@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

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

:root {
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-light: #eff6ff;
  --blue-border: #bfdbfe;
  --green: #16a34a;
  --green-dark: #15803d;
  --red: #dc2626;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.07), 0 4px 6px rgba(0,0,0,.05), 0 1px 2px rgba(0,0,0,.04);
  --shadow-card: var(--shadow-sm), var(--shadow-md), var(--shadow-lg);
  --shadow-xl: 0 20px 25px rgba(0,0,0,.08), 0 8px 10px rgba(0,0,0,.04);
  --transition: 0.15s ease;
  --indigo: #6366f1;
  --indigo-light: #eef2ff;
  --blue-gradient: linear-gradient(135deg, #2563eb, #4f46e5);
  --header-grid-color: rgba(255,255,255,.035);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(160deg, #eef2ff 0%, #f8fafc 40%, #f8fafc 100%);
  color: var(--gray-800);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Header */
header {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #1e1b4b 100%);
  color: white;
  padding: 36px 32px 32px;
  text-align: center;
  border-bottom: 1px solid rgba(255,255,255,.06);
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, var(--header-grid-color) 0px, var(--header-grid-color) 1px, transparent 1px, transparent 48px),
    repeating-linear-gradient(90deg, var(--header-grid-color) 0px, var(--header-grid-color) 1px, transparent 1px, transparent 48px);
  pointer-events: none;
}

header > * { position: relative; z-index: 1; }

.logo {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

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

.logo span {
  color: #60a5fa;
  background: linear-gradient(135deg, #60a5fa, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  margin-top: 10px;
  color: rgba(255,255,255,.7);
  font-size: 1rem;
  font-weight: 400;
}

.tagline-sub {
  margin-top: 5px;
  color: rgba(255,255,255,.4);
  font-size: .85rem;
  font-weight: 400;
}

main {
  max-width: 760px;
  margin: 36px auto;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Card */
.card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--gray-200);
  padding: 28px 32px;
  transition: box-shadow var(--transition);
}

.card h2 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--gray-800);
  letter-spacing: -.2px;
}

/* Step number badge */
.step-num {
  background: var(--blue-gradient);
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: .82rem;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 3px 8px rgba(37,99,235,.4);
}

/* Drop zone */
.drop-zone {
  border: 2px dotted var(--gray-300);
  border-radius: var(--radius);
  padding: 48px 24px;
  min-height: 240px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.drop-zone:hover {
  border-color: var(--blue);
  background: var(--blue-light);
  box-shadow: 0 0 0 4px rgba(37,99,235,.06);
}

.drop-zone.over {
  border-color: var(--blue);
  border-style: solid;
  background: var(--blue-light);
  box-shadow: 0 0 0 4px rgba(37,99,235,.1);
  animation: pulse-border 0.8s ease infinite alternate;
}

@keyframes pulse-border {
  from { box-shadow: 0 0 0 3px rgba(37,99,235,.08); }
  to   { box-shadow: 0 0 0 6px rgba(37,99,235,.15); }
}

.drop-icon {
  color: var(--gray-300);
  margin-bottom: 14px;
  transition: color var(--transition), transform var(--transition);
}

.drop-zone:hover .drop-icon,
.drop-zone.over .drop-icon {
  color: var(--blue);
  transform: translateY(-4px);
}

.drop-zone p { color: var(--gray-600); font-size: .95rem; }
.drop-zone .hint { font-size: .82rem; color: var(--gray-400); margin-top: 6px; }

.file-label {
  color: var(--blue);
  font-weight: 600;
  text-decoration: underline;
  cursor: pointer;
}

/* Preview */
.preview-box {
  display: flex;
  gap: 20px;
  align-items: center;
  padding: 16px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
}

.preview-box img {
  width: 120px;
  height: 90px;
  object-fit: contain;
  border-radius: 6px;
  background: var(--gray-200);
}

.preview-info p {
  font-size: .88rem;
  color: var(--gray-500);
  margin-bottom: 4px;
}

.preview-info p:first-child {
  font-weight: 600;
  color: var(--gray-800);
  font-size: .9rem;
}

/* Form */
.form-group { margin-bottom: 20px; }

.form-group > label {
  display: block;
  font-size: .78rem;
  font-weight: 600;
  color: var(--gray-500);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: .6px;
}

.form-row {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
}

.form-row .form-group {
  flex: 1;
  margin-bottom: 0;
}

.form-row input {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-family: inherit;
  color: var(--gray-800);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  background: white;
}

