/* ========================================================================
   CRON EXPRESSION BUILDER — DESIGN SYSTEM
   Based on EXAMPLE_FOR_ALL.css · Target: RO / DACH / EN
   No gradients — solid flat colors only
   ======================================================================== */

/* 1. VARIABLES & THEME =================================================== */
:root {
--bg-page: #F8FAFC;
--bg-card: #FFFFFF;
--bg-surface: #F1F5F9;
--text-primary: #0F172A;
--text-secondary: #475569;
--text-muted: #94A3B8;
--accent: #2563EB;
--accent-hover: #1D4ED8;
--accent-light: #DBEAFE;
--warm: #D97706;
--success: #10B981;
--success-light: #D1FAE5;
--error: #EF4444;
--error-light: #FEE2E2;
--border: #E2E8F0;
--shadow-sm: 0 1px 3px rgba(15,23,42,0.08);
--shadow-md: 0 4px 12px rgba(15,23,42,0.12);
--focus-ring: 0 0 0 3px rgba(37,99,235,0.25);
--space-xs: 0.25rem;
--space-sm: 0.5rem;
--space-md: 1rem;
--space-lg: 1.5rem;
--space-xl: 2rem;
--space-2xl: 3rem;
--radius: 12px;
--radius-sm: 8px;
--max-width: 1200px;
--header-height: 64px;
--font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
--text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
--text-sm: clamp(0.8125rem, 0.75rem + 0.3vw, 0.9375rem);
--text-base: clamp(0.875rem, 0.8rem + 0.3vw, 1rem);
--text-lg: clamp(1rem, 0.9rem + 0.4vw, 1.125rem);
--text-xl: clamp(1.25rem, 1rem + 1vw, 1.5rem);
--text-2xl: clamp(1.5rem, 1.2rem + 1.2vw, 1.875rem);
--text-3xl: clamp(1.875rem, 1.5rem + 1.5vw, 2.25rem);
--ease: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
--ease-slow: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
@media (prefers-color-scheme: dark) {
:root {
--bg-page: #0B1120; --bg-card: #111827; --bg-surface: #1E293B;
--text-primary: #F1F5F9; --text-secondary: #CBD5E1; --text-muted: #64748B;
--accent-light: #1E3A5F; --success-light: #064E3B; --error-light: #7F1D1D;
--border: #334155;
--shadow-sm: 0 1px 3px rgba(0,0,0,0.3); --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
}
}
html.theme-dark {
--bg-page: #0B1120; --bg-card: #111827; --bg-surface: #1E293B;
--text-primary: #F1F5F9; --text-secondary: #CBD5E1; --text-muted: #64748B;
--accent-light: #1E3A5F; --success-light: #064E3B; --error-light: #7F1D1D;
--border: #334155;
--shadow-sm: 0 1px 3px rgba(0,0,0,0.3); --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
}

/* 2. BASE & RESET ======================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; text-rendering: optimizeLegibility; font-feature-settings: "kern" 1, "liga" 1; }
body { font-family: var(--font-sans); background: var(--bg-page); color: var(--text-primary); line-height: 1.5; -webkit-font-smoothing: antialiased; min-height: 100vh; display: flex; flex-direction: column; }
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font: inherit; }
ul, ol { list-style: none; }

/* 3. LAYOUT & CONTAINERS ================================================ */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding-inline: var(--space-lg); }
.site-header { position: sticky; top: 0; z-index: 50; height: var(--header-height); background: var(--bg-card); border-bottom: 1px solid var(--border); display: flex; align-items: center; }
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo { display: inline-flex; align-items: center; gap: var(--space-sm); color: var(--text-primary); font-size: var(--text-lg); line-height: 1.2; transition: opacity var(--ease); }
.logo:hover { opacity: 0.9; }
.logo-img { width: 32px; height: 32px; flex-shrink: 0; display: block; border-radius: var(--radius-sm); }
.logo strong { font-weight: 700; letter-spacing: -0.02em; }
main { flex: 1; padding-block: var(--space-2xl); }

