/* ── Variables ───────────────────────────────────────── */
:root {
  --color-primary: #4F46E5;
  --color-primary-hover: #4338CA;
  --color-primary-light: #EEF2FF;
  --color-primary-subtle: #F5F7FF;
  --color-bg-main: #F9FAFB;
  --color-bg-card: #FFFFFF;
  --color-text-main: #111827;
  --color-text-muted: #6B7280;
  --color-border: #E5E7EB;
  --color-warning-bg: #FFFBEB;
  --color-warning-text: #92400E;
  --color-warning-border: #FCD34D;
  --color-error-bg: #FEF2F2;
  --color-error-text: #DC2626;
  --color-error-border: #FECACA;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--color-bg-main);
  color: var(--color-text-main);
  margin: 0;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button { font-family: inherit; }

/* ── Layout ──────────────────────────────────────────── */
.container {
  max-width: 48rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ── Header ──────────────────────────────────────────── */
.site-header {
  padding-top: 3rem;
  padding-bottom: 3rem;
  text-align: center;
}

.brand-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0;
  color: var(--color-text-main);
}

.brand-tagline {
  margin-top: 0.75rem;
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* ── Main card ───────────────────────────────────────── */
.main-card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 2rem;
  border: 1px solid var(--color-border);
}

/* ── Form ────────────────────────────────────────────── */
.input-group {
  position: relative;
  display: flex;
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-md);
}

.main-input {
  flex: 1;
  display: block;
  width: 100%;
  padding: 1rem 1.25rem;
  font-size: 1.125rem;
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-right: none;
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
  outline: none;
  background: var(--color-bg-card);
  color: var(--color-text-main);
  transition: border-color 0.15s ease-in-out;
}

.main-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
  z-index: 10;
}

.translate-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: white;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  border: 1px solid var(--color-primary);
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s ease-in-out;
  white-space: nowrap;
}

.translate-btn:hover {
  background: linear-gradient(135deg, #6366F1, var(--color-primary));
  border-color: var(--color-primary-hover);
  transform: scale(1.02);
}

/* ── HTMX loading indicator ──────────────────────────── */
.htmx-indicator {
  display: none;
}

.htmx-request.htmx-indicator {
  display: inline-block;
  animation: spin 0.8s linear infinite;
}

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

/* ── Strict mode toggle ──────────────────────────────── */
.options-row {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-top: 1rem;
}

.toggle-label {
  display: flex;
  align-items: center;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  gap: 0;
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 2.75rem;
  height: 1.5rem;
  margin-right: 0.75rem;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-border);
  transition: 0.3s;
  border-radius: 1.5rem;
}

.slider:before {
  position: absolute;
  content: "";
  height: 1.125rem;
  width: 1.125rem;
  left: 0.1875rem;
  bottom: 0.1875rem;
  background-color: white;
  transition: 0.3s;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

input:checked + .slider {
  background-color: var(--color-primary);
}

input:checked + .slider:before {
  transform: translateX(1.25rem);
}

.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  margin-left: 0.5rem;
  border-radius: 50%;
  background-color: var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: bold;
  cursor: help;
  flex-shrink: 0;
  position: relative;
}

.help-icon[data-help]:hover::after {
  content: attr(data-help);
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  width: 16rem;
  padding: 0.5rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1.4;
  white-space: normal;
  color: var(--color-text-main);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  pointer-events: none;
  z-index: 30;
  opacity: 0;
  animation: helpTipIn 0.15s ease-out forwards;
}

@keyframes helpTipIn {
  to { opacity: 1; }
}

/* ── Result section ──────────────────────────────────── */
#result-section {
  margin-top: 2rem;
  border-top: 1px solid var(--color-border);
  padding-top: 2rem;
  display: none;
}

#result-section.has-content {
  display: block;
}

/* ── Section labels ──────────────────────────────────── */
.section-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

/* ── Result header ───────────────────────────────────── */
.result-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.result-value {
  font-size: 1.875rem;
  font-weight: 700;
  font-family: monospace;
  margin: 0;
  line-height: 1.2;
  word-break: break-all;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s ease-in-out;
}

.copy-btn:hover {
  background-color: var(--color-bg-main);
  color: var(--color-text-main);
}

/* ── Warning box ─────────────────────────────────────── */
.warning-box {
  display: flex;
  align-items: flex-start;
  padding: 1rem;
  margin-top: 1.5rem;
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-md);
  color: var(--color-warning-text);
  font-size: 0.875rem;
}

.warning-icon {
  margin-right: 0.75rem;
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* ── Cron breakdown ──────────────────────────────────── */
.cron-breakdown {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2rem;
  gap: 0.75rem;
}

.cron-field {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem 0.5rem;
  background-color: var(--color-bg-main);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all 0.2s ease-in-out;
  min-width: 0;
}

.cron-field.active {
  border-color: #A5B4FC;
  background-color: var(--color-primary-light);
}

.field-value {
  font-size: 1.375rem;
  font-weight: 700;
  font-family: monospace;
  color: var(--color-text-main);
  word-break: break-all;
  text-align: center;
}

