/* ============================================================
   style.css — Verifiable Wallet Transaction Explainer
   OpenGradient Dark Green Theme — Colorful & Modern
   ============================================================ */

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

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  /* OpenGradient greens */
  --og-green: #00e68a;
  --og-green-dim: #00e68a22;
  --og-green-mid: #00e68a44;
  --og-green-bright: #33ffaa;
  --og-dark: #0a1a14;
  --og-darker: #060f0b;
  --og-card: #0d2018;
  --og-card-border: #153027;
  --og-card-hover: #14281f;

  /* Accent colors */
  --cyan: #22d3ee;
  --cyan-dim: #22d3ee22;
  --purple: #a78bfa;
  --purple-dim: #a78bfa22;
  --amber: #fbbf24;
  --amber-dim: #fbbf2422;
  --rose: #fb7185;
  --rose-dim: #fb718522;
  --blue: #60a5fa;
  --blue-dim: #60a5fa22;

  /* Neutrals */
  --text-primary: #e8f5ee;
  --text-secondary: #8aad9a;
  --text-muted: #4d7561;
  --text-dim: #2d4a3a;

  /* Fonts */
  --font-body: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Layout */
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--og-darker);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── Animated background ───────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% -10%, rgba(0, 230, 138, 0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 110%, rgba(34, 211, 238, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(167, 139, 250, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* Subtle grid pattern */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 230, 138, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 230, 138, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ── Container ─────────────────────────────────────────────── */
.container {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

/* ── Header ────────────────────────────────────────────────── */
.header {
  text-align: center;
  margin-bottom: 44px;
  animation: fadeDown 0.7s ease-out;
}

.header__logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--og-green-dim);
  border: 1px solid var(--og-green-mid);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--og-green);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.header__logo .pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--og-green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--og-green);
  animation: glow-pulse 2s ease-in-out infinite;
}

.header__title {
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #ffffff 0%, var(--og-green-bright) 50%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header__subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.6;
}

.header__subtitle strong {
  color: var(--og-green);
  font-weight: 600;
}

/* ── How it works banner ───────────────────────────────────── */
.how-it-works {
  display: flex;
  gap: 0;
  margin-bottom: 28px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--og-card-border);
  animation: fadeUp 0.6s ease-out 0.08s both;
}

.how-step {
  flex: 1;
  padding: 16px 14px;
  text-align: center;
  background: var(--og-card);
  position: relative;
}

.how-step:not(:last-child)::after {
  content: '→';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  color: var(--og-green);
  font-size: 0.9rem;
  font-weight: 700;
}

.how-step__icon {
  font-size: 1.3rem;
  margin-bottom: 4px;
}

.how-step__label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.how-step__sublabel {
  font-size: 0.62rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-top: 2px;
}

/* ── Input Card ────────────────────────────────────────────── */
.input-card {
  background: var(--og-card);
  border: 1px solid var(--og-card-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 20px;
  animation: fadeUp 0.6s ease-out 0.15s both;
  position: relative;
  overflow: hidden;
}

.input-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--og-green), var(--cyan), var(--purple));
}

.input-card__label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.input-card__field {
  display: flex;
  gap: 10px;
}

.input-card__input {
  flex: 1;
  background: var(--og-darker);
  border: 1.5px solid var(--og-card-border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition);
}

.input-card__input::placeholder { color: var(--text-dim); }

.input-card__input:focus {
  border-color: var(--og-green);
  box-shadow: 0 0 0 3px var(--og-green-dim), 0 0 20px var(--og-green-dim);
}

.input-card__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: linear-gradient(135deg, #00cc7a 0%, #00e68a 50%, #22d3ee 100%);
  color: #0a1a14;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.input-card__btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.15) 50%, transparent 100%);
  transform: translateX(-100%);
  transition: transform 0.5s;
}

.input-card__btn:hover::before { transform: translateX(100%); }

.input-card__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 230, 138, 0.3);
}

.input-card__btn:active { transform: translateY(0); }

.input-card__btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.input-card__btn svg { width: 18px; height: 18px; }

/* Spinner */
.spinner {
  width: 18px; height: 18px;
  border: 2.5px solid rgba(10, 26, 20, 0.3);
  border-top-color: var(--og-dark);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* Example hash */
.example-hash {
  margin-top: 14px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.example-hash span {
  color: var(--og-green);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  border-bottom: 1px dashed var(--og-green-mid);
  transition: all var(--transition);
}

.example-hash span:hover {
  color: var(--og-green-bright);
  text-shadow: 0 0 8px var(--og-green-dim);
}

/* ── Error ─────────────────────────────────────────────────── */
.error-box {
  display: none;
  background: var(--rose-dim);
  border: 1px solid rgba(251, 113, 133, 0.25);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin-bottom: 20px;
  font-size: 0.85rem;
  color: var(--rose);
  animation: shake 0.4s ease-out;
}

