/* ==========================================================
   AI Calculator · Internal Alta Retheme 5 skin
   Scope: visual-only overlay. Calculator engine, AI chat flow,
   admin auth/config, and field-sync behavior remain in JS/server files.
   Default: DARK mode; light mode is available via [data-theme="light"].
   ========================================================== */

:root:not([data-theme="light"]),
:root[data-theme="dark"] {
  color-scheme: dark;
  --r5-bg: #050c1c;
  --r5-page: radial-gradient(1300px 820px at 80% -8%, #12285a 0%, #0a1737 42%, #060e21 72%, #050b1a 100%);
  --r5-text: #e9f0fb;
  --r5-muted: #8fa2c4;
  --r5-muted-2: #8093b5;
  --r5-faint: #6f82a6;
  --r5-card: rgba(13,24,48,.72);
  --r5-card-hover: rgba(20,36,72,.86);
  --r5-panel: rgba(14,26,52,.78);
  --r5-section: rgba(13,24,48,.66);
  --r5-inset: rgba(5,12,28,.72);
  --r5-border: rgba(120,150,210,.14);
  --r5-border-strong: rgba(43,139,255,.48);
  --r5-divider: rgba(120,150,210,.10);
  --r5-chip: rgba(120,150,210,.10);
  --r5-row-hover: rgba(30,50,92,.55);
  --r5-accent: #2b8bff;
  --r5-accent-2: #34c2df;
  --r5-lime: #a6da4c;
  --r5-accent-soft: rgba(43,139,255,.12);
  --r5-success: #48d178;
  --r5-warn: #ffb84d;
  --r5-danger: #ff6574;
  --r5-shadow: 0 18px 44px rgba(0,0,0,.30);
  --r5-glow: rgba(43,139,255,.28);
  --r5-geo-opacity: .50;
  --r5-geo-stroke: #3f6cc8;

  --font-heading: Archivo, Figtree, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: Figtree, "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --toolhub-bg: var(--r5-bg);
  --toolhub-panel: var(--r5-panel);
  --toolhub-panel-2: var(--r5-card);
  --toolhub-line: var(--r5-border);
  --toolhub-muted: var(--r5-muted);
  --toolhub-soft: var(--r5-muted-2);
  --toolhub-text: var(--r5-text);
  --toolhub-cyan: var(--r5-accent);
  --toolhub-cyan-2: var(--r5-accent-2);
  --toolhub-green: var(--r5-success);
}

:root[data-theme="light"] {
  color-scheme: light;
  --r5-bg: #ffffff;
  --r5-page: #ffffff;
  --r5-text: #1c1f24;
  --r5-muted: #6b7280;
  --r5-muted-2: #7a8290;
  --r5-faint: #8b93a1;
  --r5-card: #f4f6f9;
  --r5-card-hover: #eef1f6;
  --r5-panel: #f4f6f9;
  --r5-section: #ffffff;
  --r5-inset: #ffffff;
  --r5-border: #e2e6ec;
  --r5-border-strong: rgba(11,111,232,.35);
  --r5-divider: #eaedf2;
  --r5-chip: #eef1f5;
  --r5-row-hover: #f2f5f9;
  --r5-accent: #0b6fe8;
  --r5-accent-2: #0b6fe8;
  --r5-lime: #6da51d;
  --r5-accent-soft: rgba(11,111,232,.10);
  --r5-success: #2ea86a;
  --r5-warn: #a86b00;
  --r5-danger: #c83d4a;
  --r5-shadow: 0 1px 2px rgba(20,40,80,.04), 0 14px 32px rgba(20,40,80,.06);
  --r5-glow: rgba(11,111,232,.07);
  --r5-geo-opacity: .13;
  --r5-geo-stroke: #c3d2ee;

