/* ==============================================================================
   Teste de Envio SMTP - Design System
   High Performance, Clean UI, Fully Responsive (320px -> Ultrawide)
   ============================================================================== */

:root {
  --bg-main: #090d16;
  --bg-card: #111827;
  --bg-card-hover: #162032;
  --bg-input: #0b1120;
  --border: #1f293d;
  --border-focus: #0ea5e9;
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --emerald: #10b981;
  --emerald-dim: rgba(16, 185, 129, 0.12);
  --cyan: #06b6d4;
  --cyan-dim: rgba(6, 182, 212, 0.12);
  --amber: #f59e0b;
  --amber-dim: rgba(245, 158, 11, 0.12);
  --rose: #f43f5e;
  --rose-dim: rgba(244, 63, 94, 0.12);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px -2px rgba(0, 0, 0, 0.5);
  --transition: all 0.18s ease-in-out;
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

/* Header */
.app-header {
  border-bottom: 1px solid var(--border);
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  max-width: 1240px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #0284c7, #06b6d4);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 0 0 16px rgba(6, 182, 212, 0.35);
}

.brand-text h1 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-text p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.header-badges {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.65rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-emerald {
  background: var(--emerald-dim);
  color: var(--emerald);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-cyan {
  background: var(--cyan-dim);
  color: var(--cyan);
  border: 1px solid rgba(6, 182, 212, 0.25);
}

/* Presets Bar */
.presets-section {
  margin: 1.25rem 0 1.5rem;
}

.presets-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

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

.btn-preset {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: var(--transition);
}

.btn-preset:hover {
  background: var(--bg-card-hover);
  color: #fff;
  border-color: #38bdf8;
  transform: translateY(-1px);
}

.btn-preset.active {
  background: #0369a1;
  color: #fff;
  border-color: #38bdf8;
  box-shadow: 0 0 12px rgba(14, 165, 233, 0.3);
}

/* Main Form Grid */
.tester-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 900px) {
  .tester-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

@media (max-width: 480px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.required {
  color: var(--rose);
}

.input-control, select.input-control, textarea.input-control {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 0.6rem 0.8rem;
  font-size: 0.88rem;
  font-family: inherit;
  transition: var(--transition);
}

.input-control:focus, select.input-control:focus, textarea.input-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
}

.input-password-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.btn-toggle-pwd {
  position: absolute;
  right: 0.5rem;
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-toggle-pwd:hover {
  color: var(--text-main);
}

/* Checkbox Toggle */
.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1rem;
  padding: 0.65rem 0.8rem;
  background: rgba(11, 17, 32, 0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.checkbox-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--cyan);
  cursor: pointer;
}

.checkbox-group label {
  margin-bottom: 0;
  cursor: pointer;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Action Buttons */
.action-buttons {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn-submit {
  flex: 2;
  background: linear-gradient(135deg, #059669, #10b981);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
  transition: var(--transition);
}

.btn-submit:hover:not(:disabled) {
  background: linear-gradient(135deg, #047857, #059669);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.4);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-reset {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  transition: var(--transition);
}

.btn-reset:hover {
  background: var(--bg-card-hover);
  color: #fff;
}

/* Stopwatch Timer */
.timer-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: rgba(0, 0, 0, 0.3);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: #fff;
}

/* Diagnostic & Result Cards */
.results-section {
  margin-top: 1.5rem;
}

.result-card {
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  display: none;
  animation: slideDown 0.2s ease-out;
}

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

.result-card.success {
  display: block;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.result-card.error {
  display: block;
  background: rgba(244, 63, 94, 0.08);
  border: 1px solid rgba(244, 63, 94, 0.4);
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.result-title {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.result-card.success .result-title {
  color: var(--emerald);
}

.result-card.error .result-title {
  color: var(--rose);
}

.result-message {
  font-size: 0.9rem;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.diagnosis-box {
  margin-top: 0.75rem;
  padding: 0.85rem 1rem;
  background: rgba(245, 158, 11, 0.1);
  border-left: 4px solid var(--amber);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: #fef08a;
  line-height: 1.45;
}

.diagnosis-box strong {
  display: block;
  color: var(--amber);
  margin-bottom: 0.25rem;
  font-size: 0.88rem;
}

/* Terminal Console */
.terminal-card {
  background: #060911;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
}

.terminal-header {
  background: #0d1322;
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.terminal-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mac-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}
.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 0.5rem;
}

.terminal-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-terminal {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  padding: 0.3rem 0.65rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-family: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: var(--transition);
}

.btn-terminal:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.terminal-body {
  padding: 1rem;
  max-height: 420px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  color: #cbd5e1;
}

.terminal-placeholder {
  color: var(--text-dim);
  font-style: italic;
}

/* Terminal Line Formatting */
.log-line-send { color: #38bdf8; }
.log-line-recv { color: #34d399; }
.log-line-info { color: #94a3b8; }
.log-line-err { color: #f87171; font-weight: 700; }
.log-badge-protected {
  background: var(--amber-dim);
  color: var(--amber);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.75rem;
  font-weight: 700;
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 0.6s linear infinite;
}

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

/* Anti-Bot Honeypot (Hidden) */
.honeypot-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

/* Footer */
.app-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding: 1.5rem 1rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.app-footer a {
  color: var(--cyan);
  text-decoration: none;
}

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