/* 4. TYPOGRAPHY & UTILITIES ============================================= */
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.2; font-weight: 600; }
h1 { font-size: var(--text-3xl); margin-bottom: var(--space-md); }
h2 { font-size: var(--text-2xl); margin-bottom: var(--space-lg); }
h3 { font-size: var(--text-xl); }
.text-center { text-align: center; }
.text-muted  { color: var(--text-muted); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* 5. COMPONENTS ========================================================= */
/* Language Switcher */
.lang-switch { display: inline-flex; background: var(--bg-surface); padding: 4px; border-radius: 999px; gap: 4px; align-items: center; width: auto; }
.lang-btn { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px; font-size: var(--text-sm); font-weight: 500; color: var(--text-secondary); background: transparent; border: none; transition: all 0.2s ease; white-space: nowrap; cursor: pointer; }
.lang-btn:hover { color: var(--text-primary); }
.lang-btn.active { background: var(--bg-card); color: var(--accent); font-weight: 600; box-shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06); }

/* Theme Toggle */
.theme-toggle { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--border); background: var(--bg-surface); display: grid; place-items: center; font-size: 1.1rem; }

/* Tool Card */
.tool-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--space-lg); box-shadow: var(--shadow-sm); transition: var(--ease-slow); display: flex; flex-direction: column; gap: var(--space-sm); position: relative; contain: layout style; }
@media (hover: hover) { .tool-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--accent); } }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-xs); padding: var(--space-sm) var(--space-md); border-radius: var(--radius-sm); font-size: var(--text-sm); font-weight: 500; border: 1px solid transparent; background: var(--accent); color: #fff; transition: var(--ease); }
.btn:hover { background: var(--accent-hover); }
.btn--outline { background: transparent; border-color: var(--border); color: var(--text-primary); }
.btn--outline:hover { background: var(--bg-surface); }
.btn-sm { padding: var(--space-xs) var(--space-sm); font-size: var(--text-xs); }
.btn.is-copied { background: var(--success); border-color: var(--success); color: #fff; }

/* Forms */
.form-group { margin-bottom: var(--space-md); }
.form-label { display: block; font-size: var(--text-sm); font-weight: 500; margin-bottom: var(--space-xs); }
.form-input, .form-textarea { width: 100%; padding: var(--space-sm) var(--space-md); border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-card); color: var(--text-primary); font-size: var(--text-base); transition: var(--ease); }
.form-input:focus, .form-textarea:focus { outline: none; box-shadow: var(--focus-ring); border-color: var(--accent); }
.form-input.is-error, .form-textarea.is-error { border-color: var(--error); box-shadow: 0 0 0 3px rgba(239,68,68,0.2); }
.form-help { font-size: var(--text-xs); color: var(--text-muted); margin-top: var(--space-xs); }

/* ═══════════════════════════════════════════════════════════════
   CRON-SPECIFIC STYLES
   ═══════════════════════════════════════════════════════════════ */

/* CRON Fields Container */
.cron-fields { display: flex; flex-direction: column; gap: var(--space-md); }

/* Field Group */
.cron-field-group { display: flex; flex-direction: column; gap: var(--space-xs); }
.cron-field-body { display: flex; flex-direction: column; gap: var(--space-xs); }

/* Mode Tabs */
.mode-tabs { display: flex; gap: 2px; background: var(--bg-surface); border-radius: 6px; padding: 2px; }
.mode-tab { flex: 1; padding: 5px 6px; border: none; background: transparent; border-radius: 4px; font-size: var(--text-xs); font-weight: 500; color: var(--text-muted); transition: all 0.15s ease; text-align: center; white-space: nowrap; }
.mode-tab:hover { color: var(--text-primary); }
.mode-tab.active { background: var(--bg-card); color: var(--accent); font-weight: 600; box-shadow: 0 1px 2px rgba(0,0,0,0.06); }

/* Mode Panels */
.mode-panel { display: none; }
.mode-panel.active { display: block; }

.mode-row { display: flex; align-items: center; gap: var(--space-sm); flex-wrap: wrap; }
.mode-row label { font-size: var(--text-sm); color: var(--text-secondary); white-space: nowrap; }

.field-hint { font-size: var(--text-xs); color: var(--text-muted); font-family: monospace; }
.field-error { font-size: var(--text-xs); color: var(--error); display: none; }
.field-error.visible { display: inline; }

.cron-sm { max-width: 180px; }
.cron-xs { max-width: 70px; }
.cron-md { max-width: 140px; }

