/* ============================================================
   CronParser – styles.css
   Dark-first, responsive, accessible
   ============================================================ */

:root {
  --bg:         #0f0f14;
  --bg2:        #16161e;
  --surface:    #1e1e2a;
  --surface2:   #262634;
  --border:     #2c2c3e;
  --text:       #e2e2f0;
  --text-muted: #7878a0;
  --text-dim:   #505068;

  --accent:     #6366f1;
  --accent-h:   #818cf8;
  --accent-bg:  rgba(99,102,241,0.12);

  --success:    #22c55e;
  --error:      #ef4444;
  --warning:    #f59e0b;

  /* Field colors */
  --c-minute:   #60a5fa;
  --c-hour:     #34d399;
  --c-dom:      #fb923c;
  --c-month:    #c084fc;
  --c-dow:      #f87171;

  --radius:     8px;
  --radius-lg:  14px;
  --shadow:     0 2px 16px rgba(0,0,0,0.4);
  --transition: 180ms ease;

  --max-width:  780px;
}

/* Light theme */
[data-theme="light"] {
  --bg:         #f4f4f8;
  --bg2:        #ebebf2;
  --surface:    #ffffff;
  --surface2:   #f0f0f8;
  --border:     #d4d4e8;
  --text:       #1a1a2e;
  --text-muted: #6060a0;
  --text-dim:   #a0a0c0;
  --accent-bg:  rgba(99,102,241,0.1);
  --shadow:     0 2px 16px rgba(0,0,0,0.1);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  font-size: 15px;
}

/* ---- Header ---- */
header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: baseline;
  gap: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.3px;
}
.logo-app {
  color: var(--accent-h);
  text-decoration: none;
  transition: color var(--transition);
}
.logo-app:hover { color: var(--accent); }
.logo-sep {
  color: var(--text-dim);
}
.logo-domain {
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition);
}
.logo-domain:hover { color: var(--text); }
.header-actions {
  display: flex;
  gap: 4px;
}

/* ---- Main layout ---- */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px 60px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ---- Card ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
}

/* ---- Hero ---- */
.hero {
  text-align: center;
  padding: 8px 0 4px;
}
.hero h1 {
  font-size: clamp(20px, 4vw, 28px);
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text);
}
.tagline {
  color: var(--text-muted);
  margin-top: 6px;
  font-size: 14px;
}

/* ---- Input section ---- */
.cron-input-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 4px 4px 16px;
  transition: border-color var(--transition);
}
.cron-input-wrapper:focus-within {
  border-color: var(--accent);
}
.cron-input-wrapper.error {
  border-color: var(--error);
}
.cron-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 2px;
  min-width: 0;
}
.cron-input::placeholder { color: var(--text-dim); }
.input-buttons {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
}

/* ---- Field tags ---- */
.field-tags {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.field-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  user-select: none;
}
.field-tag:hover { opacity: 0.85; transform: translateY(-1px); }
.field-name {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.7;
}
.field-val {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 13px;
}
.f-minute { background: rgba(96,165,250,0.15); color: var(--c-minute); border-color: rgba(96,165,250,0.3); }
.f-hour   { background: rgba(52,211,153,0.15); color: var(--c-hour);   border-color: rgba(52,211,153,0.3); }
.f-dom    { background: rgba(251,146,60,0.15);  color: var(--c-dom);    border-color: rgba(251,146,60,0.3); }
.f-month  { background: rgba(192,132,252,0.15); color: var(--c-month);  border-color: rgba(192,132,252,0.3); }
.f-dow    { background: rgba(248,113,113,0.15); color: var(--c-dow);    border-color: rgba(248,113,113,0.3); }
.field-tag.active { box-shadow: 0 0 0 2px currentColor; }

/* ---- Validation ---- */
.validation-msg {
  margin-top: 10px;
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: 13px;
  background: rgba(239,68,68,0.1);
  color: var(--error);
  border: 1px solid rgba(239,68,68,0.3);
}
.validation-msg.hidden { display: none; }

/* ---- Description ---- */
.description-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
}
.desc-icon { font-size: 28px; flex-shrink: 0; }
.desc-text {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}
.desc-text.error { color: var(--error); font-size: 14px; font-weight: 400; }
.desc-actions { flex-shrink: 0; }

/* ---- Presets ---- */
.presets h3 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.presets-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.preset-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.preset-btn:hover {
  border-color: var(--accent);
  color: var(--accent-h);
  background: var(--accent-bg);
}
.preset-expr {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
  display: block;
  margin-top: 1px;
}

/* ---- Tabs ---- */
.panel-tabs {
  display: flex;
  gap: 4px;
  padding: 0 2px;
}
.tab {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 8px 18px;
  border-radius: var(--radius) var(--radius) 0 0;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
  border-bottom: none;
  position: relative;
  bottom: -1px;
}
.tab:hover { color: var(--text); border-color: var(--border); }
.tab.active {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  font-weight: 600;
}
.panel-content {
  display: none;
  border-radius: 0 var(--radius-lg) var(--radius-lg) var(--radius-lg);
  border-top-left-radius: 0;
}
.panel-content.active { display: block; }

