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

:root {
  /* Backgrounds */
  --color-void:        #0A0E1A;
  --color-deep-navy:   #0D1B2A;
  --color-canvas:      #F7F9FC;
  --color-signal:      #EAECF0;

  /* Primárias */
  --color-scan-blue:   #4A9EFF;
  --color-terminal:    #00E5C8;

  /* Estado / alerta */
  --color-vuln-red:    #FF4D6D;
  --color-warning:     #FFB347;
  --color-access-ok:   #39D353;
  --color-recon:       #7B61FF;

  /* Texto */
  --color-text-primary:   #EAECF0;
  --color-text-secondary: #8A96A8;
  --color-text-muted:     #4A5568;

  --color-border: rgba(74, 158, 255, 0.14);

  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-code:    'JetBrains Mono', monospace;

  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;

  --transition-fast:   0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow:   0.4s ease;
}

body {
  background: var(--color-void);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--color-scan-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-terminal);
}

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Header ────────────────────────────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 0.5px solid var(--color-border);
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.875rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.header-logo { height: 52px; width: auto; display: block; }
@media (min-width: 640px) {
  .header-logo { height: 64px; }
}

.nav-wrapper { position: relative; }

.nav-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  border: 0.5px solid var(--color-border);
  background: none;
  color: var(--color-text-primary);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-toggle-btn:hover {
  background: rgba(74, 158, 255, 0.08);
  border-color: rgba(74, 158, 255, 0.6);
  color: var(--color-scan-blue);
}

.nav-panel {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  z-index: 110;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.85rem;
  min-width: 180px;
  padding: 1rem 1.25rem;
  border-radius: 10px;
  border: 0.5px solid var(--color-border);
  background: var(--color-deep-navy);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}

.nav-panel.hidden { display: none; }

.nav-panel a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.nav-panel a:hover { color: var(--color-text-primary); }

.nav-panel a.active { color: var(--color-terminal); }

.nav-cta {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-void);
  background: var(--color-terminal);
  border: none;
  border-radius: 6px;
  padding: 0.5rem 1.1rem;
  cursor: pointer;
  transition: opacity var(--transition-fast);
  align-self: stretch;
  text-align: center;
}

.nav-cta:hover { opacity: 0.88; color: var(--color-void); }

/* ── Hero ──────────────────────────────────────────────────────────────────── */

.hero {
  text-align: center;
  padding: 3rem 0 2rem;
}

.label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

.subtitle {
  font-family: var(--font-body);
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  margin-top: 0.5rem;
}

/* ── Tool card ─────────────────────────────────────────────────────────────── */

.card {
  background: var(--color-deep-navy);
  border: 0.5px solid rgba(74, 158, 255, 0.15);
  border-radius: var(--radius);
  transition: border-color var(--transition-normal);
}

.tool-card {
  padding: 2rem;
  margin-bottom: 3rem;
}

/* ── Toggle pill (radio groups) ────────────────────────────────────────────── */

.toggle-group {
  border: none;
  margin-bottom: 1.1rem;
}

.toggle-group legend {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.toggle-pill {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--color-void);
  border: 0.5px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 3px;
  gap: 3px;
}

.toggle-pill input[type="radio"] {
  display: none;
}

.toggle-pill label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast);
  user-select: none;
  padding: 0 0.5rem;
}

.toggle-pill label:hover {
  color: var(--color-text-primary);
}

.toggle-pill input[type="radio"]:checked + label {
  background: var(--color-scan-blue);
  color: var(--color-void);
}

/* ── Divider ───────────────────────────────────────────────────────────────── */

.divider {
  border: none;
  border-top: 0.5px solid var(--color-border);
  margin: 1.4rem 0;
}

/* ── Fields ────────────────────────────────────────────────────────────────── */

.field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1.1rem;
}

label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

select,
textarea,
input[type="password"] {
  background: var(--color-void);
  border: 0.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.65rem 0.85rem;
  width: 100%;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

select:focus,
textarea:focus,
input[type="password"]:focus {
  border-color: var(--color-scan-blue);
  box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.18);
  outline: none;
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238A96A8' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  padding-right: 2.5rem;
}

textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.55;
}

/* ── Password field ────────────────────────────────────────────────────────── */

.password-wrap {
  display: flex;
  gap: 0.5rem;
}

.password-wrap input {
  flex: 1;
  min-width: 0;
}

#toggle-password {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  flex-shrink: 0;
  background: var(--color-void);
  border: 0.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

#toggle-password svg {
  width: 18px;
  height: 18px;
  pointer-events: none;
}

#toggle-password:hover {
  background: rgba(74, 158, 255, 0.08);
  color: var(--color-scan-blue);
  border-color: rgba(74, 158, 255, 0.6);
}

/* ── File zone ─────────────────────────────────────────────────────────────── */

.file-zone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 2rem 1rem;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-void);
  text-align: center;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  cursor: pointer;
}

.file-zone:hover,
.file-zone:focus-within {
  border-color: var(--color-scan-blue);
  background: rgba(74, 158, 255, 0.05);
}

.file-zone input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  font-size: 0;
}

.file-zone__icon {
  width: 32px;
  height: 32px;
  color: var(--color-text-secondary);
  pointer-events: none;
  transition: color var(--transition-fast);
}

.file-zone:hover .file-zone__icon,
.file-zone:focus-within .file-zone__icon {
  color: var(--color-scan-blue);
}

.file-zone__label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  pointer-events: none;
}

.file-zone__name {
  font-family: var(--font-code);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-terminal);
  pointer-events: none;
  word-break: break-all;
}

/* ── Buttons ───────────────────────────────────────────────────────────────── */

.btn-secondary {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-scan-blue);
  background: transparent;
  border: 0.5px solid rgba(74, 158, 255, 0.4);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.85rem;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(74, 158, 255, 0.08);
  border-color: rgba(74, 158, 255, 0.7);
}

