/* ============================================
   café soft — Global Styles & Design System
   Philosophy: Antigravity-inspired minimalism
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --c-bg: #FFFFFF;
  --c-fg: #000000;
  --c-bg-inv: #000000;
  --c-fg-inv: #FFFFFF;

  --ff-primary: 'Inter', 'Helvetica Neue', Arial, sans-serif;

  --fw-regular: 400;
  --fw-bold: 700;
  --fw-black: 900;

  --fs-display: clamp(3rem, 8vw, 8rem);
  --fs-h1: clamp(2.4rem, 5vw, 5rem);
  --fs-h2: clamp(1.8rem, 3.5vw, 3.5rem);
  --fs-h3: clamp(1.2rem, 2vw, 1.8rem);
  --fs-body: clamp(0.95rem, 1.2vw, 1.15rem);
  --fs-small: clamp(0.75rem, 0.9vw, 0.9rem);
  --fs-micro: clamp(0.65rem, 0.75vw, 0.78rem);

  --ls-tight: -0.04em;
  --ls-normal: -0.02em;
  --ls-wide: 0.08em;

  --lh-tight: 0.95;
  --lh-normal: 1.5;

  --border: 1px solid #000000;
  --border-inv: 1px solid #FFFFFF;
  --border-light: 1px solid rgba(0,0,0,0.12);

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-in-out: cubic-bezier(0.76, 0, 0.24, 1);

  --transition-fast: 0.3s var(--ease-out-expo);
  --transition-med: 0.6s var(--ease-out-expo);
  --transition-slow: 1s var(--ease-out-expo);

  --gutter: clamp(16px, 2vw, 32px);
  --section-pad: clamp(60px, 10vh, 140px);
}

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

html {
  font-size: 16px;
  scroll-behavior: auto; /* GSAP handles smooth scroll */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  font-family: var(--ff-primary);
  font-weight: var(--fw-regular);
  color: var(--c-fg);
  background-color: var(--c-bg);
  line-height: var(--lh-normal);
  cursor: none;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  cursor: none;
}

button, input, textarea {
  font-family: inherit;
  cursor: none;
  border: none;
  outline: none;
  background: none;
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

ul, ol {
  list-style: none;
}

::selection {
  background: var(--c-fg);
  color: var(--c-bg);
}

/* --- Custom Cursor --- */
.cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--c-bg);
  pointer-events: none;
  z-index: 10000;
  mix-blend-mode: difference;
  transform: translate(-50%, -50%);
  transition: width 0.4s var(--ease-out-expo),
              height 0.4s var(--ease-out-expo);
  will-change: transform;
}

.cursor.is-active {
  width: 80px;
  height: 80px;
}

.cursor.is-active .cursor__label {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.cursor__label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.5);
  font-size: 11px;
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--c-bg);
  mix-blend-mode: normal;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s var(--ease-out-expo);
  white-space: nowrap;
  pointer-events: none;
}

/* Hide custom cursor on touch */
@media (hover: none) and (pointer: coarse) {
  .cursor { display: none; }
  body { cursor: auto; }
  a, button, input, textarea { cursor: auto; }
}

/* --- Preloader --- */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--c-fg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease;
}

.preloader__logo {
  width: clamp(60px, 12vw, 100px);
  height: clamp(60px, 12vw, 100px);
  color: var(--c-fg-inv);
}

.preloader.is-hidden {
  opacity: 0;
  pointer-events: none;
}

/* --- Header / Nav --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--border);
  transition: transform 0.4s var(--ease-out-expo);
}

.header.is-hidden {
  transform: translateY(-100%);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  height: 60px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header__logo-icon {
  width: 24px;
  height: 24px;
  color: var(--c-fg);
  flex-shrink: 0;
}

.header__logo-text {
  font-size: clamp(1.1rem, 1.5vw, 1.35rem);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
  text-transform: lowercase;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 48px);
}

.header__nav a {
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  position: relative;
  padding: 4px 0;
}

.header__nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--c-fg);
  transition: width var(--transition-fast);
}

