/* ========== Crontab Generator ========== */
.cron-container { max-width: 1100px; margin: 0 auto; padding: 24px; }
.cron-header { text-align: center; margin-bottom: 20px; }
.cron-header h1 { font-size: 28px; font-weight: 800; color: var(--color-heading); margin-bottom: 6px; }
.cron-header .cron-desc { font-size: 14px; color: var(--color-muted); max-width: 600px; margin: 0 auto; line-height: 1.5; }

/* Format Tabs */
.format-tabs { display: flex; gap: 6px; margin-bottom: 16px; }
.format-tab { padding: 8px 20px; font-size: 13px; font-weight: 600; border: 1px solid var(--color-border); border-radius: 6px; background: #fff; color: var(--color-text); cursor: pointer; transition: all 0.15s; }
.format-tab:hover { background: #f0f4ff; border-color: var(--color-primary); }
.format-tab.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* Expression Box */
.expr-box { background: #fff; border: 1px solid var(--color-border); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.expr-input-row { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; }
.expr-input { flex: 1; padding: 10px 14px; font-size: 15px; font-family: 'Consolas', monospace; border: 1.5px solid var(--color-border); border-radius: 6px; background: #fff; color: var(--color-text); outline: none; transition: border-color 0.15s; }
.expr-input:focus { border-color: var(--color-primary); }
.copy-btn { padding: 10px 18px; font-size: 13px; font-weight: 600; border: none; border-radius: 6px; background: var(--color-primary); color: #fff; cursor: pointer; white-space: nowrap; transition: all 0.15s; }
.copy-btn:hover { opacity: 0.9; }
.expr-desc { padding: 10px 14px; background: #f0f9ff; border-radius: 6px; font-size: 13px; color: #1e40af; min-height: 36px; display: flex; align-items: center; gap: 6px; }
.expr-desc.error { background: #fef2f2; color: #dc2626; }

/* Builder Section */
.builder-section { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
@media (max-width: 900px) { .builder-section { grid-template-columns: 1fr; } }

.builder-panel, .preview-panel { background: #fff; border: 1px solid var(--color-border); border-radius: 10px; padding: 16px; }
.builder-title, .preview-title { font-size: 14px; font-weight: 700; color: var(--color-heading); margin-bottom: 12px; }

.field-grid { display: grid; gap: 10px; }
.field-item { display: grid; grid-template-columns: 70px 1fr; gap: 10px; align-items: center; }
.field-label { font-size: 13px; font-weight: 600; color: var(--color-text); }
.field-input { padding: 8px 10px; font-size: 13px; font-family: 'Consolas', monospace; border: 1.5px solid var(--color-border); border-radius: 6px; background: #fff; color: var(--color-text); outline: none; transition: border-color 0.15s; }
.field-input:focus { border-color: var(--color-primary); }
.field-hint { font-size: 11px; color: var(--color-muted); margin-top: 2px; }

/* Preview */
.timezone-row { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; }
.timezone-label { font-size: 13px; font-weight: 500; color: var(--color-text); white-space: nowrap; }
.timezone-select { flex: 1; padding: 6px 10px; font-size: 13px; border: 1.5px solid var(--color-border); border-radius: 6px; background: #fff; color: var(--color-text); cursor: pointer; outline: none; }

.exec-list { display: flex; flex-direction: column; gap: 6px; max-height: 250px; overflow-y: auto; }
.exec-item { padding: 8px 12px; background: #f8fafc; border-radius: 6px; font-size: 13px; font-family: 'Consolas', monospace; color: #1e40af; }

/* Collapsible Sections */
.collapsible-section { margin-bottom: 12px; border: 1px solid var(--color-border); border-radius: 10px; overflow: hidden; }
.collapsible-header { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; background: #fff; cursor: pointer; font-size: 14px; font-weight: 600; color: var(--color-heading); user-select: none; transition: background 0.15s; }
.collapsible-header:hover { background: #f8fafc; }
.collapsible-arrow { font-size: 12px; transition: transform 0.2s; }
.collapsible-arrow.open { transform: rotate(180deg); }
.collapsible-body { display: none; padding: 16px; background: #fff; }
.collapsible-body.open { display: block; }

/* Presets */
.presets-category { margin-bottom: 12px; }
.presets-category-title { font-size: 13px; font-weight: 600; color: var(--color-heading); margin-bottom: 8px; padding-bottom: 4px; border-bottom: 1px solid var(--color-border); }
.presets-grid { display: flex; flex-wrap: wrap; gap: 6px; }
.preset-btn { padding: 6px 12px; font-size: 12px; border: 1px solid var(--color-border); border-radius: 4px; background: #fff; color: var(--color-text); cursor: pointer; transition: all 0.15s; }
.preset-btn:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* Symbol Panel */
.symbol-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 8px; }
.symbol-item { padding: 10px; background: #f8fafc; border-radius: 6px; border: 1px solid var(--color-border); cursor: pointer; transition: all 0.15s; }
.symbol-item:hover { background: #f0f4ff; border-color: var(--color-primary); }
.symbol-char { font-size: 20px; font-weight: 700; color: var(--color-primary); font-family: 'Consolas', monospace; margin-bottom: 4px; }
.symbol-meaning { font-size: 12px; color: var(--color-text); margin-bottom: 2px; }
.symbol-example { font-size: 11px; color: var(--color-muted); font-family: 'Consolas', monospace; }

/* Validation */
.validation-errors { background: #fef2f2; border-radius: 8px; padding: 12px; margin-top: 12px; border-left: 3px solid #dc2626; }
.validation-title { font-size: 13px; font-weight: 700; color: #dc2626; margin-bottom: 8px; }
.error-item { padding: 6px 10px; background: rgba(255,255,255,0.6); border-radius: 4px; margin-bottom: 4px; font-size: 13px; color: #dc2626; }

/* Toast */
.toast { position: fixed; top: 20px; right: 20px; padding: 12px 20px; background: #10b981; color: #fff; border-radius: 8px; font-size: 13px; font-weight: 600; z-index: 10000; }

/* Responsive */
@media (max-width: 768px) {
  .cron-container { padding: 12px; }
  .cron-header h1 { font-size: 22px; }
  .expr-input-row { flex-direction: column; }
  .copy-btn { width: 100%; }
  .field-item { grid-template-columns: 1fr; gap: 4px; }
}