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

/* ── CSS Variables ── */
:root {
  --bg: #1a1a2e;
  --accent: #ff4500;
  --accent-hover: #e03e00;
  --accent-glow: rgba(255, 69, 0, 0.15);
  --text: #ffffff;
  --secondary: #8888aa;
  --card: #16213e;
  --card-border: #0f3460;
  --input-bg: #0f3460;
  --input-border: #1a4a7a;
  --success: #22c55e;
  --success-bg: rgba(34, 197, 94, 0.1);
  --error: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.1);
  --pending: #f59e0b;
  --pending-bg: rgba(245, 158, 11, 0.1);
  --info: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.1);
  --radius: 10px;
  --max-width: 480px;
  --font-heading: 'Syne', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.3);
  --transition: 0.2s ease;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity var(--transition);
}

a:hover {
  opacity: 0.85;
}

img {
  max-width: 100%;
  display: block;
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-content {
  flex: 1;
  padding: 40px 0;
}

/* ── Navbar ── */
.navbar {
  padding: 18px 0;
  border-bottom: 1px solid var(--card-border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.navbar-logo span {
  color: var(--accent);
}

.navbar-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.navbar-links a {
  color: var(--secondary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: color var(--transition);
}

.navbar-links a:hover {
  color: var(--text);
  opacity: 1;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-align: center;
  width: 100%;
  letter-spacing: -0.01em;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(255, 69, 0, 0.25);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 4px 20px rgba(255, 69, 0, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--card-border);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--secondary);
  background: rgba(255, 255, 255, 0.03);
}

.btn-small {
  padding: 10px 18px;
  font-size: 0.8rem;
  width: auto;
}

.btn-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ── Inputs ── */
.input-group {
  margin-bottom: 24px;
}

.input-group label {
  display: block;
  font-size: 0.75rem;
  color: var(--secondary);
  margin-bottom: 8px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text);
  background: var(--input-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.input::placeholder {
  color: #556688;
}

.input-hint {
  font-size: 0.75rem;
  color: var(--secondary);
  margin-top: 6px;
}

/* ── Cards ── */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-lg);
}

.card-header {
  margin-bottom: 24px;
}

.card-header h2 {
  font-size: 1.3rem;
  margin-bottom: 6px;
}

.card-header p {
  font-size: 0.85rem;
  color: var(--secondary);
}

/* ── Alerts ── */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 20px;
  display: none;
  animation: fadeIn 0.2s ease;
}

.alert.show {
  display: block;
}

.alert-success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.alert-error {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.alert-pending {
  background: var(--pending-bg);
  color: var(--pending);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.alert-info {
  background: var(--info-bg);
  color: var(--info);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* ── Loading Spinner ── */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--card-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin: 0 auto;
}

.spinner-large {
  width: 44px;
  height: 44px;
  border-width: 4px;
}

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 40px 0;
  color: var(--secondary);
  font-size: 0.85rem;
}

/* ── QR Code ── */
.qr-container {
  background: #ffffff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 20px 0;
}

.qr-container canvas,
.qr-container img {
  max-width: 200px;
  max-height: 200px;
}

/* ── Fee Breakdown ── */
.fee-table {
  width: 100%;
  margin: 20px 0;
  font-size: 0.85rem;
}

.fee-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--card-border);
}

.fee-row:last-child {
  border-bottom: none;
}

.fee-row.fee-total {
  font-weight: 700;
  border-top: 2px solid var(--secondary);
  border-bottom: none;
  padding-top: 14px;
  margin-top: 6px;
}

.fee-label {
  color: var(--secondary);
}

.fee-value {
  color: var(--text);
  font-weight: 600;
}

.fee-value.accent {
  color: var(--accent);
  font-weight: 700;
}

/* ── Deposit Address Display ── */
.address-display {
  background: var(--input-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 0.75rem;
  word-break: break-all;
  margin: 16px 0;
  position: relative;
  font-family: var(--font-mono);
  color: var(--text);
}

.address-display .copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
}

/* ── Steps ── */
.steps {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin: 28px 0;
}

.step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.step-number {
  width: 36px;
  height: 36px;
  min-width: 36px;
  background: var(--accent);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 2px 8px rgba(255, 69, 0, 0.25);
}

.step-content h3 {
  font-size: 1rem;
  margin-bottom: 4px;
  font-weight: 700;
}

.step-content p {
  font-size: 0.85rem;
  color: var(--secondary);
  line-height: 1.5;
}

