/*
  Aesthetic: INSTRUMENT-PANEL — dark cockpit feel, cyan/amber accent, monospaced
  numerics, ruled separators. Calculator feels like a real financial tool, not a
  marketing page. Inspired by Bloomberg Terminal + engineering dashboards:
  mid-grey panel background (#1A1D23), bright cyan primary (#00D4FF),
  amber for warnings/discounts (#F5A623), ruled horizontal lines for structure.
  Rationale: KMU-Entscheider comparing costs respond better to "tool" framing
  than SaaS-gradient fluff — makes numbers feel credible and precise.
*/

/* ── Reset & Custom Properties ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Palette */
  --bg-base:      #0D0F14;
  --bg-panel:     #1A1D23;
  --bg-panel-alt: #20242C;
  --bg-input:     #12151A;
  --border:       #2A2F3A;
  --border-bright:#3A4050;

  --fg-primary:   #E8ECF2;
  --fg-secondary: #9DA5B4;
  --fg-dim:       #5A6070;

  --accent-cyan:  #00D4FF;
  --accent-cyan-dim: rgba(0,212,255,.12);
  --accent-amber: #F5A623;
  --accent-amber-dim: rgba(245,166,35,.12);
  --accent-green: #2ECC71;
  --accent-green-dim: rgba(46,204,113,.12);
  --accent-red:   #E74C3C;

  /* Type */
  --font-sans:  'Geist', 'Inter', system-ui, sans-serif;
  --font-mono:  'Geist Mono', 'Fira Mono', 'Consolas', monospace;

  /* Spacing */
  --r-sm:  4px;
  --r-md:  8px;
  --r-lg:  12px;
  --p-sm:  12px;
  --p-md:  20px;
  --p-lg:  32px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg-base);
  color: var(--fg-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
}

/* ── Skip Link ── */
.skip-link {
  position: absolute; top: -40px; left: 16px;
  background: var(--accent-cyan); color: #000;
  padding: 0 16px; min-height: 44px; display: inline-flex; align-items: center;
  border-radius: var(--r-md);
  font-weight: 600; z-index: 9999;
  transition: top .2s;
}
.skip-link:focus { top: 8px; }

/* ── Nav ── */
.nav {
  display: flex; align-items: center; gap: 24px;
  padding: 0 var(--p-lg);
  height: 56px;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  background: rgba(13,15,20,.92);
  backdrop-filter: blur(12px);
}
.nav__logo {
  font-family: var(--font-mono);
  font-size: 1rem; font-weight: 500;
  color: var(--fg-primary);
  text-decoration: none; letter-spacing: -.02em;
  display: inline-flex; align-items: center; min-height: 44px;
}
.nav__logo span { color: var(--accent-cyan); }
.nav__links {
  display: flex; gap: 24px; list-style: none;
  margin-left: 8px;
}
.nav__links a {
  color: var(--fg-secondary); text-decoration: none;
  font-size: .875rem;
  transition: color .15s;
  display: inline-flex; align-items: center; min-height: 44px; min-width: 44px; justify-content: center;
}
.nav__links a:hover { color: var(--fg-primary); }
.nav__cta {
  margin-left: auto;
  background: var(--accent-cyan);
  color: #000; font-weight: 600;
  font-size: .8125rem; text-decoration: none;
  padding: 0 16px; min-height: 44px; display: inline-flex; align-items: center;
  border-radius: var(--r-md);
  transition: opacity .15s;
  white-space: nowrap;
}
.nav__cta:hover { opacity: .85; }

/* ── Page Header ── */
.page-header {
  padding: var(--p-lg) var(--p-lg) 0;
  max-width: 1200px; margin: 0 auto;
}
.page-header__eyebrow {
  font-family: var(--font-mono);
  font-size: .75rem; letter-spacing: .1em;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.page-header__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600; line-height: 1.2;
  margin-bottom: 8px;
}
.page-header__sub {
  color: var(--fg-secondary);
  font-size: .9375rem; max-width: 560px;
}