  --font-heading: Archivo, Figtree, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: Figtree, "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --toolhub-bg: var(--r5-bg);
  --toolhub-panel: var(--r5-panel);
  --toolhub-panel-2: var(--r5-card);
  --toolhub-line: var(--r5-border);
  --toolhub-muted: var(--r5-muted);
  --toolhub-soft: var(--r5-muted-2);
  --toolhub-text: var(--r5-text);
  --toolhub-cyan: var(--r5-accent);
  --toolhub-cyan-2: var(--r5-accent-2);
  --toolhub-green: var(--r5-success);
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--r5-bg); scroll-behavior: smooth; }
html, body {
  color: var(--r5-text) !important;
  font-family: var(--font-body) !important;
}
body {
  background: var(--r5-bg) !important;
  letter-spacing: normal;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -4;
  pointer-events: none;
  background: var(--r5-page);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  opacity: var(--r5-geo-opacity);
  background:
    radial-gradient(circle at 83% -12%, var(--r5-glow), transparent 34rem),
    linear-gradient(60deg, transparent 0 47.5%, color-mix(in srgb, var(--r5-geo-stroke) 45%, transparent) 48% 48.4%, transparent 49% 100%),
    linear-gradient(120deg, transparent 0 47.5%, color-mix(in srgb, var(--r5-geo-stroke) 35%, transparent) 48% 48.4%, transparent 49% 100%);
  background-size: auto, 360px 208px, 360px 208px;
  mask-image: linear-gradient(90deg, transparent 0%, black 38%, black 100%);
}
::selection { background: color-mix(in srgb, var(--r5-accent) 28%, transparent); }
:focus-visible { outline: 2px solid color-mix(in srgb, var(--r5-accent) 55%, transparent); outline-offset: 2px; }
button, input, textarea, select { font-family: var(--font-body); }

.calculator-shell {
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
}
.calculator-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  align-items: stretch;
  padding: 38px 40px 0;
}
.calculator-hero-copy {
  border: 1px solid var(--r5-border);
  border-radius: 18px;
  background: linear-gradient(120deg, color-mix(in srgb, var(--r5-accent) 8%, transparent), transparent 45%), var(--r5-section);
  box-shadow: var(--r5-shadow);
}
.calculator-hero-copy {
  padding: 30px 32px;
}
.calculator-eyebrow {
  margin: 0 0 13px;
  color: var(--r5-accent-2);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .20em;
}
.calculator-hero h1 {
  width: 100%;
  max-width: none;
  margin: 0;
  color: var(--r5-text);
  font-family: var(--font-heading);
  font-size: clamp(34px, 5.2vw, 70px);
  line-height: .96;
  letter-spacing: -.05em;
}
.calculator-hero p:not(.calculator-eyebrow) {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--r5-muted);
  font-size: 15px;
  line-height: 1.6;
}
.calculator-hero-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--r5-divider);
}
.metric-card {
  display: grid;
  gap: 6px;
  min-height: 78px;
  padding: 16px 18px;
  border: 1px solid var(--r5-border);
  border-radius: 14px;
  background: var(--r5-card);
}
.metric-card.selected {
  border-color: var(--r5-border);
  background: var(--r5-card);
}
.metric-card span {
  color: var(--r5-faint);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.metric-card strong {
  color: var(--r5-text);
  font-size: 15px;
  line-height: 1.25;
}

