/* ═══════════════════════════════════════════════════════════════════
   jwt-tool.css  -  JWT Decoder  |  Scoped under #jwtd-root
   Theme: Deep Space × Indigo/Violet Accent - Premium SaaS UI
   Prefix: jwtd-  (no bleed, cannot affect other tools)
═══════════════════════════════════════════════════════════════════ */

/* ── Design Tokens ─────────────────────────────────────────────── */
#jwtd-root {
  --jwtd-bg:           #09091a;
  --jwtd-surface:      #0f1126;
  --jwtd-surface2:     #161930;
  --jwtd-surface3:     #1e2240;
  --jwtd-border:       #252a4a;
  --jwtd-border2:      #2e3560;

  --jwtd-accent:       #6366f1;
  --jwtd-accent-soft:  rgba(99, 102, 241, 0.14);
  --jwtd-accent2:      #818cf8;
  --jwtd-accent3:      #a5b4fc;
  --jwtd-glow:         rgba(99, 102, 241, 0.4);
  --jwtd-glow-soft:    rgba(99, 102, 241, 0.12);

  /* JWT part colours - matching jwt.io spirit */
  --jwtd-header-col:   #f472b6;   /* pink  */
  --jwtd-payload-col:  #fb923c;   /* amber */
  --jwtd-sig-col:      #60a5fa;   /* blue  */

  --jwtd-ok:           #34d399;
  --jwtd-ok-bg:        rgba(52, 211, 153, 0.12);
  --jwtd-err:          #f87171;
  --jwtd-err-bg:       rgba(248, 113, 113, 0.12);
  --jwtd-warn:         #fbbf24;
  --jwtd-warn-bg:      rgba(251, 191, 36, 0.12);

  --jwtd-text:         #e2e5f5;
  --jwtd-muted:        #7b82ab;
  --jwtd-faint:        #363d6a;

  --jwtd-radius:       16px;
  --jwtd-radius-sm:    10px;
  --jwtd-radius-xs:    6px;
  --jwtd-font:         'DM Sans', 'Inter', system-ui, sans-serif;
  --jwtd-mono:         'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --jwtd-shadow:       0 4px 32px rgba(0, 0, 0, 0.5);
  --jwtd-shadow-sm:    0 2px 12px rgba(0, 0, 0, 0.35);
  --jwtd-shadow-card:  0 0 0 1px var(--jwtd-border), 0 4px 24px rgba(0,0,0,0.4);

  font-family: var(--jwtd-font);
  background: var(--jwtd-bg);
  color: var(--jwtd-text);
  min-height: 100vh;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

#jwtd-root *,
#jwtd-root *::before,
#jwtd-root *::after {
  box-sizing: inherit;
}

/* ── Hero ──────────────────────────────────────────────────────── */
.jwtd-hero {
  text-align: center;
  padding: 60px 24px 44px;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(99,102,241,0.18) 0%, transparent 70%),
    var(--jwtd-bg);
  border-bottom: 1px solid var(--jwtd-border);
  position: relative;
  overflow: hidden;
}

.jwtd-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 15% 60%, rgba(99,102,241,0.07) 0%, transparent 50%),
    radial-gradient(circle at 85% 20%, rgba(167,139,250,0.06) 0%, transparent 45%);
  pointer-events: none;
}

.jwtd-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--jwtd-accent-soft);
  border: 1px solid rgba(99,102,241,0.3);
  color: var(--jwtd-accent3);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 99px;
  margin-bottom: 22px;
}

.jwtd-hero-badge svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.jwtd-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.1;
  margin: 0 0 14px;
  color: var(--jwtd-text);
}

.jwtd-hero h1 span {
  background: linear-gradient(135deg, var(--jwtd-accent2) 0%, var(--jwtd-accent3) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.jwtd-hero p {
  max-width: 580px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--jwtd-muted);
}

/* ── App Container ─────────────────────────────────────────────── */
.jwtd-app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

/* ── Status Bar ────────────────────────────────────────────────── */
.jwtd-status-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  background: var(--jwtd-surface);
  border: 1px solid var(--jwtd-border);
  border-radius: var(--jwtd-radius-sm);
  padding: 12px 18px;
  margin-bottom: 24px;
  min-height: 52px;
  transition: border-color .2s;
}