.header__nav a:hover::after {
  width: 100%;
}

/* Header actions group (lang toggle + hamburger) */
.header__actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Language Toggle Button */
.header__lang {
  font-family: 'Courier New', Courier, monospace;
  font-size: 11px;
  font-weight: var(--fw-bold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--c-fg);
  padding: 4px 10px;
  border-radius: 2px;
  background: transparent;
  color: var(--c-fg);
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    transform 0.2s ease;
  position: relative;
  overflow: hidden;
  cursor: none;
}

.header__lang:hover {
  background: var(--c-fg);
  color: var(--c-bg);
  transform: translateY(-1px);
}

.header__lang:active {
  transform: translateY(0);
}

/* Mobile nav toggle */
.header__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
}

.header__toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--c-fg);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* --- Mobile Menu Overlay --- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--c-fg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.mobile-menu.is-open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu a {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: var(--fw-black);
  color: var(--c-fg-inv);
  letter-spacing: var(--ls-tight);
  text-transform: lowercase;
  transition: opacity 0.3s ease;
}

.mobile-menu a:hover {
  opacity: 0.5;
}

@media (max-width: 768px) {
  .header__nav { display: none; }
  .header__toggle { display: flex; }
  .header__lang {
    font-size: 10px;
    padding: 3px 8px;
  }
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border-bottom: var(--border);
  padding: 120px var(--gutter) var(--section-pad);
  position: relative;
}

.hero__title {
  font-size: var(--fs-display);
  font-weight: var(--fw-black);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  text-transform: uppercase;
  max-width: 14ch;
}

.hero__title .line {
  display: block;
  overflow: hidden;
  /* Extra room above so Ñ tildes / accents are not clipped */
  padding-top: 0.15em;
  margin-top: -0.15em;
}

.hero__title .line__inner {
  display: block;
  transform: translateY(110%);
  /* Prevent bottom descenders clipping too */
  padding-bottom: 0.05em;
}

.hero__bottom {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gutter);
  margin-top: clamp(40px, 6vh, 80px);
  padding-top: clamp(24px, 3vh, 40px);
  border-top: var(--border);
}

.hero__desc {
  font-size: var(--fs-body);
  line-height: 1.65;
  max-width: 48ch;
  opacity: 0;
  transform: translateY(24px);
}

.hero__cta-wrap {
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
}

.btn-magnetic {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 40px;
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  border: var(--border);
  background: transparent;
  transition: background var(--transition-fast), color var(--transition-fast);
  overflow: hidden;
}

.btn-magnetic::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--c-fg);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.5s var(--ease-out-expo);
  z-index: -1;
}

.btn-magnetic:hover::before {
  transform: scaleY(1);
}

.btn-magnetic:hover {
  color: var(--c-bg);
}

.btn-magnetic__arrow {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
}

.btn-magnetic:hover .btn-magnetic__arrow {
  transform: translate(4px, -4px);
}

@media (max-width: 768px) {
  .hero__bottom {
    grid-template-columns: 1fr;
  }
  .hero__cta-wrap {
    justify-content: flex-start;
  }
}

/* --- Marquee --- */
.marquee {
  border-bottom: var(--border);
  overflow: hidden;
  padding: clamp(16px, 2.5vh, 28px) 0;
  white-space: nowrap;
  position: relative;
}

.marquee__track {
  display: flex;
  gap: 0;
  width: max-content;
  will-change: transform;
}

.marquee__item {
  display: inline-flex;
  align-items: center;
  gap: clamp(24px, 4vw, 60px);
  padding: 0 clamp(12px, 2vw, 30px);
  font-size: clamp(1rem, 2vw, 1.6rem);
  font-weight: var(--fw-black);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  flex-shrink: 0;
}

.marquee__item::before {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-fg);
  flex-shrink: 0;
}

/* --- Services Section --- */
.services {
  border-bottom: var(--border);
}

.services__header {
  padding: var(--section-pad) var(--gutter) clamp(32px, 5vh, 60px);
  border-bottom: var(--border);
}

.services__label {
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(16px);
}

.services__title {
  font-size: var(--fs-h2);
  font-weight: var(--fw-black);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  text-transform: uppercase;
}

.services__title .line {
  display: block;
  overflow: hidden;
  padding-top: 0.15em;
  margin-top: -0.15em;
}