/* Header */
.title-bar {
  min-height: 82px;
  padding: 20px 40px !important;
  background: color-mix(in srgb, var(--r5-panel) 30%, transparent) !important;
  border-bottom: 1px solid var(--r5-border) !important;
  box-shadow: none !important;
  backdrop-filter: blur(18px) saturate(130%) !important;
  -webkit-backdrop-filter: blur(18px) saturate(130%) !important;
}
.brand { min-width: 260px; gap: 14px !important; }
.brand-logo {
  width: 30px !important;
  height: 30px !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: none !important;
  box-shadow: none !important;
  position: relative;
}
.brand-logo i { display: none; }
.brand-logo::before,
.brand-logo::after {
  content: "";
  position: absolute;
  inset: 2px;
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  background: linear-gradient(135deg, var(--r5-accent), var(--r5-accent-2) 52%, var(--r5-lime));
}
.brand-logo::after {
  inset: 7px 8px 6px;
  background: var(--r5-bg);
}
.brand-title {
  color: var(--r5-text) !important;
  font-family: var(--font-heading) !important;
  font-weight: 700 !important;
  letter-spacing: .03em !important;
  font-size: 17px !important;
  line-height: 1.05 !important;
}
.brand-sub {
  color: var(--r5-faint) !important;
  font-family: var(--font-mono) !important;
  font-size: 10px !important;
  letter-spacing: .20em !important;
  line-height: 1.2 !important;
}
.title-meta { gap: 10px !important; }
.title-bar .admin-link,
.title-bar .theme-toggle {
  width: 42px !important;
  height: 42px !important;
  min-height: 42px !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 11px !important;
  border: 1px solid var(--r5-border) !important;
  background: var(--r5-panel) !important;
  color: var(--r5-muted) !important;
  box-shadow: none !important;
  transition: background .16s ease, color .16s ease, border-color .16s ease, transform .16s ease;
}
.title-bar .theme-toggle {
  padding: 0 !important;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0;
}
.theme-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: currentColor;
  font-size: 19px;
  line-height: 1;
}
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}
.title-bar .admin-link:hover,
.title-bar .theme-toggle:hover {
  background: var(--r5-card-hover) !important;
  color: var(--r5-text) !important;
  border-color: var(--r5-border-strong) !important;
  transform: translateY(-1px);
}

