/* ───────────────────────────────────────────────────────────
   ScyllaDB VSS Sizing Calculator — Styles
   Aligned with the ScyllaDB Cost Calculator visual language
   ─────────────────────────────────────────────────────────── */

:root {
  /* ScyllaDB palette */
  --gray-50:       #F7FAFC;
  --gray-100:      #EDF5F7;
  --gray-200:      #D8E5EB;
  --gray-300:      #C3D5DE;
  --gray-500:      #95A7BA;
  --gray-600:      #7B8BA2;
  --gray-700:      #616D87;
  --gray-800:      #4B546F;
  --gray-900:      #383D57;
  --gray-950:      #2F324B;
  --gray-black:    #23263B;

  --primary:       #2196F3;
  --primary-dark:  #0288D1;
  --primary-light: #42A5F5;
  --secondary:     #4458A3;
  --secondary-light: #6E86FA;
  --active:        #57D1E5;
  --success:       #4CAF50;
  --error:         #CE291F;

  --bg-color:      #383D57;
  --card-bg:       #FFFFFF;
  --text-color:    #4B546F;
  --text-muted:    #7B8BA2;
  --text-emphasis: #383D57;
  --border-color:  #D8E5EB;
  --border-color-dark: #C3D5DE;

  --border-radius-sm: 3px;
  --border-radius:    5px;
  --border-radius-md: 8px;

  --shadow:        0 12px 32px -1px rgba(12, 19, 37, .5);

  --font:          'Roboto Flex', Roboto, -apple-system, BlinkMacSystemFont,
                   'Segoe UI', Helvetica, Arial, sans-serif;
  --font-size-body: .875rem;

  /* Header gradient (used for gradient text) */
  --header-gradient-start: #23263B;
  --header-gradient-end:   #326DE6;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  font-size: var(--font-size-body);
  background-color: var(--bg-color);
  color: var(--gray-100);
  line-height: 1.6;
  min-height: 100vh;
  background-image:
    url('/static/bg-blob-top.svg'),
    url('/static/bg-blob-bottom.svg');
  background-repeat: no-repeat, no-repeat;
  background-size: 100% auto, 100% auto;
  background-position: top right, bottom left;
  background-attachment: fixed;
}

/* ── Header ─────────────────────────────────────────────── */

header {
  padding: 1.5rem 1.5rem .5rem;
  text-align: center;
}

header .header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .35rem;
}

header .logo {
  height: 44px;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -.01em;
  display: flex;
  align-items: center;
  gap: .5rem;
  background: linear-gradient(225deg, #ffffff 0%, var(--active) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  margin-top: .15rem;
  font-size: .85rem;
  color: var(--gray-500);
}

/* ── Layout ─────────────────────────────────────────────── */

main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto 1fr;
  gap: 1.25rem;
  max-width: 1280px;
  margin: 1rem auto 1.5rem;
  padding: 0 1rem;
  align-items: start;
}

.inputs-panel  { grid-column: 1; }
.advanced-panel { grid-column: 1; }
.results-panel { grid-column: 2; grid-row: 1 / -1; }

@media (max-width: 900px) {
  main { grid-template-columns: 1fr; grid-template-rows: auto; }
  .inputs-panel, .advanced-panel, .results-panel { grid-column: 1; grid-row: auto; }
}

/* ── Panels (cards) ─────────────────────────────────────── */

.panel {
  background: var(--card-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  color: var(--text-color);
}

.panel h2 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 1.1rem;
  background: linear-gradient(225deg, var(--header-gradient-start) 0%, var(--header-gradient-end) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.1rem;
}

.panel-header h2 {
  margin-bottom: 0;
}

.btn-copy-link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .75rem;
  font-weight: 600;
  font-family: var(--font);
  padding: .35rem .75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--card-bg);
  color: var(--text-color);
  cursor: pointer;
  transition: all .15s ease;
  white-space: nowrap;
}

.btn-copy-link:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-copy-link.copied {
  border-color: var(--success);
  color: var(--success);
}

/* ── Form Fields ────────────────────────────────────────── */

.field {
  margin-bottom: 1.25rem;
}

.field-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: .3rem;
}

.field-header label {
  font-size: var(--font-size-body);
  font-weight: 600;
  color: var(--secondary);
}

.field-value {
  font-size: var(--font-size-body);
  font-weight: 700;
  color: var(--primary-dark);
  font-variant-numeric: tabular-nums;
}

/* Editable value inputs next to sliders */
.field-input {
  border: 1px solid transparent;
  border-radius: var(--border-radius-sm);
  background: transparent;
  text-align: right;
  padding: .1rem .35rem;
  width: auto;
  min-width: 3rem;
  max-width: 10rem;
  font-family: inherit;
  outline: none;
  transition: border-color .2s ease, background .15s ease;
  cursor: text;
}

.field-input:hover {
  border-color: var(--border-color);
  background: var(--gray-50);
}

.field-input:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 5px rgba(33, 150, 243, .3);
}