.cron-field.active .field-value {
  color: var(--color-primary);
}

.field-label {
  margin-top: 0.5rem;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.2;
}

.cron-field.active .field-label {
  color: var(--color-primary);
}

/* ── Next runs ───────────────────────────────────────── */
.next-runs-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: monospace;
  font-size: 0.9rem;
  color: var(--color-text-main);
}

.next-runs-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.next-runs-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--color-border);
  border-radius: 50%;
}

.next-runs-list li:first-child::before {
  background-color: var(--color-primary);
}

/* ── Error message ───────────────────────────────────── */
.error-message {
  color: var(--color-error-text);
  font-weight: 500;
  padding: 1rem;
  background-color: var(--color-error-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-error-border);
}

/* ── Example chips ───────────────────────────────────── */
.examples-container {
  margin-top: 3rem;
}

.chips-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.example-chip {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-main);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.3s ease-in-out;
  box-shadow: var(--shadow-sm);
}

.example-chip:hover {
  background-color: var(--color-primary-subtle);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ── Section label with icon ─────────────────────────── */
.section-label svg {
  vertical-align: -0.15em;
  margin-right: 0.35rem;
  opacity: 0.6;
}

.section-label-spaced {
  margin-top: 2rem;
}

/* ── Cron field hover tint ───────────────────────────── */
.cron-field:hover {
  background-color: var(--color-primary-subtle);
}

/* ── Result fade-in ──────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

#result-content > * {
  animation: fadeIn 0.4s ease-out;
}

/* ── Footer ──────────────────────────────────────────── */
.site-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  padding-bottom: 3rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.site-footer a {
  color: var(--color-text-main);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s;
}

.site-footer a:hover {
  text-decoration: underline;
  color: var(--color-primary);
}

.footer-links {
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* ── Theme toggle button ─────────────────────────────── */
.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.4rem;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: color 0.15s, border-color 0.15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
}

.theme-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  width: 1.25rem;
  height: 1.25rem;
}

/* Show sun in dark mode, moon in light mode */
.theme-toggle .icon-sun  { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="dark"] .theme-toggle .icon-sun  { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* Auto-detect: hide the correct icon when no explicit theme is set */
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) .theme-toggle .icon-sun  { display: block; }
  html:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

/* ── Dark mode overrides ─────────────────────────────── */
[data-theme="dark"] {
  --color-primary: #818CF8;
  --color-primary-hover: #6366F1;
  --color-primary-light: #1E1B4B;
  --color-primary-subtle: #1E1B4B;
  --color-bg-main: #111827;
  --color-bg-card: #1F2937;
  --color-text-main: #F3F4F6;
  --color-text-muted: #9CA3AF;
  --color-border: #374151;
  --color-warning-bg: #422006;
  --color-warning-text: #FCD34D;
  --color-warning-border: #92400E;
  --color-error-bg: #450a0a;
  --color-error-text: #FCA5A5;
  --color-error-border: #7F1D1D;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .translate-btn {
  background: linear-gradient(135deg, #6366F1, #4F46E5);
  border-color: #6366F1;
}

[data-theme="dark"] .translate-btn:hover {
  background: linear-gradient(135deg, #818CF8, #6366F1);
}

[data-theme="dark"] .cron-field.active {
  border-color: #4338CA;
}

[data-theme="dark"] .slider:before {
  background-color: var(--color-bg-main);
}

/* Auto-detect for users without an explicit theme choice */
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --color-primary: #818CF8;
    --color-primary-hover: #6366F1;
    --color-primary-light: #1E1B4B;
    --color-primary-subtle: #1E1B4B;
    --color-bg-main: #111827;
    --color-bg-card: #1F2937;
    --color-text-main: #F3F4F6;
    --color-text-muted: #9CA3AF;
    --color-border: #374151;
    --color-warning-bg: #422006;
    --color-warning-text: #FCD34D;
    --color-warning-border: #92400E;
    --color-error-bg: #450a0a;
    --color-error-text: #FCA5A5;
    --color-error-border: #7F1D1D;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  }

  html:not([data-theme="light"]) .translate-btn {
    background: linear-gradient(135deg, #6366F1, #4F46E5);
    border-color: #6366F1;
  }

  html:not([data-theme="light"]) .translate-btn:hover {
    background: linear-gradient(135deg, #818CF8, #6366F1);
  }

  html:not([data-theme="light"]) .cron-field.active {
    border-color: #4338CA;
  }

  html:not([data-theme="light"]) .slider:before {
    background-color: var(--color-bg-main);
  }

}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 560px) {
  .main-card {
    padding: 1.25rem;
  }

  .input-group {
    flex-direction: column;
  }

  .main-input {
    border-right: 1px solid var(--color-border);
    border-bottom: none;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
  }

  .translate-btn {
    justify-content: center;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
  }

  .result-header {
    flex-direction: column;
  }

  .cron-breakdown {
    gap: 0.4rem;
  }

  .field-value {
    font-size: 1rem;
  }

}