.services__title .line__inner {
  display: block;
  transform: translateY(110%);
  padding-bottom: 0.05em;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .services__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .services__grid { grid-template-columns: 1fr; }
}

.service-card {
  padding: clamp(28px, 4vw, 48px) var(--gutter);
  border-right: var(--border);
  border-bottom: var(--border);
  position: relative;
  overflow: hidden;
  transition: background 0.3s ease, color 0.3s ease;
  min-height: clamp(260px, 30vh, 380px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.service-card:last-child {
  border-right: none;
}

@media (max-width: 1024px) {
  .service-card:nth-child(2n) { border-right: none; }
}

@media (max-width: 600px) {
  .service-card { border-right: none; }
}

.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--c-fg);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.5s var(--ease-out-expo);
  z-index: 0;
}

.service-card:hover::before {
  transform: scaleY(1);
}

.service-card:hover {
  color: var(--c-bg);
}

.service-card__index {
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

.service-card__content {
  position: relative;
  z-index: 1;
}

.service-card__title {
  font-size: var(--fs-h3);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.service-card__desc {
  font-size: var(--fs-small);
  line-height: 1.6;
  opacity: 0.7;
  max-width: 30ch;
}

/* --- Calculator Section --- */
.calculator {
  border-bottom: var(--border);
}

.calculator__header {
  padding: var(--section-pad) var(--gutter) clamp(32px, 5vh, 60px);
  border-bottom: var(--border);
}

.calculator__label {
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(16px);
}

.calculator__title {
  font-size: var(--fs-h2);
  font-weight: var(--fw-black);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  text-transform: uppercase;
}

.calculator__title .line {
  display: block;
  overflow: hidden;
  padding-top: 0.15em;
  margin-top: -0.15em;
}

.calculator__title .line__inner {
  display: block;
  transform: translateY(110%);
  padding-bottom: 0.05em;
}

.calculator__inner {
  display: grid;
  grid-template-columns: 2.2fr 1.2fr;
}

@media (max-width: 900px) {
  .calculator__inner {
    grid-template-columns: 1fr;
  }
}

.calculator__main {
  border-right: var(--border);
}

@media (max-width: 900px) {
  .calculator__main {
    border-right: none;
    border-bottom: var(--border);
  }
}

.calculator__intro {
  padding: 40px var(--gutter) clamp(24px, 3vh, 40px) var(--gutter);
  font-size: var(--fs-body);
  line-height: 1.6;
  opacity: 0.7;
  max-width: 65ch;
  border-bottom: var(--border);
}

.calculator__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 600px) {
  .calculator__grid {
    grid-template-columns: 1fr;
  }
}

.calc-card {
  padding: clamp(28px, 4vw, 44px) var(--gutter);
  border-right: var(--border);
  border-bottom: var(--border);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: clamp(280px, 32vh, 360px);
  background: var(--c-bg);
  color: var(--c-fg);
  transition: background 0.4s var(--ease-out-expo), color 0.4s var(--ease-out-expo);
  user-select: none;
}

.calc-card:nth-child(2n) {
  border-right: none;
}

@media (max-width: 600px) {
  .calc-card {
    border-right: none;
    min-height: auto;
    gap: 32px;
  }
}

.calc-card.is-selected {
  background: var(--c-fg);
  color: var(--c-bg);
}

.calc-card__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.calc-card__price {
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
}

.calc-card__price small {
  font-size: 0.65em;
  font-weight: var(--fw-bold);
  opacity: 0.6;
}

.calc-card__checkbox {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: var(--border);
  position: relative;
  transition: border-color 0.4s var(--ease-out-expo);
  flex-shrink: 0;
}

.calc-card__checkbox::after {
  content: '';
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: var(--c-fg);
  transform: scale(0);
  transition: transform 0.4s var(--ease-out-expo);
}

.calc-card.is-selected .calc-card__checkbox {
  border-color: var(--c-bg);
}

.calc-card.is-selected .calc-card__checkbox::after {
  background: var(--c-bg);
  transform: scale(1);
}

.calc-card__content {
  margin-top: 24px;
}

.calc-card__title {
  font-size: var(--fs-h3);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.calc-card__desc {
  font-size: var(--fs-small);
  line-height: 1.65;
  opacity: 0.65;
  max-width: 32ch;
  margin-bottom: 24px;
  transition: opacity 0.4s var(--ease-out-expo);
}