.jwtd-status-bar.is-hidden { display: none; }

.jwtd-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 99px;
  letter-spacing: .02em;
}

.jwtd-status-pill svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.jwtd-status-pill.is-valid {
  background: var(--jwtd-ok-bg);
  color: var(--jwtd-ok);
  border: 1px solid rgba(52,211,153,.3);
}

.jwtd-status-pill.is-invalid {
  background: var(--jwtd-err-bg);
  color: var(--jwtd-err);
  border: 1px solid rgba(248,113,113,.3);
}

.jwtd-exp-info {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--jwtd-muted);
}

.jwtd-exp-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 99px;
  letter-spacing: .03em;
}

.jwtd-exp-badge.is-expired {
  background: var(--jwtd-err-bg);
  color: var(--jwtd-err);
  border: 1px solid rgba(248,113,113,.25);
}

.jwtd-exp-badge.is-valid {
  background: var(--jwtd-ok-bg);
  color: var(--jwtd-ok);
  border: 1px solid rgba(52,211,153,.25);
}

.jwtd-exp-badge.is-warn {
  background: var(--jwtd-warn-bg);
  color: var(--jwtd-warn);
  border: 1px solid rgba(251,191,36,.25);
}

/* ── Layout Grid ───────────────────────────────────────────────── */
.jwtd-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

/* ── Card Base ─────────────────────────────────────────────────── */
.jwtd-card {
  background: var(--jwtd-surface);
  border: 1px solid var(--jwtd-border);
  border-radius: var(--jwtd-radius);
  overflow: hidden;
  box-shadow: var(--jwtd-shadow-sm);
}

.jwtd-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--jwtd-border);
  background: var(--jwtd-surface2);
}

.jwtd-card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.jwtd-card-title svg {
  width: 16px;
  height: 16px;
}

.jwtd-card-title.is-header { color: var(--jwtd-header-col); }
.jwtd-card-title.is-payload { color: var(--jwtd-payload-col); }
.jwtd-card-title.is-sig    { color: var(--jwtd-sig-col); }
.jwtd-card-title.is-input  { color: var(--jwtd-accent2); }

/* ── Input Panel ───────────────────────────────────────────────── */
.jwtd-input-panel {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.jwtd-input-panel .jwtd-card-body {
  padding: 0;
}

.jwtd-token-wrap {
  position: relative;
}

#jwtd-token-input {
  width: 100%;
  min-height: 200px;
  padding: 18px;
  background: transparent;
  border: none;
  outline: none;
  resize: vertical;
  font-family: var(--jwtd-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--jwtd-text);
  caret-color: var(--jwtd-accent2);
  word-break: break-all;
  white-space: pre-wrap;
}

#jwtd-token-input::placeholder {
  color: var(--jwtd-faint);
  font-family: var(--jwtd-font);
  font-size: 14px;
}

/* Coloured token preview bar */
.jwtd-token-parts {
  display: flex;
  gap: 0;
  padding: 0 18px 14px;
  font-family: var(--jwtd-mono);
  font-size: 12.5px;
  word-break: break-all;
  line-height: 1.6;
}

.jwtd-token-parts.is-hidden { display: none; }

.jwtd-token-part { transition: opacity .2s; }
.jwtd-token-part.is-header  { color: var(--jwtd-header-col); }
.jwtd-token-part.is-dot     { color: var(--jwtd-faint); margin: 0 1px; }
.jwtd-token-part.is-payload { color: var(--jwtd-payload-col); }
.jwtd-token-part.is-sig     { color: var(--jwtd-sig-col); }

/* ── Action Buttons ────────────────────────────────────────────── */
.jwtd-actions {
  display: flex;
  gap: 10px;
  padding: 14px 18px;
  border-top: 1px solid var(--jwtd-border);
  background: var(--jwtd-surface2);
  flex-wrap: wrap;
}

.jwtd-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: var(--jwtd-radius-sm);
  font-family: var(--jwtd-font);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  outline: none;
  transition: all .18s ease;
  white-space: nowrap;
  text-decoration: none;
}