/* Result Section */
.result-section { margin-top: var(--space-lg); padding-top: var(--space-lg); border-top: 1px solid var(--border); }

.result-box { display: flex; align-items: center; gap: var(--space-sm); margin-top: var(--space-xs); }
.result-box .form-input { flex: 1; }

.validation-badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 999px; font-size: var(--text-xs); font-weight: 600; white-space: nowrap; }
.validation-badge.is-valid  { background: var(--success-light); color: var(--success); }
.validation-badge.is-invalid { background: var(--error-light); color: var(--error); }

/* Description Box */
.description-box { margin-top: var(--space-md); padding: var(--space-sm) var(--space-md); background: var(--accent-light); border-radius: var(--radius-sm); border-left: 4px solid var(--accent); }
.description-text { font-size: var(--text-sm); color: var(--text-primary); line-height: 1.6; }

/* Next Runs */
.next-runs { margin-top: var(--space-md); }
.next-runs-title { font-size: var(--text-sm); font-weight: 600; color: var(--text-secondary); margin-bottom: var(--space-sm); }
.next-runs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: var(--space-sm); }
.next-run-item { display: flex; align-items: center; gap: var(--space-xs); padding: var(--space-xs) var(--space-sm); background: var(--bg-surface); border-radius: var(--radius-sm); font-family: monospace; font-size: var(--text-sm); color: var(--text-primary); }
.next-run-item .run-index { font-weight: 600; color: var(--accent); min-width: 18px; }

/* Section Divider */
.section-divider { display: flex; align-items: center; gap: var(--space-md); margin: var(--space-lg) 0 var(--space-md); color: var(--text-muted); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.1em; font-weight: 600; }
.section-divider::before, .section-divider::after { content: ""; flex: 1; height: 1px; background: var(--border); }

/* Presets Grid */
.presets-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: var(--space-sm); }
.preset-card { display: flex; flex-direction: column; gap: 2px; padding: var(--space-sm) var(--space-md); background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-sm); cursor: pointer; transition: var(--ease); }
.preset-card:hover { border-color: var(--accent); background: var(--accent-light); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.preset-name { font-size: var(--text-sm); font-weight: 500; color: var(--text-primary); }
.preset-expr { font-family: monospace; font-size: var(--text-xs); color: var(--accent); font-weight: 600; }

/* Manual Row */
.manual-row { display: flex; gap: var(--space-sm); align-items: stretch; }
.manual-row .form-input { flex: 1; }

/* ═══════════════════════════════════════════════════════════════
   STICKY DONATION BUTTON — flat color, no gradient
   ═══════════════════════════════════════════════════════════════ */
.sticky-donate-wrapper { position: fixed; bottom: 24px; right: 24px; z-index: 90; display: flex; flex-direction: column; align-items: flex-end; gap: 8px; opacity: 0; transform: translateY(20px); transition: opacity var(--ease), transform var(--ease); pointer-events: none; }
.sticky-donate-wrapper.is-visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.sticky-donate-btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; background: #FFDD00; color: #111; font-weight: 600; font-size: var(--text-sm); border-radius: 999px; box-shadow: var(--shadow-md); border: none; text-decoration: none; transition: transform var(--ease), box-shadow var(--ease); cursor: pointer; }
.sticky-donate-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 12px rgba(255,221,0,0.25); }
.sticky-donate-btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.donate-icon { font-size: 1.2em; }
.sticky-donate-dismiss { background: var(--bg-card); border: 1px solid var(--border); border-radius: 50%; width: 24px; height: 24px; display: grid; place-items: center; font-size: 12px; color: var(--text-muted); cursor: pointer; transition: var(--ease); align-self: flex-end; }
@media (max-width: 640px) {
  .sticky-donate-wrapper { bottom: 16px; right: 16px; }
  .sticky-donate-btn { padding: 8px 14px; font-size: var(--text-xs); }
}
@media (prefers-reduced-motion: reduce) {
  .sticky-donate-wrapper, .sticky-donate-btn { transition: none !important; animation: none !important; }
}