.calc-card.is-selected .calc-card__desc {
  opacity: 0.8;
}

.calc-card__tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.calc-card__tags span {
  font-size: var(--fs-micro);
  font-weight: var(--fw-regular);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  padding: 4px 10px;
  border: var(--border);
  transition: border-color 0.4s var(--ease-out-expo);
}

.calc-card.is-selected .calc-card__tags span {
  border-color: rgba(255, 255, 255, 0.25);
}

.calculator__sidebar {
  padding: 40px var(--gutter);
  position: relative;
}

@media (min-width: 901px) {
  .calculator__sidebar {
    position: sticky;
    top: 60px;
    align-self: start;
    height: calc(100vh - 60px);
    display: flex;
    flex-direction: column;
  }
}

.calculator__summary {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.summary-title {
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  margin-bottom: clamp(20px, 3vh, 32px);
  opacity: 0.5;
}

.summary-total {
  border-bottom: var(--border);
  padding-bottom: clamp(24px, 3vh, 40px);
  margin-bottom: clamp(24px, 3vh, 40px);
}

.summary-total__label {
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  display: block;
  margin-bottom: 8px;
  opacity: 0.6;
}

.summary-total__val {
  font-size: clamp(2.5rem, 3.5vw, 4rem);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
  line-height: 1;
}

.summary-details {
  flex-grow: 1;
  margin-bottom: 24px;
  overflow-y: auto;
  max-height: 250px;
}

@media (min-width: 901px) {
  .summary-details {
    max-height: none;
  }
}

.summary-details__empty {
  font-size: var(--fs-small);
  opacity: 0.5;
  font-style: italic;
}

.summary-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  font-size: var(--fs-small);
  animation: calcFadeIn 0.4s var(--ease-out-expo) forwards;
}

.summary-item__name {
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-normal);
  max-width: 70%;
}

.summary-item__price {
  font-weight: var(--fw-bold);
}

.summary-disclaimer {
  font-size: var(--fs-micro);
  line-height: 1.5;
  opacity: 0.5;
  margin-bottom: clamp(24px, 3vh, 40px);
}

.summary-action {
  margin-top: auto;
}

.summary-action .btn-magnetic {
  width: 100%;
  justify-content: center;
}

.btn-magnetic[disabled] {
  opacity: 0.2;
  pointer-events: none;
  cursor: not-allowed;
}

@keyframes calcFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Infrastructure Sub-panel Styles --- */
.calc-infra {
  padding: clamp(24px, 3vh, 36px) var(--gutter);
  border-top: var(--border);
  border-bottom: var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  background: var(--c-bg);
  transition: opacity 0.4s var(--ease-out-expo), 
              transform 0.4s var(--ease-out-expo), 
              max-height 0.4s var(--ease-out-expo), 
              padding 0.4s var(--ease-out-expo);
  max-height: 500px;
  overflow: hidden;
  will-change: opacity, transform, max-height;
}

.calc-infra.is-hidden {
  opacity: 0;
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  border-top: none;
  border-bottom: none;
  transform: translateY(-16px);
  pointer-events: none;
}

@media (max-width: 768px) {
  .calc-infra {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
}

.calc-infra__header {
  max-width: 50ch;
}

.calc-infra__title {
  font-size: clamp(0.95rem, 1.2vw, 1.1rem);
  font-weight: var(--fw-black);
  text-transform: uppercase;
  letter-spacing: var(--ls-tight);
  margin-bottom: 6px;
}

.calc-infra__desc {
  font-size: var(--fs-small);
  line-height: 1.5;
  opacity: 0.6;
}

.calc-infra__options {
  display: flex;
  gap: var(--gutter);
  flex-shrink: 0;
}

@media (max-width: 480px) {
  .calc-infra__options {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
}

.calc-infra__option {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  cursor: none;
  user-select: none;
}

.calc-infra__box {
  width: 18px;
  height: 18px;
  border: var(--border);
  position: relative;
  transition: background-color 0.3s var(--ease-out-expo), border-color 0.3s var(--ease-out-expo);
  flex-shrink: 0;
}

