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

:root {
  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-primary-light: #eef2ff;
  --color-primary-50: #e0e7ff;
  --color-success: #059669;
  --color-success-light: #ecfdf5;
  --color-success-border: #a7f3d0;
  --color-error: #dc2626;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-border-hover: #cbd5e1;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.07), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --transition: 0.2s ease;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* Top accent bar */
.accent-bar {
  height: 4px;
  background: linear-gradient(90deg, #6366f1, #2563eb, #06b6d4);
  position: sticky;
  top: 0;
  z-index: 10;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

/* ─── Header ─── */
header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.logo-mark {
  margin-bottom: 0.75rem;
}

.logo-mark svg {
  filter: drop-shadow(0 2px 8px rgba(99, 102, 241, 0.3));
}

header h1 {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.subtitle {
  color: var(--color-text-muted);
  margin-top: 0.25rem;
  font-size: 0.95rem;
}

/* ─── View panels (form / result) ─── */
.view-panel {
  animation: fadeSlideIn 0.35s ease;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── Fieldsets ─── */
fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.25rem 0.5rem;
  margin-bottom: 1rem;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}

fieldset:focus-within {
  border-color: var(--color-primary-50);
  box-shadow: var(--shadow-md);
}

legend {
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0 0.5rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-icon {
  color: var(--color-primary);
  flex-shrink: 0;
}

/* ─── Form elements ─── */
.form-group {
  margin-bottom: 0.9rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}

label {
  display: block;
  font-weight: 500;
  font-size: 0.82rem;
  margin-bottom: 0.3rem;
  color: var(--color-text);
}

.req {
  color: var(--color-error);
}

input[type="text"],
input[type="url"],
input[type="date"],
input[type="email"] {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

input::placeholder {
  color: var(--color-text-light);
}

small {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  margin-top: 0.25rem;
}

/* ─── File upload ─── */
.file-upload {
  position: relative;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), background var(--transition);
  cursor: pointer;
  overflow: hidden;
}

.file-upload:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.file-upload input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  z-index: 2;
}

.file-upload-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.file-upload-content svg {
  color: var(--color-text-light);
  margin-bottom: 0.25rem;
}

.file-upload-content strong {
  color: var(--color-primary);
}

.file-upload-content small {
  text-align: center;
}

.file-upload-preview {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: var(--color-primary-light);
}

.file-upload-preview img {
  max-height: 64px;
  max-width: 200px;
  object-fit: contain;
  border-radius: 6px;
}

.remove-logo {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  font-size: 1rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  padding: 0;
  z-index: 3;
}

.remove-logo:hover {
  background: rgba(0, 0, 0, 0.7);
}

/* ─── Buttons ─── */
.form-actions {
  text-align: center;
  margin: 1.5rem 0 0.75rem;
}

button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.75rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
}

.btn-icon {
  flex-shrink: 0;
}

button[type="submit"] {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff;
  padding: 0.75rem 2rem;
  font-size: 0.95rem;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
}

button[type="submit"]:hover {
  background: linear-gradient(135deg, #5b5ce6, #4338ca);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
  transform: translateY(-1px);
}

button[type="submit"]:active {
  transform: translateY(0);
}

.btn-outline {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-light);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* ─── Error ─── */
.error-msg {
  background: #fef2f2;
  color: var(--color-error);
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin-top: 1rem;
  font-size: 0.85rem;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* ─── Result view ─── */
.success-banner {
  text-align: center;
  background: linear-gradient(135deg, #ecfdf5, #f0fdf4);
  border: 1px solid var(--color-success-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  margin-bottom: 1.5rem;
}

.success-icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-success);
  margin-bottom: 0.75rem;
  animation: popIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes popIn {
  from { transform: scale(0); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.check-icon {
  color: #fff;
}

.success-banner h2 {
  color: var(--color-text);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.success-banner p {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.success-banner code {
  background: var(--color-success-border);
  padding: 0.15rem 0.5rem;
  border-radius: 5px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-success);
}

/* ─── Result cards (cert + badge) ─── */
.result-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.result-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem 1rem;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.result-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.result-card-primary {
  border-color: var(--color-primary-50);
  background: var(--color-primary-light);
}

.result-card-primary:hover {
  border-color: var(--color-primary);
}

.result-card-icon {
  color: var(--color-primary);
}

.result-card-label {
  font-weight: 600;
  font-size: 0.88rem;
}

.arrow-icon {
  color: var(--color-text-light);
  transition: transform var(--transition), color var(--transition);
}

.result-card:hover .arrow-icon {
  color: var(--color-primary);
  transform: translateX(3px);
}

/* ─── Result sections ─── */
.result-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.25rem;
  margin-bottom: 0.9rem;
  box-shadow: var(--shadow-sm);
}

.result-section-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.4rem;
}

.section-icon {
  color: var(--color-primary);
  flex-shrink: 0;
}

.result-section h3 {
  font-size: 0.92rem;
  font-weight: 600;
}

.result-section p {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 0.6rem;
}

.code-block {
  position: relative;
  background: #f1f5f9;
  border-radius: var(--radius);
  padding: 0.7rem 3.5rem 0.7rem 0.9rem;
  overflow-x: auto;
}

.code-block pre {
  font-size: 0.78rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-all;
  font-family: 'SF Mono', 'Fira Code', Consolas, monospace;
  color: var(--color-text);
}

.copy-btn {
  position: absolute;
  top: 50%;
  right: 0.5rem;
  transform: translateY(-50%);
  padding: 0.3rem 0.6rem;
  font-size: 0.72rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: 6px;
  gap: 0.25rem;
  box-shadow: var(--shadow-sm);
}

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

/* QR */
.qr-section {
  text-align: center;
}

.qr-section .result-section-header {
  justify-content: center;
}

#qr-code {
  padding: 0.75rem 0 0.25rem;
}

#qr-code img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ─── Footer ─── */
footer {
  text-align: center;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-light);
  font-size: 0.78rem;
}

footer a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

footer a:hover {
  text-decoration: underline;
}

/* ─── Spinner ─── */
.spinner {
  display: inline-block;
  width: 1em;
  height: 1em;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 0.4rem;
}

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

/* ─── Responsive ─── */
@media (max-width: 600px) {
  .container {
    padding: 1.25rem 1rem 2rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .result-cards {
    grid-template-columns: 1fr;
  }

  header h1 {
    font-size: 1.35rem;
  }

  .step-label {
    display: none;
  }

  .step-line {
    width: 28px;
  }
}