.jwtd-btn svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.jwtd-btn-primary {
  background: linear-gradient(135deg, var(--jwtd-accent) 0%, #7c3aed 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99,102,241,0.35);
}

.jwtd-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99,102,241,0.5);
}

.jwtd-btn-primary:active { transform: translateY(0); }

.jwtd-btn-outline {
  background: var(--jwtd-surface3);
  color: var(--jwtd-muted);
  border: 1px solid var(--jwtd-border2);
}

.jwtd-btn-outline:hover {
  background: var(--jwtd-border);
  color: var(--jwtd-text);
  border-color: var(--jwtd-accent);
}

.jwtd-btn-danger {
  background: rgba(248,113,113,0.1);
  color: var(--jwtd-err);
  border: 1px solid rgba(248,113,113,0.25);
}

.jwtd-btn-danger:hover {
  background: rgba(248,113,113,0.2);
  border-color: rgba(248,113,113,0.5);
}

/* ── Output Panels Column ──────────────────────────────────────── */
.jwtd-output-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.jwtd-card-body {
  padding: 0;
}

/* ── JSON Output ───────────────────────────────────────────────── */
.jwtd-json-out {
  font-family: var(--jwtd-mono);
  font-size: 12.5px;
  line-height: 1.75;
  padding: 16px 18px;
  min-height: 80px;
  max-height: 340px;
  overflow-y: auto;
  overflow-x: hidden;
  word-break: break-all;
  white-space: pre-wrap;
  color: var(--jwtd-muted);
}

.jwtd-json-out::-webkit-scrollbar { width: 5px; }
.jwtd-json-out::-webkit-scrollbar-track { background: transparent; }
.jwtd-json-out::-webkit-scrollbar-thumb {
  background: var(--jwtd-border2);
  border-radius: 99px;
}

.jwtd-json-empty {
  color: var(--jwtd-faint);
  font-family: var(--jwtd-font);
  font-size: 13px;
  font-style: italic;
}

/* Syntax highlighting colours */
.jwtd-syn-key    { color: var(--jwtd-accent3); }
.jwtd-syn-str    { color: #86efac; }
.jwtd-syn-num    { color: #c084fc; }
.jwtd-syn-bool   { color: #fbbf24; }
.jwtd-syn-null   { color: var(--jwtd-muted); }
.jwtd-syn-brace  { color: var(--jwtd-text); font-weight: 600; }

/* Signature output */
.jwtd-sig-out {
  font-family: var(--jwtd-mono);
  font-size: 12px;
  line-height: 1.7;
  padding: 16px 18px;
  color: var(--jwtd-sig-col);
  word-break: break-all;
  white-space: pre-wrap;
  min-height: 60px;
  opacity: .9;
}

/* Card footer copy bar */
.jwtd-card-footer {
  border-top: 1px solid var(--jwtd-border);
  padding: 10px 14px;
  background: var(--jwtd-surface2);
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.jwtd-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--jwtd-border2);
  color: var(--jwtd-muted);
  font-family: var(--jwtd-font);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--jwtd-radius-xs);
  cursor: pointer;
  transition: all .18s ease;
}

.jwtd-copy-btn svg {
  width: 13px;
  height: 13px;
}

.jwtd-copy-btn:hover {
  background: var(--jwtd-accent-soft);
  color: var(--jwtd-accent2);
  border-color: var(--jwtd-accent);
}

.jwtd-copy-btn.is-copied {
  color: var(--jwtd-ok);
  border-color: rgba(52,211,153,.4);
  background: var(--jwtd-ok-bg);
}

/* ── Error Banner ──────────────────────────────────────────────── */
.jwtd-error-banner {
  display: none;
  align-items: center;
  gap: 10px;
  background: var(--jwtd-err-bg);
  border: 1px solid rgba(248,113,113,.3);
  border-radius: var(--jwtd-radius-sm);
  padding: 12px 16px;
  margin-bottom: 20px;
  color: var(--jwtd-err);
  font-size: 13.5px;
  font-weight: 500;
}

.jwtd-error-banner.is-visible { display: flex; }

.jwtd-error-banner svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

/* ── Sample Tokens ─────────────────────────────────────────────── */
.jwtd-samples {
  margin-bottom: 24px;
}

