/* SignatureHub - Clean, Professional Design */
/* Developed and designed by useventing.com */

/* ======================== */
/* Shared Navigation Bar    */
/* ======================== */
.top-nav {
  background: #24292e;
  padding: 12px 24px;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
}
.top-nav a {
  color: #fff;
  margin-right: 20px;
  font-size: 14px;
  font-weight: 500;
  opacity: 0.7;
  text-decoration: none;
  transition: opacity 0.2s;
}
.top-nav a:hover {
  opacity: 1;
  text-decoration: none;
}
.top-nav a.active {
  opacity: 1;
}
.top-nav .brand {
  font-weight: 700;
  font-size: 16px;
  opacity: 1;
  margin-right: 32px;
}

:root {
  --color-primary: #1a1a2e;
  --color-secondary: #16213e;
  --color-accent: #0f3460;
  --color-text: #2d3436;
  --color-text-light: #636e72;
  --color-background: #fafbfc;
  --color-white: #ffffff;
  --color-border: #e1e5e9;
  --color-success: #00a676;
  --color-error: #e74c3c;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: all 0.2s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* Header */
header {
  text-align: center;
  padding: 24px 0 32px;
  margin-bottom: 24px;
}

.logo-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.logo {
  height: 48px;
  width: auto;
}

header h1 {
  color: var(--color-primary);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Main Content */
main {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 40px;
  min-height: 420px;
  border: 1px solid var(--color-border);
}

.section {
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hidden {
  display: none !important;
}

h2 {
  color: var(--color-primary);
  font-size: 1.35rem;
  margin-bottom: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

p {
  color: var(--color-text-light);
  margin-bottom: 16px;
}

/* Loading */
#loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 0;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

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

#loading p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* Error */
.error-icon {
  width: 56px;
  height: 56px;
  background: var(--color-error);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 auto 20px;
}

#error {
  text-align: center;
  padding: 48px 24px;
}

#error-message {
  color: var(--color-error);
  font-size: 1rem;
  font-weight: 500;
}

/* Success */
.success-icon {
  width: 72px;
  height: 72px;
  background: var(--color-success);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 24px;
}

#step-success {
  text-align: center;
  padding: 48px 24px;
}

#step-success h2 {
  color: var(--color-success);
  margin-bottom: 12px;
}

.signed-at {
  margin-top: 24px;
  color: var(--color-text-light);
  font-size: 0.9rem;
}

/* Document Info */
.document-info {
  background: var(--color-background);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
  border: 1px solid var(--color-border);
}

.document-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.signer-name {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 0;
}

.signer-roles {
  margin-top: 10px;
  padding: 10px 14px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.document-content {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
  max-height: 320px;
  overflow-y: auto;
  font-size: 0.95rem;
  line-height: 1.7;
}

.document-url {
  margin-bottom: 24px;
}

.document-url a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.document-url a:hover {
  color: var(--color-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  letter-spacing: -0.01em;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-secondary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--color-background);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-white);
  border-color: var(--color-text-light);
}

.btn-link {
  background: none;
  color: var(--color-accent);
  padding: 10px 16px;
  font-weight: 500;
}

.btn-link:hover {
  color: var(--color-primary);
}

/* Verification */
.verification-options {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.verification-options .btn {
  flex: 1;
  min-width: 160px;
}

.code-input-group {
  margin-bottom: 24px;
}

.code-input-group label {
  display: block;
  margin-bottom: 10px;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

#verification-code {
  width: 100%;
  max-width: 220px;
  padding: 16px;
  font-size: 1.75rem;
  text-align: center;
  letter-spacing: 10px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-weight: 600;
  color: var(--color-primary);
  transition: var(--transition);
}

#verification-code:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 26, 46, 0.1);
}

.success-message {
  color: var(--color-success);
  background: rgba(0, 166, 118, 0.08);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 24px;
  font-weight: 500;
  font-size: 0.95rem;
}

.verification-actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

/* Demo Hint */
.demo-hint {
  background: #fffbeb;
  border: 1px solid #fbbf24;
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin: 20px 0;
  color: #92400e;
  font-size: 0.9rem;
}

.demo-hint code {
  background: white;
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.95rem;
  color: #78350f;
}

/* Signature Tabs */
.signature-tabs {
  display: flex;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 24px;
}

.tab {
  flex: 1;
  padding: 14px;
  background: none;
  border: none;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--color-text-light);
  transition: var(--transition);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
}

.tab:hover {
  color: var(--color-primary);
}

.tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Signature Panel */
.signature-panel {
  padding: 24px 0;
}

.signature-panel label,
.signature-panel p {
  display: block;
  margin-bottom: 12px;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

.signature-input {
  width: 100%;
  padding: 16px;
  font-size: 1.05rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  transition: var(--transition);
}

.signature-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 26, 46, 0.1);
}

.signature-preview {
  min-height: 100px;
  padding: 24px;
  background: var(--color-background);
  border-radius: var(--radius-md);
  text-align: center;
  font-family: 'Dancing Script', 'Brush Script MT', 'Segoe Script', cursive;
  font-size: 2.8rem;
  color: var(--color-primary);
  border: 2px dashed var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
}

#signature-canvas {
  width: 100%;
  height: 220px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: crosshair;
  touch-action: none;
  background: var(--color-white);
}

/* Consent */
.consent-section {
  margin: 28px 0;
  padding: 24px;
  background: var(--color-background);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 22px;
  height: 22px;
  margin-top: 2px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

#consent-text {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.6;
}

/* Footer */
footer {
  text-align: center;
  padding: 32px 0;
  color: var(--color-text-light);
  font-size: 0.85rem;
}

footer .attribution {
  margin-top: 8px;
  font-size: 0.8rem;
}

footer .attribution a {
  color: var(--color-accent);
  text-decoration: none;
  transition: var(--transition);
}

footer .attribution a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 640px) {
  .container {
    padding: 20px 16px;
  }

  main {
    padding: 28px 20px;
    border-radius: var(--radius-md);
  }

  header h1 {
    font-size: 1.3rem;
  }

  h2 {
    font-size: 1.2rem;
  }

  .verification-options {
    flex-direction: column;
  }

  .verification-options .btn {
    width: 100%;
  }

  .signature-preview {
    font-size: 2rem;
    min-height: 80px;
  }

  .btn {
    width: 100%;
    padding: 16px 24px;
  }

  #verification-code {
    max-width: 100%;
    font-size: 1.5rem;
  }
}

/* Print styles */
@media print {
  body {
    background: white;
  }

  main {
    box-shadow: none;
    border: none;
  }

  .btn {
    display: none;
  }
}