.calc-infra__box::after {
  content: '';
  position: absolute;
  inset: 4px;
  background: var(--c-bg);
  transform: scale(0);
  transition: transform 0.3s var(--ease-out-expo);
}

.calc-infra__option input:checked ~ .calc-infra__box {
  background: var(--c-fg);
}

.calc-infra__option input:checked ~ .calc-infra__box::after {
  transform: scale(1);
}

/* --- Calculator Tabs Switcher --- */
.calculator__tabs {
  display: flex;
  border-bottom: var(--border);
  background: var(--c-bg);
}

.calc-tab-btn {
  flex: 1;
  padding: 20px var(--gutter);
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  text-align: center;
  border-right: var(--border);
  transition: background-color 0.4s var(--ease-out-expo), color 0.4s var(--ease-out-expo);
  cursor: none;
}

.calc-tab-btn:last-child {
  border-right: none;
}

.calc-tab-btn.is-active {
  background: var(--c-fg);
  color: var(--c-bg);
}

/* --- Tab Content Visibility --- */
.calculator__tab-content {
  display: none;
  animation: calcTabFade 0.5s var(--ease-out-expo) forwards;
}

.calculator__tab-content.is-active {
  display: block;
}

@keyframes calcTabFade {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Naming Addon (inside Card 1) --- */
.calc-card__addon {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed rgba(0, 0, 0, 0.15);
  display: none;
  animation: calcFadeIn 0.4s var(--ease-out-expo) forwards;
}

.calc-card.is-selected .calc-card__addon {
  display: block;
  border-top-color: rgba(255, 255, 255, 0.2);
}

.calc-addon-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  cursor: none;
  user-select: none;
}

.calc-addon-checkbox {
  width: 14px;
  height: 14px;
  border: var(--border);
  position: relative;
  flex-shrink: 0;
  transition: border-color 0.4s var(--ease-out-expo);
}

.calc-card.is-selected .calc-addon-checkbox {
  border-color: var(--c-bg);
}

.calc-addon-checkbox::after {
  content: '';
  position: absolute;
  inset: 3px;
  background: var(--c-fg);
  transform: scale(0);
  transition: transform 0.3s var(--ease-out-expo);
}

.calc-card.is-selected .calc-addon-checkbox::after {
  background: var(--c-bg);
}

.calc-addon-label input:checked ~ .calc-addon-checkbox::after {
  transform: scale(1);
}

/* --- Hourly Slider Control --- */
.calc-hours-control {
  margin-top: 16px;
  margin-bottom: 20px;
  padding: 16px;
  border: var(--border);
  background: var(--c-bg);
  color: var(--c-fg);
  transition: border-color 0.4s var(--ease-out-expo), background-color 0.4s var(--ease-out-expo), color 0.4s var(--ease-out-expo);
}

.calc-card.is-selected .calc-hours-control {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.05);
  color: var(--c-bg);
}

.calc-hours-label {
  display: flex;
  justify-content: space-between;
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  margin-bottom: 12px;
}

.calc-hours-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: rgba(0, 0, 0, 0.15);
  outline: none;
  transition: background 0.3s;
}

.calc-card.is-selected .calc-hours-slider {
  background: rgba(255, 255, 255, 0.2);
}

.calc-hours-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-fg);
  border: var(--border);
  cursor: none;
}

.calc-card.is-selected .calc-hours-slider::-webkit-slider-thumb {
  background: var(--c-bg);
  border-color: var(--c-bg);
}

.calc-hours-slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-fg);
  border: var(--border);
  cursor: none;
}

.calc-card.is-selected .calc-hours-slider::-moz-range-thumb {
  background: var(--c-bg);
  border-color: var(--c-bg);
}

/* --- Commercial Terms in Sidebar --- */
.summary-terms {
  margin-top: 16px;
  padding-top: 14px;
  border-top: var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.summary-terms span {
  display: block;
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  opacity: 0.6;
  line-height: 1.4;
}

/* --- Dark / Inverted Section (About) --- */
.about {
  background: var(--c-bg-inv);
  color: var(--c-fg-inv);
  border-bottom: var(--border-inv);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 60vh;
}