/* Chat card */
.chat-section {
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding: 24px 40px 18px !important;
}
.chat-section-inner { max-width: none !important; width: 100%; }
#chat-panel {
  --chat-primary: var(--r5-accent);
  --chat-primary-hover: color-mix(in srgb, var(--r5-accent) 86%, white 14%);
  --chat-bg: var(--r5-section);
  --chat-panel: var(--r5-panel);
  --chat-panel-2: var(--r5-card);
  --chat-user-bg: linear-gradient(135deg, var(--r5-accent-2), var(--r5-accent));
  --chat-assistant-bg: color-mix(in srgb, var(--r5-card) 84%, transparent);
  --chat-text: var(--r5-text);
  --chat-text-light: var(--r5-muted);
  --chat-border: var(--r5-border);
  border: 1px solid color-mix(in srgb, var(--r5-accent-2) 32%, var(--r5-border)) !important;
  border-radius: 18px !important;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--r5-accent-2) 12%, transparent), transparent 38%),
    var(--r5-section) !important;
  box-shadow: var(--r5-shadow) !important;
}
#chat-header {
  min-height: 82px;
  padding: 20px 24px !important;
  background: linear-gradient(110deg,
    color-mix(in srgb, var(--r5-accent) 18%, transparent),
    color-mix(in srgb, var(--r5-accent-2) 8%, transparent) 58%,
    transparent) !important;
  border-bottom-color: var(--r5-border) !important;
}
#chat-header::before {
  opacity: .18;
  background-image:
    linear-gradient(color-mix(in srgb, var(--r5-accent) 20%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--r5-accent) 18%, transparent) 1px, transparent 1px) !important;
  background-size: 34px 34px !important;
}
#chat-header-icon {
  width: 46px !important;
  height: 46px !important;
  border-radius: 12px !important;
  background: linear-gradient(150deg, color-mix(in srgb, var(--r5-accent) 22%, transparent), color-mix(in srgb, var(--r5-accent-2) 12%, transparent)) !important;
  border-color: color-mix(in srgb, var(--r5-accent-2) 35%, var(--r5-border)) !important;
  box-shadow: none !important;
}
#chat-header-icon svg { fill: var(--r5-accent-2) !important; }
#chat-header-text h3 {
  color: var(--r5-text) !important;
  font-family: var(--font-heading) !important;
  font-size: 20px !important;
  font-weight: 700 !important;
}
#chat-header-text p {
  color: var(--r5-accent-2) !important;
  font-family: var(--font-mono) !important;
  font-weight: 700;
}
#chat-messages {
  height: clamp(280px, 32vh, 380px) !important;
  background: color-mix(in srgb, var(--r5-bg) 58%, transparent) !important;
}
.chat-message {
  max-width: min(100%, 760px) !important;
  overflow-wrap: anywhere;
}
.chat-message.user {
  color: #061020 !important;
  background: linear-gradient(135deg, var(--r5-accent-2), var(--r5-accent)) !important;
  box-shadow: 0 10px 26px color-mix(in srgb, var(--r5-accent-2) 26%, transparent) !important;
}
:root[data-theme="dark"] .chat-message.user,
:root:not([data-theme="light"]) .chat-message.user { color: #04101f !important; }
:root[data-theme="light"] .chat-message.user { color: #fff !important; }
.chat-message.assistant,
.typing-indicator {
  color: var(--r5-text) !important;
  background: var(--chat-assistant-bg) !important;
  border-color: var(--r5-border) !important;
}
.chat-message.assistant strong { color: var(--r5-text) !important; }
.chat-message.assistant code,
.chat-table th,
.calc-sync-notice {
  color: var(--r5-accent-2) !important;
  background: var(--r5-accent-soft) !important;
}
.chat-table th,
.chat-table td { border-color: var(--r5-border) !important; }
#chat-input-area {
  background: color-mix(in srgb, var(--r5-section) 92%, var(--r5-bg)) !important;
  border-top-color: var(--r5-border) !important;
}
#chat-input {
  min-height: 42px;
  border-radius: 11px !important;
  background: var(--r5-inset) !important;
  border-color: var(--r5-border) !important;
  color: var(--r5-text) !important;
  font-family: var(--font-body) !important;
}
#chat-input::placeholder { color: var(--r5-faint) !important; }
#chat-input:focus {
  border-color: var(--r5-border-strong) !important;
  background: var(--r5-panel) !important;
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--r5-accent) 34%, transparent) !important;
}
#chat-csv-btn,
.design-io-btn {
  border-color: var(--r5-border) !important;
  background: var(--r5-panel) !important;
}
#chat-csv-btn:hover,
.design-io-btn:hover {
  background: var(--r5-card-hover) !important;
  border-color: var(--r5-border-strong) !important;
}
#chat-csv-btn svg,
.design-io-btn svg { fill: var(--r5-muted) !important; }
#chat-csv-btn:hover svg,
.design-io-btn:hover svg { fill: var(--r5-accent-2) !important; }
#chat-design-save-btn { border-color: color-mix(in srgb, var(--r5-accent) 44%, var(--r5-border)) !important; }
#chat-send-btn {
  background: linear-gradient(135deg, var(--r5-accent-2), var(--r5-accent)) !important;
  border-color: transparent !important;
  box-shadow: 0 10px 26px color-mix(in srgb, var(--r5-accent-2) 30%, transparent) !important;
}
#chat-send-btn:hover { filter: brightness(1.06); }
#chat-send-btn svg { fill: #061020 !important; }
:root[data-theme="light"] #chat-send-btn svg { fill: #fff !important; }
#chat-send-btn:disabled {
  background: var(--r5-chip) !important;
  border-color: var(--r5-border) !important;
  box-shadow: none !important;
}
.typing-indicator span { background: var(--r5-accent-2) !important; }
.calc-sync-notice { border-top-color: color-mix(in srgb, var(--r5-accent-2) 30%, var(--r5-border)) !important; }