/* ── Mode Bar ── */
.mode-bar {
  display: flex; align-items: center;
  gap: 0;
  max-width: 1200px;
  margin: var(--p-lg) auto 0;
  padding: 0 var(--p-lg);
}
.mode-bar__label {
  font-family: var(--font-mono);
  font-size: .6875rem; letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-right: 12px;
  white-space: nowrap;
}
.mode-bar__group {
  display: flex;
  border: 1px solid var(--border-bright);
  border-radius: var(--r-md);
  overflow: hidden;
}
.mode-bar__btn {
  padding: 0 20px;
  min-height: 44px;
  background: transparent;
  border: none; border-right: 1px solid var(--border-bright);
  color: var(--fg-secondary);
  font-family: var(--font-mono);
  font-size: .8125rem; font-weight: 500;
  cursor: pointer;
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.mode-bar__btn:last-child { border-right: none; }
.mode-bar__btn[aria-pressed="true"] {
  background: var(--accent-cyan);
  color: #000;
}
.mode-bar__btn:hover:not([aria-pressed="true"]) {
  background: var(--bg-panel);
  color: var(--fg-primary);
}
.mode-bar__billing {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .8125rem;
}
.mode-bar__billing label {
  display: flex; align-items: center; gap: 6px;
  cursor: pointer; color: var(--fg-secondary);
  padding: 0 12px;
  min-height: 44px;
  border-radius: var(--r-md);
  transition: background .15s;
}
.mode-bar__billing label:hover { background: var(--bg-panel); }
.mode-bar__billing input[type=radio] { display: none; }
.mode-bar__billing label.active { color: var(--fg-primary); }
.mode-bar__billing .badge-discount {
  background: var(--accent-amber);
  color: #000; font-size: .625rem;
  padding: 2px 5px; border-radius: 3px;
  font-weight: 700; letter-spacing: .05em;
}

/* ── Main Calculator Layout ── */
.calculator-body {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 20px;
  max-width: 1200px;
  margin: var(--p-md) auto;
  padding: 0 var(--p-lg) var(--p-lg);
  align-items: start;
}
@media (max-width: 860px) {
  .calculator-body { grid-template-columns: 1fr; }
}

/* ── Left Panel ── */
.config-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.config-panel__section {
  border-bottom: 1px solid var(--border);
}
.config-panel__section:last-child { border-bottom: none; }
.config-panel__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--p-sm) var(--p-md);
  background: var(--bg-panel-alt);
}
.config-panel__heading {
  font-family: var(--font-mono);
  font-size: .6875rem; letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fg-dim);
}
.config-panel__body {
  padding: var(--p-sm) var(--p-md);
}

/* Branche Selector */
.branche-select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-bright);
  border-radius: var(--r-md);
  color: var(--fg-primary);
  font-family: var(--font-sans);
  font-size: .9375rem;
  padding: 0 14px;
  min-height: 44px;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239DA5B4' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
  transition: border-color .15s;
}
.branche-select:focus {
  outline: none;
  border-color: var(--accent-cyan);
}

/* Bundle Mode Info */
.bundle-info {
  display: none;
}
.bundle-info.visible { display: block; }
.bundle-info__box {
  background: var(--accent-cyan-dim);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--r-md);
  padding: var(--p-sm) var(--p-md);
  margin-bottom: 12px;
}
.bundle-info__title {
  font-family: var(--font-mono);
  font-size: .75rem; letter-spacing: .08em;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.bundle-info__text {
  font-size: .875rem; color: var(--fg-secondary);
}
.bundle-info__includes {
  list-style: none; margin-top: 8px;
}
.bundle-info__includes li {
  font-size: .8125rem; color: var(--fg-secondary);
  padding: 3px 0;
  display: flex; align-items: center; gap: 8px;
}
.bundle-info__includes li::before {
  content: '✓';
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: .75rem;
}

/* Module List */
.module-list {
  list-style: none;
}
.module-item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  transition: background .1s;
  border-radius: var(--r-sm);
}
.module-item:last-child { border-bottom: none; }
.module-item--locked {
  opacity: .55;
  cursor: not-allowed;
}
.module-item--included {
  /* always-included base modules in bundle mode */
}