@media (max-width: 768px) {
  .about__inner { grid-template-columns: 1fr; }
}

.about__left {
  padding: var(--section-pad) var(--gutter);
  border-right: var(--border-inv);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

@media (max-width: 768px) {
  .about__left { border-right: none; border-bottom: var(--border-inv); }
}

.about__label {
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(16px);
}

.about__title {
  font-size: var(--fs-h1);
  font-weight: var(--fw-black);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  text-transform: uppercase;
}

.about__title .line {
  display: block;
  overflow: hidden;
  padding-top: 0.15em;
  margin-top: -0.15em;
}

.about__title .line__inner {
  display: block;
  transform: translateY(110%);
  padding-bottom: 0.05em;
}

.about__right {
  padding: var(--section-pad) var(--gutter);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 32px;
}

.about__text {
  font-size: var(--fs-body);
  line-height: 1.7;
  opacity: 0.75;
  max-width: 50ch;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
  padding-top: 32px;
  border-top: var(--border-inv);
}

.about__stat-num {
  font-size: var(--fs-h2);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
  line-height: 1;
}

.about__stat-label {
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  margin-top: 8px;
  opacity: 0.6;
}

/* --- Contact Section --- */
.contact {
  border-bottom: var(--border);
}

.contact__header {
  padding: var(--section-pad) var(--gutter) clamp(32px, 5vh, 60px);
  border-bottom: var(--border);
}

.contact__label {
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(16px);
}

.contact__title {
  font-size: var(--fs-h1);
  font-weight: var(--fw-black);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  text-transform: uppercase;
}

.contact__title .line {
  display: block;
  overflow: hidden;
  padding-top: 0.15em;
  margin-top: -0.15em;
}

.contact__title .line__inner {
  display: block;
  transform: translateY(110%);
  padding-bottom: 0.05em;
}

.contact__form {
  padding: clamp(40px, 6vh, 80px) var(--gutter);
  max-width: 800px;
}

.form-group {
  position: relative;
  margin-bottom: clamp(32px, 5vh, 56px);
}

.form-group__label {
  display: block;
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  margin-bottom: 12px;
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

.form-group__input {
  width: 100%;
  font-size: clamp(1.2rem, 2.5vw, 2rem);
  font-weight: var(--fw-bold);
  padding: 12px 0;
  border-bottom: var(--border);
  background: transparent;
  transition: border-color 0.3s ease;
}

.form-group__input::placeholder {
  color: rgba(0,0,0,0.2);
}

.form-group__input:focus {
  border-bottom-color: var(--c-fg);
}

.form-group:focus-within .form-group__label {
  opacity: 1;
}

textarea.form-group__input {
  resize: vertical;
  min-height: 80px;
  line-height: 1.4;
}

.contact__submit {
  padding: 0 var(--gutter);
  padding-bottom: clamp(40px, 6vh, 80px);
}

/* --- Footer --- */
.footer {
  background: var(--c-bg);
}

.footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--gutter);
  padding: clamp(40px, 6vh, 80px) var(--gutter);
  border-top: var(--border);
}

@media (max-width: 768px) {
  .footer__top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .footer__top { grid-template-columns: 1fr; }
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer__logo-icon {
  width: clamp(28px, 4vw, 36px);
  height: clamp(28px, 4vw, 36px);
  color: var(--c-fg);
  flex-shrink: 0;
}

.footer__logo-text {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
}

.footer__col-title {
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  margin-bottom: 20px;
  opacity: 0.5;
}

.footer__col a,
.footer__col p {
  display: block;
  font-size: var(--fs-small);
  line-height: 2;
  transition: opacity 0.3s ease;
}

.footer__col a:hover {
  opacity: 0.5;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px var(--gutter);
  border-top: var(--border);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  opacity: 0.5;
}

@media (max-width: 600px) {
  .footer__bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* --- Scroll Reveal Utility --- */
.reveal-text .line__inner {
  transform: translateY(110%);
  will-change: transform;
}

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  will-change: opacity, transform;
}

/* --- Smooth Scrollbar Override --- */
html.has-scroll-smooth {
  overflow: hidden;
}

/* --- Utility --- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}