/* Embedded storage calculator shell */
.calculator-section {
  width: 100%;
  max-width: 1360px !important;
  padding: 18px clamp(12px, 2vw, 24px) 64px !important;
}
.calculator-section .o-container-module {
  width: 100% !important;
  max-width: none !important;
  padding: clamp(16px, 1.6vw, 24px) !important;
  overflow-x: auto !important;
  border-radius: 18px !important;
  border: 1px solid var(--r5-border) !important;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--r5-accent) 7%, transparent), transparent 34%),
    var(--r5-section) !important;
  box-shadow: var(--r5-shadow) !important;
}
#storage-calculator,
#storage-calculator * { font-family: var(--font-body) !important; }
#storage-calculator {
  color: var(--r5-text) !important;
  min-width: 0;
}
#storage-calculator .o-heading,
#storage-calculator h2,
#storage-calculator h3,
#storage-calculator .c-sc-accordion__title-text {
  color: var(--r5-text) !important;
  font-family: var(--font-heading) !important;
  font-weight: 700 !important;
}
#storage-calculator > h2.o-heading {
  margin-bottom: 22px !important;
  flex-wrap: wrap;
}
#storage-calculator > h2.o-heading::before {
  width: 100%;
  color: var(--r5-accent-2) !important;
  font-family: var(--font-mono) !important;
  font-weight: 700;
  font-size: 12px !important;
}
#storage-calculator .c-sc-accordion,
#storage-calculator .c-sc-report,
#storage-calculator .c-sc-accordion__item,
#storage-calculator .c-sc-accordion__content,
#storage-calculator .c-sc-step-summary,
#storage-calculator .c-sc-summary,
#storage-calculator .c-sc-report__body {
  color: var(--r5-muted-2) !important;
}
#storage-calculator .c-sc-accordion__title,
#storage-calculator .c-sc-accordion__item,
#storage-calculator .c-sc-report,
#storage-calculator .c-sc-summary,
#storage-calculator .c-sc-step-summary {
  background-color: color-mix(in srgb, var(--r5-card) 84%, transparent) !important;
  border-color: var(--r5-border) !important;
}
#storage-calculator .c-sc-table th,
#storage-calculator .c-sc-table__td-label,
#storage-calculator .c-sc-step-summary__action,
#storage-calculator .c-sc-summary th {
  color: var(--r5-muted) !important;
}
#storage-calculator .c-sc-summary td,
#storage-calculator .c-sc-input__value,
#storage-calculator label,
#storage-calculator p,
#storage-calculator span {
  color: inherit;
}
#storage-calculator .c-sc-input,
#storage-calculator input,
#storage-calculator select,
#storage-calculator textarea,
#storage-calculator .c-sc-output-boxed {
  min-height: 40px;
  border-radius: 11px !important;
  background-color: var(--r5-inset) !important;
  border-color: var(--r5-border) !important;
  color: var(--r5-text) !important;
}
#storage-calculator input:focus,
#storage-calculator select:focus,
#storage-calculator textarea:focus {
  border-color: var(--r5-border-strong) !important;
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--r5-accent) 34%, transparent) !important;
  outline: none !important;
}
#storage-calculator .o-sc-dropdown__content,
#storage-calculator .o-sc-dropdown__content * {
  color: #1c1f24 !important;
}
#storage-calculator .o-btn,
#storage-calculator .o-btn-sc-next,
#storage-calculator button[type="button"] {
  border-radius: 10px !important;
}
#storage-calculator .o-btn--green,
#storage-calculator .o-btn--camera,
#storage-calculator .o-btn--server {
  background: linear-gradient(135deg, var(--r5-accent-2), var(--r5-accent)) !important;
  border-color: transparent !important;
  color: #061020 !important;
  box-shadow: 0 10px 26px color-mix(in srgb, var(--r5-accent-2) 24%, transparent) !important;
}
:root[data-theme="light"] #storage-calculator .o-btn--green,
:root[data-theme="light"] #storage-calculator .o-btn--camera,
:root[data-theme="light"] #storage-calculator .o-btn--server { color: #fff !important; }
#storage-calculator .o-btn--green:hover,
#storage-calculator .o-btn--camera:hover,
#storage-calculator .o-btn--server:hover { filter: brightness(1.06); }
#storage-calculator .o-btn-sc-next,
#storage-calculator .c-sc-step-summary__action { color: var(--r5-accent-2) !important; }