.module-checkbox-wrap {
  flex-shrink: 0; padding-top: 2px;
}
.module-checkbox {
  width: 44px; height: 44px;
  min-width: 44px; min-height: 44px;
  border: 1.5px solid var(--border-bright);
  border-radius: 6px;
  background: var(--bg-input);
  appearance: none;
  cursor: pointer;
  position: relative;
  transition: background .15s, border-color .15s;
  flex-shrink: 0;
}
.module-checkbox:checked {
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
}
.module-checkbox:checked::after {
  content: '';
  position: absolute; top: 14px; left: 18px;
  width: 6px; height: 11px;
  border: 2px solid #000;
  border-top: none; border-left: none;
  transform: rotate(45deg);
}
.module-checkbox:disabled {
  cursor: not-allowed;
  opacity: .5;
}

.module-info { flex: 1; min-width: 0; }
.module-name {
  font-size: .9375rem; font-weight: 500;
  color: var(--fg-primary);
  display: flex; align-items: center; gap: 8px;
}
.module-tag {
  font-family: var(--font-mono);
  font-size: .625rem; letter-spacing: .08em;
  padding: 2px 6px; border-radius: 3px;
  text-transform: uppercase;
  background: var(--accent-cyan-dim);
  color: var(--accent-cyan);
  border: 1px solid rgba(0,212,255,.25);
}
.module-tag--always {
  background: var(--accent-amber-dim);
  color: var(--accent-amber);
  border-color: rgba(245,166,35,.25);
}
.module-tag--bundle {
  background: var(--accent-green-dim);
  color: var(--accent-green);
  border-color: rgba(46,204,113,.25);
}
.module-desc {
  font-size: .8125rem; color: var(--fg-secondary);
  margin-top: 3px;
}
.module-price-tag {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: .9375rem; font-weight: 500;
  color: var(--fg-primary);
  white-space: nowrap;
  padding-top: 2px;
}
.module-price-tag--free {
  color: var(--accent-green);
  font-size: .8125rem;
}

/* Addon Counter (bundle mode) */
.addon-counter {
  display: flex; align-items: center; gap: 16px;
  padding: var(--p-sm) 0;
}
.addon-counter__label {
  font-size: .875rem; color: var(--fg-secondary);
  flex: 1;
}
.addon-counter__controls {
  display: flex; align-items: center; gap: 8px;
}
.addon-btn {
  width: 44px; height: 44px;
  min-width: 44px; min-height: 44px;
  background: var(--bg-input);
  border: 1px solid var(--border-bright);
  border-radius: var(--r-sm);
  color: var(--fg-primary);
  font-size: 1.125rem; font-weight: 500;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .15s, border-color .15s;
}
.addon-btn:hover { background: var(--bg-panel-alt); border-color: var(--accent-cyan); }
.addon-btn:disabled { opacity: .35; cursor: not-allowed; }
.addon-counter__val {
  font-family: var(--font-mono);
  font-size: 1rem; font-weight: 500;
  min-width: 24px; text-align: center;
}

/* ── Right Panel — Live Total ── */
.total-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  position: sticky;
  top: 72px;
}
.total-panel__header {
  padding: var(--p-sm) var(--p-md);
  background: var(--bg-panel-alt);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.total-panel__title {
  font-family: var(--font-mono);
  font-size: .6875rem; letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fg-dim);
}
.total-panel__mode-badge {
  font-family: var(--font-mono);
  font-size: .625rem; letter-spacing: .08em;
  padding: 2px 7px; border-radius: 3px;
  text-transform: uppercase;
  background: var(--accent-cyan-dim);
  color: var(--accent-cyan);
  border: 1px solid rgba(0,212,255,.25);
}