.field-range {
  display: flex;
  justify-content: space-between;
  font-size: .7rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.hint {
  font-size: .75rem;
  color: var(--text-muted);
  margin-top: .25rem;
}

/* ── Range sliders ──────────────────────────────────────── */

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 5px;
  border-radius: 3px;
  background: var(--border-color);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,.2);
  cursor: pointer;
  transition: transform .12s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,.2);
  cursor: pointer;
}

/* ── Preset chips ───────────────────────────────────────── */

.preset-chips {
  display: flex;
  gap: .35rem;
  margin-top: .4rem;
  flex-wrap: wrap;
}

.chip {
  font-size: .75rem;
  font-family: var(--font);
  padding: .2rem .6rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-color);
  cursor: pointer;
  transition: all .15s ease;
}

.chip:hover, .chip.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ── Radio cards (quantization / cloud) ─────────────────── */

.radio-group {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

.radio-card {
  flex: 1 1 0;
  min-width: 120px;
  padding: .6rem .75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all .15s ease;
  text-align: center;
}

.radio-card input { display: none; }

.radio-card.selected {
  border-color: var(--primary);
  background: rgba(33, 150, 243, .06);
}

.radio-label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  color: var(--text-emphasis);
}

.radio-desc {
  display: block;
  font-size: .7rem;
  color: var(--text-muted);
  margin-top: .15rem;
}

/* ── Results ────────────────────────────────────────────── */

.results-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.placeholder-text {
  color: var(--text-muted);
  text-align: center;
  padding: 2rem 0;
}

.result-section-title {
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  background: linear-gradient(225deg, var(--header-gradient-start) 0%, var(--header-gradient-end) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: .3rem;
  margin-bottom: .5rem;
}

.result-card {
  background: var(--gray-50);
  border-radius: var(--border-radius-md);
  padding: .85rem 1rem;
  border: 1px solid var(--border-color);
}

.result-row {
  display: flex;
  justify-content: space-between;
  padding: .25rem 0;
  font-size: .82rem;
  border-bottom: 1px solid var(--border-color);
}

.result-row:last-child { border-bottom: none; }

.result-label {
  color: var(--text-muted);
}

.result-value {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text-emphasis);
}

.result-value.highlight {
  color: var(--primary-dark);
  font-size: .9rem;
}

/* ── Cost highlight ─────────────────────────────────────── */

.cost-banner {
  background-color: var(--bg-color);
  background-image:
    url('/static/bg-blob-top.svg'),
    url('/static/bg-blob-bottom.svg');
  background-repeat: no-repeat, no-repeat;
  background-size: 100% auto, 100% auto;
  background-position: top right, bottom left;
  background-attachment: fixed;
  color: var(--gray-100);
  border-radius: var(--border-radius-md);
  padding: 1rem 1.15rem;
  text-align: center;
}

.cost-banner .big-number {
  font-size: 1.5rem;
  font-weight: 700;
}

.cost-banner .small-label {
  font-size: .75rem;
  opacity: .8;
}

.cost-banner .pricing-region {
  font-size: .7rem;
  opacity: .6;
  margin-top: .35rem;
  font-style: italic;
}

.cost-banner .cost-ondemand {
  font-size: .78rem;
  opacity: .7;
  margin-top: .4rem;
}

.cost-banner .cost-ondemand-notice {
  font-size: .78rem;
  opacity: .85;
  margin-top: .4rem;
  font-style: italic;
}

/* ── Error box ──────────────────────────────────────────── */

.error-box {
  background: #fef2f2;
  border: 1px solid var(--error);
  border-radius: var(--border-radius);
  color: var(--error);
  padding: .65rem 1rem;
  font-size: .82rem;
  margin-bottom: .75rem;
}

.pricing-banner {
  grid-column: 1 / -1;
  background: #fff3cd;
  border: 1px solid #d4a017;
  border-radius: var(--border-radius);
  color: #856404;
  padding: .75rem 1.25rem;
  font-size: .85rem;
  line-height: 1.5;
}

.hidden { display: none; }

/* ── Advanced panel toggle ──────────────────────────────── */

.advanced-toggle {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: .45rem;
  user-select: none;
  margin-bottom: 0;
}

.advanced-panel:not(.collapsed) .advanced-toggle {
  margin-bottom: 1.1rem;
}

.toggle-chevron {
  transition: transform .2s ease;
  flex-shrink: 0;
}

.advanced-panel.collapsed .toggle-chevron {
  transform: rotate(-90deg);
}

.advanced-body {
  overflow: hidden;
  transition: max-height .25s ease, opacity .2s ease;
  max-height: 800px;
  opacity: 1;
}

.advanced-panel.collapsed .advanced-body {
  max-height: 0;
  opacity: 0;
}

/* ── Footer ─────────────────────────────────────────────── */

footer {
  text-align: center;
  padding: 1.25rem 1rem;
  font-size: .75rem;
  color: var(--gray-600);
}

footer .footer-logo {
  height: 24px;
  margin-bottom: .5rem;
  opacity: .7;
}

footer p {
  margin-top: .25rem;
}