.form-row input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}

/* Preset grid */
.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
}

.preset-btn, .dpi-btn {
  background: white;
  border: 1.5px solid var(--gray-200);
  border-radius: 12px;
  padding: 14px 16px;
  cursor: pointer;
  text-align: left;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
}

.preset-btn strong, .dpi-btn strong {
  font-size: .9rem;
  font-weight: 600;
  color: var(--gray-800);
  display: block;
  font-family: inherit;
}

.preset-btn span, .dpi-btn span {
  font-size: .78rem;
  color: var(--gray-500);
  display: block;
  font-family: inherit;
  line-height: 1.4;
}

.preset-btn:hover, .dpi-btn:hover {
  border-color: var(--blue);
  box-shadow: 0 4px 12px rgba(37,99,235,.12);
  transform: translateY(-2px);
}

.preset-btn.active, .dpi-btn.active {
  border-color: var(--blue);
  background: linear-gradient(135deg, var(--blue-light) 0%, #f0f4ff 100%);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.preset-btn.active strong, .dpi-btn.active strong {
  color: var(--blue-dark);
}

/* Checkmark on active preset */
.preset-btn.active::after, .dpi-btn.active::after {
  content: '';
  position: absolute;
  top: 8px;
  right: 8px;
  width: 16px;
  height: 16px;
  background: var(--blue);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2 6l3 3 5-5' stroke='white' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: 10px;
  background-repeat: no-repeat;
  background-position: center;
}

.dpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 10px;
}

/* Method grid — always 2 columns */
#method-grid {
  grid-template-columns: 1fr 1fr;
}

.preset-btn .badge-rec {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: var(--blue);
  color: #fff;
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .3px;
  padding: 2px 8px;
  border-radius: 20px;
  margin-top: 6px;
  width: fit-content;
}

.preset-btn.active .badge-rec {
  background: var(--blue-dark);
  color: #fff;
}

/* Format radio */
.format-row {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .9rem;
  cursor: pointer;
  color: var(--gray-600);
  transition: color var(--transition);
}

.radio-label:hover { color: var(--gray-800); }

/* Output info */
.output-info {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--blue-light);
  border-radius: var(--radius-sm);
  border: 1px solid var(--blue-border);
  padding: 12px 16px;
}

.info-item { display: flex; flex-direction: column; gap: 1px; }
.info-label { font-size: .72rem; color: var(--gray-500); text-transform: uppercase; letter-spacing: .5px; font-weight: 500; }
.info-value { font-size: 1.05rem; font-weight: 700; color: var(--blue-dark); letter-spacing: -.3px; }

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--blue-gradient);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 13px 28px;
  font-size: .95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition), opacity var(--transition);
  box-shadow: 0 2px 8px rgba(37,99,235,.3);
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(37,99,235,.5);
  outline-offset: 2px;
}

#btn-process {
  width: 100%;
  padding: 15px 28px;
  font-size: 1rem;
  letter-spacing: -.1px;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--blue-dark), #4338ca);
  box-shadow: 0 4px 14px rgba(37,99,235,.4);
  transform: translateY(-1px);
}

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

.btn-primary:disabled {
  opacity: .4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Pay button — green */
#btn-pay {
  background: linear-gradient(135deg, #16a34a, #15803d);
  box-shadow: 0 2px 8px rgba(22,163,74,.35);
}

#btn-pay:hover {
  background: linear-gradient(135deg, #15803d, #166534);
  box-shadow: 0 4px 14px rgba(22,163,74,.45);
}

#btn-pay:disabled {
  opacity: .4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  background: white;
  color: var(--gray-600);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 8px 18px;
  font-size: .88rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), box-shadow var(--transition);
}

.btn-secondary:hover {
  border-color: var(--gray-400);
  color: var(--gray-800);
  box-shadow: var(--shadow-sm);
}

/* Progress */
.progress-wrap { margin-top: 20px; }

.progress-bar {
  height: 8px;
  background: var(--gray-100);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 12px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #2563eb, #6366f1, #818cf8);
  border-radius: 4px;
  width: 0%;
  animation: progress-anim 2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes progress-anim {
  0%   { width: 5%;  margin-left: 0; }
  50%  { width: 55%; margin-left: 22%; }
  100% { width: 5%;  margin-left: 95%; }
}

#progress-label {
  font-size: .88rem;
  color: var(--gray-500);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.spinner {
  animation: spin 1s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Result */
.result-box {
  margin-top: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 24px;
  background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 60%, #d1fae5 100%);
  border: 1px solid #86efac;
  border-radius: var(--radius);
  flex-wrap: wrap;
  box-shadow: 0 4px 16px rgba(22,163,74,.1);
}