/* PWA Install Button */
#pwaInstallBtn { background: var(--bg-card); border: 1px solid var(--border); color: var(--text-primary); box-shadow: var(--shadow-md); padding: 8px 14px; border-radius: 999px; font-size: var(--text-xs); font-weight: 500; gap: 6px; }
#pwaInstallBtn:hover { background: var(--bg-surface); transform: translateY(-1px); }
@media (max-width: 640px) { #pwaInstallBtn { bottom: 80px; left: 16px; padding: 6px 12px; } }

/* ═══════════════════════════════════════════════════════════════
   MODAL
   ═══════════════════════════════════════════════════════════════ */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center; z-index: 10000; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease; }
.modal-overlay.is-active { opacity: 1; visibility: visible; }
.modal-container { background: var(--bg-card); border-radius: var(--radius); box-shadow: 0 20px 40px rgba(0,0,0,0.15); max-width: 90vw; max-height: 90vh; overflow: hidden; display: flex; flex-direction: column; position: relative; }
.modal-close { position: absolute; top: var(--space-md); right: var(--space-md); background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text-muted); z-index: 1; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 50%; transition: background 0.2s ease; }
.modal-close:hover { background: var(--bg-surface); color: var(--text-primary); }
.modal-content { padding: var(--space-2xl); overflow-y: auto; max-height: 80vh; }
.modal-content .modal-title { margin-top: 0; margin-bottom: var(--space-lg); font-size: var(--text-2xl); color: var(--text-primary); }
.modal-loading { text-align: center; padding: var(--space-2xl); color: var(--text-muted); }

/* ═══════════════════════════════════════════════════════════════
   DONATION PAGE & MODAL EMBED (donation.php <main> via modal)
   ═══════════════════════════════════════════════════════════════ */
.donation-card { max-width: 720px; margin: 0 auto; }
.payment-row { display: flex; flex-direction: column; gap: var(--space-lg); }
.qr-copy-grid { display: grid; grid-template-columns: 100px 1fr; gap: var(--space-md); align-items: center; }
@media (max-width: 640px) {
  .qr-copy-grid { grid-template-columns: 1fr; text-align: center; gap: var(--space-sm); }
}
.bank-details { background: var(--bg-surface); border-radius: var(--radius); padding: var(--space-md); display: flex; flex-direction: column; gap: var(--space-md); }
.impact-list { list-style: none; padding: 0; margin: var(--space-md) 0 0; display: flex; flex-direction: column; gap: var(--space-sm); }
.impact-list li { background: var(--bg-surface); padding: var(--space-sm) var(--space-md); border-radius: var(--radius-sm); font-size: var(--text-sm); border-left: 3px solid var(--accent); }
.legal-note { margin-top: var(--space-lg); padding-top: var(--space-md); border-top: 1px solid var(--border); font-size: var(--text-xs); color: var(--text-muted); }
.donation-footer { margin-top: var(--space-xl); text-align: center; font-size: var(--text-sm); color: var(--text-muted); padding-top: var(--space-md); border-top: 1px solid var(--border); }
.btn-donate-large { width: 100%; justify-content: center; background: #FFDD00; color: #000; font-weight: 700; }
.btn-donate-large:hover { background: #e6c200; transform: translateY(-1px); }
.btn-wallet { background: var(--accent); }
.btn-wise { background: #4caf50; }

/* ═══════════════════════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════════════════════ */
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.15); } }

/* Focus Accessibility */
:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: var(--radius-sm); }

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  :root { --space-xl: 1.5rem; --space-2xl: 2rem; }
  .lang-btn span { display: none; }
  .lang-btn { padding: 6px 8px; font-size: 1.2rem; }
  .mode-tabs { flex-wrap: wrap; }
  .mode-tab { font-size: 0.65rem; padding: 4px 3px; }
  .mode-row { flex-direction: column; align-items: stretch; }
  .cron-sm, .cron-xs, .cron-md { max-width: 100%; }
  .result-box { flex-wrap: wrap; }
  .next-runs-grid { grid-template-columns: 1fr 1fr; }
  .presets-grid { grid-template-columns: 1fr 1fr; }
  .manual-row { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

@media print {
  .site-header, .btn, .theme-toggle, .lang-switch, .sticky-donate-wrapper, .subsite-banner, .subsite-legal-footer { display: none; }
  body { background: #fff; color: #000; padding-bottom: 0 !important; }
  .tool-card { break-inside: avoid; box-shadow: none; border: 1px solid #000; }
}