#submit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  width: 100%;
  font-family: var(--font-body);
  background: var(--color-terminal);
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-void);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 700;
  padding: 0.85rem 1.5rem;
  margin-top: 0.5rem;
  margin-bottom: 1.25rem;
  transition: opacity var(--transition-fast), transform 0.1s ease;
}

#submit-btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

#submit-btn:hover {
  opacity: 0.88;
}

#submit-btn:active {
  transform: scale(0.98);
}

#submit-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-access-ok);
  border-radius: var(--radius-sm);
  color: var(--color-void);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.7rem 1.35rem;
  transition: opacity var(--transition-fast);
}

.btn-download svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.btn-download:hover {
  opacity: 0.88;
  color: var(--color-void);
}

/* ── Spinner ───────────────────────────────────────────────────────────────── */

#spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.spinner-ring {
  width: 20px;
  height: 20px;
  border: 2.5px solid var(--color-border);
  border-top-color: var(--color-scan-blue);
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
  flex-shrink: 0;
}

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

/* ── Messages ──────────────────────────────────────────────────────────────── */

.msg {
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  padding: 0.7rem 1rem;
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.msg.error {
  background: rgba(255, 77, 109, 0.1);
  border: 1px solid rgba(255, 77, 109, 0.3);
  color: var(--color-vuln-red);
}

.msg.success {
  background: rgba(57, 211, 83, 0.1);
  border: 1px solid rgba(57, 211, 83, 0.3);
  color: var(--color-access-ok);
}

/* ── Algorithm warning ─────────────────────────────────────────────────────── */

.algo-warning {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  background: rgba(255, 179, 71, 0.1);
  border: 1px solid rgba(255, 179, 71, 0.3);
  border-radius: var(--radius-sm);
  color: var(--color-warning);
  font-size: 0.83rem;
  line-height: 1.5;
  padding: 0.6rem 0.75rem;
  margin-top: 0.6rem;
}

.algo-warning svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ── Password strength meter ───────────────────────────────────────────────── */

.strength-wrap {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-top: -0.7rem;
  margin-bottom: 1.1rem;
}

.strength-bar {
  flex: 1;
  height: 4px;
  background: var(--color-void);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.strength-fill {
  height: 100%;
  border-radius: var(--radius-pill);
  width: 0%;
  transition: width 0.3s ease, background-color 0.3s ease;
}

.strength-fill.weak        { width: 25%;  background: var(--color-vuln-red); }
.strength-fill.medium      { width: 50%;  background: var(--color-warning); }
.strength-fill.strong      { width: 75%;  background: var(--color-scan-blue); }
.strength-fill.very-strong { width: 100%; background: var(--color-access-ok); }

.strength-label {
  font-size: 0.75rem;
  font-weight: 600;
  min-width: 72px;
  text-align: right;
}

.strength-label.weak        { color: var(--color-vuln-red); }
.strength-label.medium      { color: var(--color-warning); }
.strength-label.strong      { color: var(--color-scan-blue); }
.strength-label.very-strong { color: var(--color-access-ok); }

/* ── Output: terminal block ───────────────────────────────────────────────── */

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.terminal-block {
  background: var(--color-void);
  border: 0.5px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: rgba(255,255,255,0.03);
  border-bottom: 0.5px solid var(--color-border);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-title {
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-left: auto;
}

.terminal-textarea {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 1rem 1.25rem;
  font-family: var(--font-code);
  font-size: 0.85rem;
  color: var(--color-terminal);
  margin: 0;
  line-height: 1.6;
}

.terminal-textarea:focus {
  box-shadow: none;
  border: none;
}

#file-output-msg {
  font-family: var(--font-code);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
}

/* ── Footer ────────────────────────────────────────────────────────────────── */

.site-footer {
  background: var(--color-deep-navy);
  border-top: 0.5px solid var(--color-border);
  padding: 3.5rem 0 0;
  margin-top: 3rem;
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
}

.footer-brand .logo-mark { margin-bottom: 0.9rem; }

.footer-logo { height: 32px; width: auto; display: block; }

.footer-brand p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 320px;
}

.footer-col .label {
  margin-bottom: 1rem;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.7rem; }

.footer-col a {
  font-size: 0.85rem;
  color: var(--color-text-primary);
}

.footer-col a:hover { color: var(--color-terminal); }

.social-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  border-radius: 7px;
  border: 0.5px solid var(--color-border);
  background: rgba(255,255,255,0.02);
  color: var(--color-text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}

.social-link svg { width: 15px; height: 15px; flex-shrink: 0; }

.social-link:hover {
  color: var(--color-terminal);
  border-color: rgba(0, 229, 200, 0.4);
  background: rgba(0, 229, 200, 0.06);
}

.footer-bottom {
  border-top: 0.5px solid var(--color-border);
  padding: 1.4rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-bottom .copy {
  font-family: var(--font-code);
  font-size: 0.72rem;
  color: var(--color-text-secondary);
}

.footer-bottom .copy .accent { color: var(--color-terminal); }

.status-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-code);
  font-size: 0.72rem;
  color: var(--color-text-secondary);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-access-ok);
  box-shadow: 0 0 6px rgba(57, 211, 83, 0.7);
}

/* ── Utility ───────────────────────────────────────────────────────────────── */

.hidden {
  display: none !important;
}

/* ── Responsive ────────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .tool-card {
    padding: 1.5rem 1.25rem;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  .toggle-pill label {
    font-size: 0.85rem;
    min-height: 44px;
  }

  #submit-btn {
    padding: 0.95rem 1.5rem;
    font-size: 0.95rem;
  }

  #toggle-password {
    width: 48px;
  }
}