.result-icon {
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  color: white;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(22,163,74,.35);
  animation: check-pop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes check-pop {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.result-info { flex: 1; min-width: 160px; }
.result-info p { font-size: .88rem; color: var(--gray-500); }
.result-info p:first-child { font-weight: 700; color: var(--gray-800); font-size: .95rem; margin-bottom: 2px; }

/* Error */
.error-box {
  margin-top: 20px;
  padding: 16px 20px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

#error-msg {
  flex: 1;
  color: var(--red);
  font-size: .9rem;
  font-weight: 500;
}

/* Bypass row */
.bypass-row {
  display: flex;
  gap: 8px;
  width: 100%;
  margin-top: 4px;
}

.bypass-input {
  flex: 1;
  padding: 8px 12px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: .85rem;
  font-family: inherit;
  color: var(--gray-600);
  outline: none;
  background: rgba(255,255,255,.7);
  transition: border-color var(--transition);
}

.bypass-input:focus {
  border-color: var(--gray-400);
}

.btn-bypass {
  padding: 8px 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  background: white;
  color: var(--gray-600);
  font-size: .85rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color var(--transition), color var(--transition);
}

.btn-bypass:hover {
  border-color: var(--gray-400);
  color: var(--gray-800);
}

.btn-bypass:disabled {
  opacity: .5;
  cursor: not-allowed;
}

/* Scale input (Manter proporção) */
.scale-input {
  width: 100%;
  max-width: 220px;
  padding: 10px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-family: inherit;
  color: var(--gray-800);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  background: white;
}

.scale-input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}

.scale-warning {
  margin-top: 8px;
  color: var(--red);
  font-size: .82rem;
  font-weight: 500;
}

/* Utility */
.hidden { display: none !important; }

footer {
  border-top: 1px solid var(--gray-200);
  padding: 20px 32px;
}

.footer-inner {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copy {
  color: var(--gray-400);
  font-size: .82rem;
}

.footer-trust {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--gray-400);
  font-size: .82rem;
}

.footer-trust svg { flex-shrink: 0; }

@media (max-width: 600px) {
  header { padding: 24px 20px 20px; }
  .logo { font-size: 2rem; }
  main { margin: 24px auto; gap: 16px; }
  .card { padding: 20px 18px; }
  .preset-grid { grid-template-columns: 1fr 1fr; }
  .preview-box { flex-direction: column; }
  .preview-box img { width: 100%; height: 160px; }
  .result-box { flex-direction: column; text-align: center; }
  .result-icon { margin: 0 auto; }
  .output-info { gap: 16px; }
  .form-row { flex-direction: column; gap: 12px; }
  .steps-progress { display: none; }
  .footer-inner { flex-direction: column; text-align: center; }
  .header-badge { font-size: .68rem; }
}

/* ── Header badge ── */
.header-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(99,102,241,.18);
  border: 1px solid rgba(99,102,241,.3);
  color: #a5b4fc;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .8px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
}

/* ── Step icon nos h2 ── */
.step-icon {
  color: var(--blue);
  opacity: .65;
  flex-shrink: 0;
}

/* ── Card accent border ── */
#step-upload  { border-left: 3px solid var(--blue); }
#step-options { border-left: 3px solid var(--indigo); }
#step-process { border-left: 3px solid var(--green); }

/* ── Steps progress indicator ── */
.steps-progress {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
  padding: 0 16px;
}

.step-pip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.step-pip-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gray-200);
  color: var(--gray-500);
  font-size: .78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

.step-pip.active .step-pip-num {
  background: var(--blue-gradient);
  color: white;
  box-shadow: 0 2px 8px rgba(37,99,235,.35);
}

.step-pip-label {
  font-size: .68rem;
  font-weight: 500;
  color: var(--gray-400);
  letter-spacing: .3px;
  text-transform: uppercase;
}

.step-pip.active .step-pip-label { color: var(--blue); }

.step-pip-connector {
  flex: 1;
  height: 2px;
  background: var(--gray-200);
  min-width: 48px;
  max-width: 80px;
  margin-bottom: 18px;
}

/* ── Preço nos botões de método ── */
.method-price {
  display: inline-block;
  font-size: .95rem;
  font-weight: 700;
  color: var(--gray-600);
  margin-top: 5px;
}

.method-price--highlight { color: var(--blue-dark); }
.preset-btn.active .method-price--highlight { color: var(--blue); }