.error-box.visible { display: block; }

/* ── Results ───────────────────────────────────────────────── */
.results { display: none; }
.results.visible { display: block; animation: fadeUp 0.5s ease-out; }

/* ── Result Cards ──────────────────────────────────────────── */
.result-card {
  background: var(--og-card);
  border: 1px solid var(--og-card-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 14px;
  transition: border-color var(--transition);
}

.result-card:hover { border-color: rgba(0, 230, 138, 0.2); }

.result-card__header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.result-card__icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.result-card__icon--overview { background: var(--og-green-dim); }
.result-card__icon--explain  { background: var(--cyan-dim); }
.result-card__icon--gas      { background: var(--amber-dim); }
.result-card__icon--transfer { background: var(--purple-dim); }
.result-card__icon--proof    { background: var(--og-green-dim); }

.result-card__title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

.result-card__body {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.result-card__body p { margin-bottom: 8px; }
.result-card__body strong { color: var(--text-primary); font-weight: 600; }

/* ── Transaction Overview Grid ─────────────────────────────── */
.tx-overview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.tx-field {
  background: var(--og-darker);
  border: 1px solid var(--og-card-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.tx-field__label {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.tx-field__value {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
  word-break: break-all;
}

.tx-field__value--success { color: var(--og-green); }
.tx-field__value--hash { color: var(--cyan); }
.tx-field__value--amount { color: var(--amber); }
.tx-field--full { grid-column: 1 / -1; }

/* ── Transfers Table ───────────────────────────────────────── */
.transfers-list {
  width: 100%;
  border-collapse: collapse;
}

.transfers-list th {
  text-align: left;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 8px 12px;
  border-bottom: 1px solid var(--og-card-border);
}

.transfers-list td {
  padding: 12px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(21, 48, 39, 0.5);
}

.token-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.token-badge--usdt { background: var(--og-green-dim); color: var(--og-green); }
.token-badge--weth { background: var(--blue-dim); color: var(--blue); }
.token-badge--default { background: var(--purple-dim); color: var(--purple); }

/* ── Proof Section ─────────────────────────────────────────── */
.proof-verified {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--og-green-dim);
  border: 1px solid var(--og-green-mid);
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--og-green);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.proof-verified .check-icon { font-size: 0.85rem; }

.proof-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}

.proof-field {
  background: var(--og-darker);
  border: 1px solid var(--og-card-border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
}

.proof-field--full { grid-column: 1 / -1; }

.proof-field__label {
  font-size: 0.66rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 3px;
}

.proof-field__value {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--og-green);
  word-break: break-all;
}

.proof-field__value a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed var(--cyan-dim);
  transition: all var(--transition);
}

.proof-field__value a:hover {
  color: var(--cyan);
  text-shadow: 0 0 8px var(--cyan-dim);
}

.proof-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 8px;
  padding: 10px 14px;
  background: rgba(0, 230, 138, 0.05);
  border-radius: var(--radius-xs);
  border-left: 3px solid var(--og-green-mid);
}

/* ── Footer ────────────────────────────────────────────────── */
.footer {
  text-align: center;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--og-card-border);
  font-size: 0.75rem;
  color: var(--text-muted);
  animation: fadeUp 0.6s ease-out 0.3s both;
}

.footer a {
  color: var(--og-green);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition);
}

.footer a:hover { text-shadow: 0 0 8px var(--og-green-dim); }

.footer__links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 10px;
}

.footer__links a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 4px 10px;
  border: 1px solid var(--og-card-border);
  border-radius: 100px;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.footer__links a:hover {
  border-color: var(--og-green-mid);
  color: var(--og-green);
  background: var(--og-green-dim);
}

/* ── Animations ────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes glow-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px var(--og-green); }
  50% { opacity: 0.5; box-shadow: 0 0 4px var(--og-green); }
}

@keyframes spin { to { transform: rotate(360deg); } }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* Card entrance stagger */
.results.visible .result-card:nth-child(1) { animation: fadeUp 0.4s ease-out 0.0s both; }
.results.visible .result-card:nth-child(2) { animation: fadeUp 0.4s ease-out 0.08s both; }
.results.visible .result-card:nth-child(3) { animation: fadeUp 0.4s ease-out 0.16s both; }
.results.visible .result-card:nth-child(4) { animation: fadeUp 0.4s ease-out 0.24s both; }
.results.visible .result-card:nth-child(5) { animation: fadeUp 0.4s ease-out 0.32s both; }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 640px) {
  .container { padding: 28px 14px 60px; }
  .header__title { font-size: 1.7rem; }
  .input-card__field { flex-direction: column; }
  .input-card__btn { justify-content: center; }
  .tx-overview, .proof-grid { grid-template-columns: 1fr; }
  .how-it-works { flex-direction: column; }
  .how-step:not(:last-child)::after { content: '↓'; right: 50%; bottom: -4px; top: auto; transform: translateX(50%); }
}