.jwtd-samples-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--jwtd-muted);
  margin-bottom: 10px;
}

.jwtd-samples-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.jwtd-sample-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border-radius: 99px;
  background: var(--jwtd-surface2);
  border: 1px solid var(--jwtd-border2);
  color: var(--jwtd-muted);
  font-family: var(--jwtd-font);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all .18s ease;
}

.jwtd-sample-btn:hover {
  background: var(--jwtd-accent-soft);
  color: var(--jwtd-accent2);
  border-color: var(--jwtd-accent);
}

/* ── SEO / Info Section ────────────────────────────────────────── */
.jwtd-info-section {
  max-width: 960px;
  margin: 60px auto 0;
  padding: 0 20px;
}

.jwtd-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}

.jwtd-info-card {
  background: var(--jwtd-surface);
  border: 1px solid var(--jwtd-border);
  border-radius: var(--jwtd-radius);
  padding: 24px;
}

.jwtd-info-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--jwtd-accent-soft);
  border: 1px solid rgba(99,102,241,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.jwtd-info-icon svg {
  width: 20px;
  height: 20px;
  color: var(--jwtd-accent2);
}

.jwtd-info-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--jwtd-text);
  margin: 0 0 8px;
}

.jwtd-info-card p {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--jwtd-muted);
  margin: 0;
}

/* ── FAQ ───────────────────────────────────────────────────────── */
.jwtd-faq-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--jwtd-text);
  margin: 0 0 24px;
  text-align: center;
}

.jwtd-faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.jwtd-faq-item {
  background: var(--jwtd-surface);
  border: 1px solid var(--jwtd-border);
  border-radius: var(--jwtd-radius-sm);
  overflow: hidden;
  transition: border-color .2s;
}

.jwtd-faq-item.is-open {
  border-color: var(--jwtd-border2);
}

.jwtd-faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--jwtd-font);
  font-size: 14.5px;
  font-weight: 600;
  color: var(--jwtd-text);
  text-align: left;
  gap: 12px;
  transition: background .15s;
}

.jwtd-faq-q:hover { background: var(--jwtd-surface2); }

.jwtd-faq-chevron {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--jwtd-muted);
  transition: transform .25s cubic-bezier(.4,0,.2,1);
}

.jwtd-faq-item.is-open .jwtd-faq-chevron {
  transform: rotate(180deg);
  color: var(--jwtd-accent2);
}

.jwtd-faq-a {
  display: none;
  padding: 4px 20px 18px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--jwtd-muted);
  border-top: 1px solid var(--jwtd-border);
}

.jwtd-faq-item.is-open .jwtd-faq-a { display: block; }

/* ── Toast ─────────────────────────────────────────────────────── */
.jwtd-toast {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background: var(--jwtd-surface2);
  border: 1px solid var(--jwtd-border2);
  border-radius: var(--jwtd-radius-sm);
  color: var(--jwtd-text);
  font-family: var(--jwtd-font);
  font-size: 13.5px;
  font-weight: 600;
  padding: 12px 20px;
  box-shadow: var(--jwtd-shadow);
  display: flex;
  align-items: center;
  gap: 9px;
  z-index: 9999;
  transform: translateY(12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease;
}

.jwtd-toast.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.jwtd-toast svg {
  width: 16px;
  height: 16px;
  color: var(--jwtd-ok);
  flex-shrink: 0;
}

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 860px) {
  .jwtd-layout {
    grid-template-columns: 1fr;
  }

  .jwtd-hero {
    padding: 44px 18px 32px;
  }

  .jwtd-app {
    padding: 28px 14px 48px;
  }

  .jwtd-actions {
    gap: 8px;
  }

  .jwtd-btn {
    flex: 1 1 auto;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .jwtd-hero h1 { font-size: 1.7rem; }
  .jwtd-btn { padding: 10px 14px; font-size: 13px; }
  .jwtd-json-out { font-size: 11.5px; }
  .jwtd-info-grid { grid-template-columns: 1fr; }
  .jwtd-toast { bottom: 16px; right: 16px; left: 16px; }
}