/* QA pass: avoid clipping/overflow in the third-party widget at laptop widths. */
#storage-calculator .c-sc-report,
#storage-calculator .c-sc-accordion__item,
#storage-calculator .c-sc-accordion__content { min-width: 0; }
#storage-calculator .c-sc-accordion__content {
  overflow: visible;
  padding-bottom: 10px;
}
#storage-calculator .c-sc-accordion__item.is-closed .c-sc-accordion__content {
  display: none !important;
  overflow: hidden !important;
  padding-bottom: 0;
}
#storage-calculator .c-sc-table {
  width: 100% !important;
  min-width: 1160px;
}
#storage-calculator .c-sc-table th,
#storage-calculator .c-sc-table td { vertical-align: bottom; }
#storage-calculator .c-sc-table__td-label {
  min-height: 38px;
  line-height: 1.18;
  white-space: normal;
  overflow: visible;
}
#storage-calculator .c-sc-input__value {
  display: block;
  min-width: 0;
  max-width: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#storage-calculator .c-sc-table__td--recording-mode { min-width: 102px; }
#storage-calculator .c-sc-table__td--stream { min-width: 232px; }
#storage-calculator .c-sc-table__td--scenario { min-width: 122px; }
#storage-calculator .c-sc-table__td--time-period { min-width: 92px; }
#storage-calculator .c-sc-table__td--camera-quantity,
#storage-calculator .c-sc-table__td--retention_days { min-width: 78px; }
#storage-calculator .c-sc-table__td--bitrate,
#storage-calculator .c-sc-table__td--required-storage { min-width: 86px; }
#storage-calculator .c-sc-step-summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px 28px;
}
#storage-calculator .c-sc-step-summary__action {
  min-width: min(100%, 520px);
  white-space: normal;
}
#storage-calculator .c-sc-step-summary__totals { margin-left: auto; }

/* Preserve calculator semantic validation colours. */
#storage-calculator .c-sc-summary .c-sc-summary__status {
  font-weight: 700 !important;
  text-transform: uppercase;
}
#storage-calculator .c-sc-summary .c-sc-summary__status--success { color: var(--r5-success) !important; }
#storage-calculator .c-sc-summary .c-sc-summary__status--warning { color: var(--r5-warn) !important; }
#storage-calculator .c-sc-summary .c-sc-summary__status--error,
#storage-calculator .c-sc-summary .c-sc-summary__status--danger { color: var(--r5-danger) !important; }

@media (max-width: 980px) {
  .calculator-hero {
    grid-template-columns: 1fr;
    padding: 30px 24px 0;
  }
  .calculator-hero-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 820px) {
  .title-bar { height: auto; min-height: 0; padding: 16px 18px !important; flex-wrap: wrap; }
  .brand { min-width: auto; }
  .calculator-hero { padding: 24px 18px 0; gap: 16px; }
  .calculator-hero-copy { padding: 24px; }
  .calculator-hero-cards { grid-template-columns: 1fr; }
  .chat-section { padding: 18px 18px 14px !important; }
}

@media (max-width: 640px) {
  .title-bar .theme-toggle { width: 38px !important; height: 38px !important; min-height: 38px !important; }
  .chat-section { padding-inline: 12px !important; }
  #chat-input-area { gap: 6px; padding: 12px; }
  #chat-csv-btn,
  .design-io-btn,
  #chat-send-btn { width: 38px; height: 38px; }
  .calculator-section { padding-bottom: 44px !important; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}