padding: 5px 10px; border-radius: 6px; border: 1px solid var(--border);
  transition: color .15s, border-color .15s;
  white-space: nowrap;
}
.back-link:hover { color: var(--text); border-color: var(--text-dim); }