/* ---- Builder ---- */
.builder-hint {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
  padding: 8px 12px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.builder-fields {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.builder-field {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}
.builder-field.active { border-color: var(--accent); }
.builder-field-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg);
  cursor: pointer;
  user-select: none;
}
.builder-field-header:hover { background: var(--surface2); }
.field-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.field-color-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.field-header-name {
  font-weight: 600;
  font-size: 14px;
}
.field-header-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--surface2);
  padding: 2px 8px;
  border-radius: 4px;
}
.field-chevron {
  color: var(--text-dim);
  transition: transform var(--transition);
  font-size: 12px;
}
.field-range {
  font-size: 11px;
  color: var(--text-dim);
}
.builder-field.open .field-chevron { transform: rotate(180deg); }
.builder-field-body {
  display: none;
  padding: 14px;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.builder-field.open .builder-field-body { display: block; }

.field-mode-row {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.mode-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition);
}
.mode-btn.active {
  background: var(--accent-bg);
  border-color: var(--accent);
  color: var(--accent-h);
}

.value-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 8px;
}
.val-btn {
  min-width: 34px;
  height: 34px;
  padding: 0 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.val-btn:hover { border-color: currentColor; }
.val-btn.selected {
  border-color: currentColor;
  font-weight: 700;
}
.val-btn.named { font-family: inherit; font-size: 11px; min-width: 42px; }

.step-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}
.step-row label { font-size: 13px; color: var(--text-muted); }
.step-input {
  width: 80px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 5px 10px;
  font-size: 14px;
  font-family: 'JetBrains Mono', monospace;
}
.step-input:focus { outline: none; border-color: var(--accent); }

.range-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}
.range-row label { font-size: 13px; color: var(--text-muted); }
.range-input {
  width: 70px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 5px 10px;
  font-size: 14px;
  font-family: 'JetBrains Mono', monospace;
}
.range-input:focus { outline: none; border-color: var(--accent); }

/* ---- Saved ---- */
.saved-list { display: flex; flex-direction: column; gap: 8px; }
.saved-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.saved-item:hover { border-color: var(--accent); }
.saved-expr {
  font-family: 'JetBrains Mono', monospace;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  flex-shrink: 0;
}
.saved-desc {
  flex: 1;
  font-size: 13px;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.saved-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}
.empty-state {
  text-align: center;
  padding: 32px;
  color: var(--text-muted);
}
.empty-icon { font-size: 32px; margin-bottom: 8px; opacity: 0.4; }
.empty-hint { font-size: 13px; margin-top: 6px; color: var(--text-dim); }

/* ---- Advanced ---- */
.advanced-panel h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-muted);
}
.advanced-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 520px) {
  .advanced-grid { grid-template-columns: 1fr; }
}
.adv-group { display: flex; flex-direction: column; gap: 8px; }
.adv-group label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.adv-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: var(--accent-h);
  font-weight: 600;
}
.adv-group select, .adv-group input[type="range"] {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 7px 10px;
  font-size: 14px;
  outline: none;
  width: 100%;
  cursor: pointer;
}
.adv-group select:focus { border-color: var(--accent); }
.adv-group input[type="range"] {
  padding: 4px 0;
  accent-color: var(--accent);
}
.adv-buttons { display: flex; flex-wrap: wrap; gap: 8px; }
.adv-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ---- Buttons ---- */
.btn-icon {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: all var(--transition);
}
.btn-icon:hover {
  background: var(--surface2);
  border-color: var(--border);
  color: var(--text);
}
.btn-clear:hover { color: var(--error); border-color: var(--error); }
.btn-text {
  background: transparent;
  border: none;
  color: var(--accent-h);
  font-size: 13px;
  cursor: pointer;
  padding: 4px 0;
  transition: color var(--transition);
}
.btn-text:hover { color: var(--accent); }
.btn-secondary {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent-h); }
.btn-danger {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  color: var(--error);
  padding: 6px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-danger:hover { background: rgba(239,68,68,0.2); }
.btn-sm {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  padding: 3px 8px;
  border-radius: 5px;
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-sm:hover { color: var(--text); border-color: var(--border); }
.btn-sm.danger:hover { color: var(--error); border-color: var(--error); }

/* ---- Modal ---- */
.explain-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.explain-modal.hidden { display: none; }
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
}
.modal-box {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 580px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
  animation: slideUp 0.2s ease;
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-close:hover { background: var(--surface2); color: var(--text); }
.modal-box h3 { font-size: 18px; margin-bottom: 16px; }
.modal-content { font-size: 14px; line-height: 1.7; color: var(--text-muted); }
.modal-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
}
.modal-content th, .modal-content td {
  text-align: left;
  padding: 8px 12px;
  border: 1px solid var(--border);
  font-size: 13px;
}
.modal-content th {
  background: var(--surface2);
  font-weight: 600;
  color: var(--text);
}
.modal-content code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--accent-h);
}

/* ---- Toast ---- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 20px;
  border-radius: 30px;
  font-size: 14px;
  box-shadow: var(--shadow);
  z-index: 2000;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.toast.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(16px);
  pointer-events: none;
}

/* ---- Utilities ---- */
.hidden { display: none !important; }
a { text-decoration: none; }

/* ---- Responsive ---- */
@media (max-width: 520px) {
  main { padding: 16px 12px 40px; gap: 12px; }
  .cron-input { font-size: 18px; letter-spacing: 1.5px; }
  .desc-text { font-size: 15px; }
  .field-tags { gap: 6px; }
  .field-tag { padding: 3px 8px; }
}