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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.5;
  min-height: 100vh;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a {
  color: var(--primary);
}

.app-shell {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 16px 48px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 8px;
}

.app-header .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--text);
}

.app-header .brand .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
  flex-shrink: 0;
}

.app-nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.icon-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.icon-btn:hover {
  border-color: var(--primary);
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 16px;
}

.card h1,
.card h2,
.card h3 {
  margin-top: 0;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tab-btn {
  flex: 1;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
}

.tab-btn[aria-selected="true"] {
  background: var(--primary);
  color: var(--primary-contrast);
  border-color: var(--primary);
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

/* Form elements */
textarea,
input[type="text"] {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
}

textarea:focus,
input[type="text"]:focus {
  outline: none;
  border-color: var(--primary);
}

textarea {
  min-height: 120px;
}

label.field-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
}

.field {
  margin-bottom: 14px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 12px;
  padding: 13px 18px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-row {
  display: flex;
  gap: 10px;
}

.btn-row .btn {
  width: auto;
  flex: 1;
}

/* Image attach */
.image-attach {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.image-attach .file-btn {
  border: 1px dashed var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 0.9rem;
}

.image-preview {
  display: none;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.image-preview.active {
  display: flex;
}

.image-preview img {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.image-preview button {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 0.8rem;
}

/* Result / decrypted view */
.result-link {
  display: block;
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
  word-break: break-all;
  margin-bottom: 10px;
}

.alias-chip {
  display: inline-block;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 0.8rem;
  color: var(--secondary);
  font-weight: 700;
  letter-spacing: 0.03em;
}

.secret-text {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  margin: 10px 0;
}

.secret-image {
  max-width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
  margin: 10px 0;
}

.countdown-banner {
  background: var(--surface-2);
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.85rem;
  margin: 10px 0;
  font-weight: 600;
}

.destroyed-banner {
  color: var(--danger);
  font-weight: 700;
  margin: 10px 0;
}

/* Status text */
.status-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.status-text.success {
  color: var(--success);
}

.status-text.error {
  color: var(--danger);
}

/* Toast / snackbar */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 12px);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 10px;
  font-size: 0.9rem;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 100;
  max-width: 90vw;
  text-align: center;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* Grids: language / theme pickers */
.picker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}

.picker-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font: inherit;
}

.picker-item[aria-pressed="true"] {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary) inset;
}

.picker-item .swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.picker-item .names {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.picker-item .native-name {
  font-weight: 600;
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.picker-item .english-name {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-q {
  font-weight: 700;
  margin: 0 0 6px;
}

.faq-a {
  margin: 0;
  color: var(--text-muted);
}

/* Footer */
.app-footer {
  margin-top: auto;
  padding-top: 24px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.app-footer a {
  color: var(--text-muted);
}

.hidden {
  display: none !important;
}

@media (max-width: 420px) {
  .app-header {
    flex-wrap: wrap;
  }
}

/* Hero Section */
.hero-section {
  text-align: center;
  margin-bottom: 24px;
}

.hero-section h1 {
  font-size: 1.5rem;
  margin: 0 0 8px;
}

.hero-section .subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  margin: 0;
}

/* Trust Indicators */
.trust-indicators {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}

.trust-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.trust-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.trust-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.trust-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}