.total-panel__body { padding: var(--p-sm) var(--p-md); }

.total-line {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 7px 0;
  border-bottom: 1px dashed var(--border);
}
.total-line:last-child { border-bottom: none; }
.total-line__label {
  font-size: .8125rem; color: var(--fg-secondary);
}
.total-line__val {
  font-family: var(--font-mono);
  font-size: .875rem; font-weight: 500;
  color: var(--fg-primary);
}
.total-line--discount .total-line__val {
  color: var(--accent-amber);
}
.total-line--discount .total-line__label {
  color: var(--accent-amber);
}

.total-divider {
  height: 1px;
  background: var(--border-bright);
  margin: 10px 0;
}

.total-main {
  padding: 14px 0 8px;
}
.total-main__label {
  font-family: var(--font-mono);
  font-size: .6875rem; letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 4px;
}
.total-main__amount {
  font-family: var(--font-mono);
  font-size: 2.5rem; font-weight: 500;
  color: var(--accent-cyan);
  line-height: 1;
  letter-spacing: -.02em;
}
.total-main__period {
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: var(--fg-secondary);
  margin-top: 4px;
}
.total-main__annual {
  font-family: var(--font-mono);
  font-size: .875rem;
  color: var(--fg-secondary);
  margin-top: 8px;
}
.total-main__annual strong {
  color: var(--accent-amber);
}

.total-panel__footer { padding: 0 var(--p-md) var(--p-md); }

.cta-primary {
  display: block; width: 100%;
  background: var(--accent-cyan);
  color: #000;
  font-weight: 700; font-size: .9375rem;
  text-decoration: none; text-align: center;
  padding: 13px var(--p-md);
  border-radius: var(--r-md);
  border: none; cursor: pointer;
  transition: opacity .15s, transform .1s;
  margin-bottom: 10px;
}
.cta-primary:hover { opacity: .88; transform: translateY(-1px); }
.cta-primary:active { transform: translateY(0); }

.cta-secondary {
  display: block; width: 100%;
  background: transparent;
  color: var(--fg-secondary);
  font-size: .875rem;
  text-decoration: none; text-align: center;
  padding: 0 var(--p-md);
  min-height: 44px;
  line-height: 44px;
  border-radius: var(--r-md);
  border: 1px solid var(--border-bright);
  cursor: pointer;
  transition: color .15s, border-color .15s;
}
.cta-secondary:hover {
  color: var(--fg-primary);
  border-color: var(--fg-secondary);
}

/* ── Footer ── */
.calc-footer {
  max-width: 1200px; margin: 0 auto;
  padding: 0 var(--p-lg) var(--p-lg);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 8px;
}
.calc-footer__note {
  font-family: var(--font-mono);
  font-size: .6875rem; color: var(--fg-dim);
}
.calc-footer__logo {
  font-family: var(--font-mono);
  font-size: .875rem; color: var(--fg-dim);
}
.calc-footer__logo span { color: var(--accent-cyan); }

/* ── Discount Notice Strip ── */
.discount-notice {
  display: none;
  background: var(--accent-amber-dim);
  border: 1px solid rgba(245,166,35,.3);
  border-radius: var(--r-md);
  padding: 10px 14px;
  margin: 10px 0 4px;
  font-size: .8125rem; color: var(--accent-amber);
  font-family: var(--font-mono);
}
.discount-notice.visible { display: block; }

/* ── Tooltip ── */
.info-tip {
  position: relative; display: inline-flex;
}
.info-tip__icon {
  width: 16px; height: 16px;
  border: 1px solid var(--border-bright);
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: .625rem; color: var(--fg-dim);
  cursor: help;
  margin-left: 4px;
  transition: border-color .15s;
}
.info-tip__icon:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); }
.info-tip__popup {
  display: none;
  position: absolute; left: 50%; bottom: calc(100% + 8px);
  transform: translateX(-50%);
  background: var(--bg-panel-alt);
  border: 1px solid var(--border-bright);
  border-radius: var(--r-md);
  padding: 8px 12px;
  width: 220px;
  font-size: .75rem; color: var(--fg-secondary);
  z-index: 20;
  white-space: normal;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
}
.info-tip:hover .info-tip__popup,
.info-tip:focus-within .info-tip__popup { display: block; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 3px; }