/* ── Status Badge ── */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-pending {
  background: var(--pending-bg);
  color: var(--pending);
}

.status-confirmed {
  background: var(--success-bg);
  color: var(--success);
}

.status-forwarded {
  background: var(--success-bg);
  color: var(--success);
}

.status-failed {
  background: var(--error-bg);
  color: var(--error);
}

.status-expired {
  background: rgba(136, 136, 170, 0.1);
  color: var(--secondary);
}

/* ── Countdown Timer ── */
.countdown {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--secondary);
  text-align: center;
  padding: 10px;
}

.countdown.urgent {
  color: var(--error);
}

/* ── Hero Section ── */
.hero {
  text-align: center;
  padding: 64px 0 48px;
}

.hero h1 {
  font-size: 2.6rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero-buttons {
  flex-direction: column;
  align-items: center;
  max-width: 280px;
  margin: 0 auto;
}

.hero-buttons .btn {
  width: 100%;
}

.hero p {
  font-size: 1rem;
  color: var(--secondary);
  margin-bottom: 40px;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* ── How It Works Grid ── */
#how-it-works {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

#how-it-works > .section-header {
  grid-column: 1 / -1;
}

#how-it-works > .card {
  margin-bottom: 0;
}

/* ── Features Grid ── */
.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 40px 0;
}

.feature {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px 18px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.feature:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(255, 69, 0, 0.1);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  background: rgba(255, 69, 0, 0.08);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature h3 {
  font-size: 0.85rem;
  margin-bottom: 6px;
  font-weight: 700;
}

.feature p {
  font-size: 0.75rem;
  color: var(--secondary);
  line-height: 1.5;
}

/* ── Section Headers ── */
.section-header {
  text-align: center;
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 1.75rem;
  margin-bottom: 10px;
}

.section-header p {
  font-size: 0.9rem;
  color: var(--secondary);
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--card-border);
  padding: 28px 0;
  text-align: center;
  font-size: 0.75rem;
  color: var(--secondary);
}

.footer a {
  color: var(--secondary);
}

/* ── VeerLink Display ── */
.veerlink {
  background: var(--input-bg);
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  margin: 20px 0;
  box-shadow: 0 2px 16px rgba(255, 69, 0, 0.12);
}

.veerlink-url {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
  word-break: break-all;
  font-family: var(--font-mono);
}

/* ── Claimable Payment List ── */
.payment-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.payment-item {
  background: var(--input-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: border-color var(--transition);
}

.payment-item:hover {
  border-color: var(--accent);
}

.payment-amount {
  font-size: 1.15rem;
  font-weight: 700;
  font-family: var(--font-heading);
}

/* ── Success Checkmark ── */
.success-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: var(--success-bg);
  border: 2px solid var(--success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--success);
}

/* ── Utility ── */
.text-center { text-align: center; }
.text-secondary { color: var(--secondary); }
.text-accent { color: var(--accent); }
.text-small { font-size: 0.8rem; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.hidden { display: none !important; }

/* ── Animations ── */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ── */

/* Mobile */
@media (max-width: 480px) {
  .hero {
    padding: 48px 0 36px;
  }

  .hero h1 {
    font-size: 2.1rem;
  }

  .hero p {
    font-size: 0.9rem;
    margin-bottom: 32px;
  }

  .navbar-links {
    gap: 18px;
  }

  .navbar-links a {
    font-size: 0.75rem;
  }

  .card {
    padding: 22px 18px;
  }

  .section-header h2 {
    font-size: 1.4rem;
  }

  .btn-group {
    gap: 10px;
  }
}

/* Tablet */
@media (min-width: 481px) and (max-width: 767px) {
  .container {
    max-width: 520px;
  }

  .features {
    grid-template-columns: 1fr 1fr;
  }
}

/* Tablet+ hero buttons side by side */
@media (min-width: 768px) {
  .hero-buttons {
    flex-direction: row;
    max-width: 580px;
  }

  .hero-buttons .btn {
    max-width: 280px;
  }
}

/* Tablet wide */
@media (min-width: 768px) and (max-width: 900px) {
  .container {
    max-width: 960px;
  }

  #how-it-works {
    grid-template-columns: 1fr 1fr;
  }

  .features {
    grid-template-columns: 1fr 1fr;
  }
}

/* Desktop */
@media (min-width: 901px) {
  .container {
    max-width: 960px;
  }

  #how-it-works {
    grid-template-columns: 1fr 1fr;
  }

  .features {
    grid-template-columns: repeat(4, 1fr);
  }
}