:root {
  --bg-primary: #0b141a;
  --bg-surface: #111b21;
  --bg-card: #202c33;
  --bg-card-hover: #222e35;
  --bg-input: #2a3942;
  --border-subtle: #222d34;
  --text-primary: #e9edef;
  --text-secondary: #8696a0;
  --brand-green: #00a884;
  --brand-green-hover: #06cf9c;
  --brand-green-dark: #005c4b;
  --accent-red: #ef4444;
  --accent-red-bg: rgba(239, 68, 68, 0.12);
  --accent-blue: #38bdf8;
  --accent-blue-bg: rgba(56, 189, 248, 0.12);
  --accent-yellow: #facc15;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0;
  overflow-x: hidden;
}

/* Header */
.app-header {
  width: 100%;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 16px;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
}

.header-container {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0, 168, 132, 0.3);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 700;
  background: var(--brand-green);
  color: var(--bg-surface);
  padding: 2px 7px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

/* PWA Install Banner */
.install-banner {
  display: none;
  background: linear-gradient(90deg, #005c4b, #00a884);
  color: #fff;
  padding: 8px 14px;
  font-size: 0.8rem;
  width: 100%;
  text-align: center;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

.install-btn {
  background: #fff;
  color: #005c4b;
  border: none;
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.75rem;
  cursor: pointer;
}

/* Main Container */
.main-wrapper {
  width: 100%;
  max-width: 640px;
  padding: 16px 14px 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Explanatory intro */
.intro-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--text-secondary);
}

.intro-card strong {
  color: var(--brand-green);
}

/* Input Area */
.input-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.input-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.message-textarea {
  width: 100%;
  min-height: 96px;
  background: var(--bg-input);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: #fff;
  font-size: 0.95rem;
  line-height: 1.4;
  padding: 12px 14px;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s;
}

.message-textarea:focus {
  border-color: var(--brand-green);
}

.message-textarea::placeholder {
  color: #8696a0;
  font-size: 0.85rem;
}

/* Quick samples */
.samples-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.sample-chip {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: #aebac1;
  padding: 6px 10px;
  border-radius: 16px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.sample-chip:hover {
  background: var(--bg-card-hover);
  border-color: var(--brand-green);
  color: var(--brand-green);
}

/* Audio input option */
.audio-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--bg-card);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
}

.audio-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  transition: background 0.2s;
}

.audio-btn.recording {
  background: var(--accent-red);
  color: #fff;
  border-color: var(--accent-red);
  animation: pulse 1s infinite;
}

/* Submit Button */
.submit-btn {
  background: var(--brand-green);
  color: #111b21;
  border: none;
  border-radius: var(--radius-md);
  padding: 14px 20px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.2s, transform 0.1s;
  box-shadow: 0 4px 12px rgba(0, 168, 132, 0.25);
}

.submit-btn:hover {
  background: var(--brand-green-hover);
}

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

.submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Loading State */
.loading-box {
  display: none;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(0, 168, 132, 0.2);
  border-top-color: var(--brand-green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Results section */
.results-wrapper {
  display: none;
  flex-direction: column;
  gap: 14px;
  animation: fadeIn 0.3s ease;
}

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

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow-sm);
}

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

.card-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Warning Card (Evite) */
.card-evite {
  border-left: 4px solid var(--accent-red);
  background: #18191f;
}

.card-evite .card-tag {
  background: var(--accent-red-bg);
  color: var(--accent-red);
}

.evite-text {
  font-size: 0.9rem;
  line-height: 1.45;
  color: #fca5a5;
  font-weight: 500;
}

/* Option Cards (WhatsApp Bubble) */
.card-option {
  border-left: 4px solid var(--brand-green);
}

.card-option .card-tag {
  background: rgba(0, 168, 132, 0.15);
  color: var(--brand-green);
}

.bubble-content {
  background: var(--bg-card);
  padding: 14px;
  border-radius: var(--radius-md);
  border-top-left-radius: 2px;
  font-size: 0.93rem;
  line-height: 1.5;
  color: var(--text-primary);
  white-space: pre-wrap;
}

/* Audio Card */
.card-audio {
  border-left: 4px solid var(--accent-blue);
}

.card-audio .card-tag {
  background: var(--accent-blue-bg);
  color: var(--accent-blue);
}

/* Action Buttons within cards */
.card-actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.btn-action {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s;
}

.btn-action:hover {
  background: var(--bg-card-hover);
  border-color: var(--brand-green);
  color: var(--brand-green);
}

.btn-action.copied {
  background: var(--brand-green);
  color: #111b21;
  border-color: var(--brand-green);
}

.btn-share {
  background: var(--brand-green-dark);
  color: #fff;
  border: none;
}

.btn-share:hover {
  background: var(--brand-green);
  color: #111b21;
}

/* Disclaimer / Legal footer */
.legal-footer {
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin-top: 20px;
  padding: 12px;
}

/* Toast message */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--brand-green);
  color: #111b21;
  padding: 10px 20px;
  border-radius: 24px;
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: var(--shadow-md);
  transition: transform 0.25s ease;
  z-index: 100;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}