/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-primary: #3B5BDB;
  --color-primary-dark: #2B4ACB;
  --color-primary-light: #EDF2FF;
  --color-accent: #0CA678;
  --color-accent-light: #E6FCF5;
  --color-danger: #E03131;
  --color-danger-light: #FFF5F5;
  --color-warning: #F08C00;
  --color-warning-light: #FFF9DB;

  --color-text: #212529;
  --color-text-secondary: #495057;
  --color-text-muted: #868E96;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F8F9FA;
  --color-bg-warm: #FFFBF7;
  --color-border: #DEE2E6;
  --color-border-light: #E9ECEF;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.75rem;
  --font-size-5xl: 3.5rem;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.1);
  --shadow-xl: 0 12px 40px rgba(0,0,0,0.12);

  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-dark); }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn--outline:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn--lg {
  padding: 16px 32px;
  font-size: var(--font-size-lg);
}

.btn--block {
  width: 100%;
}

/* ===== SECTION TITLES ===== */
.section__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.section__title--left { text-align: left; }

.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}
.section__subtitle--left {
  text-align: left;
  margin-left: 0;
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition);
}
.header--scrolled {
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-text);
}
.logo__icon {
  font-size: 24px;
}
.logo__text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  gap: 32px;
}
.nav__link {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition);
}
.nav__link:hover {
  color: var(--color-primary);
}

.header__cta {
  padding: 10px 20px;
  font-size: var(--font-size-sm);
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===== HERO ===== */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg) 100%);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero__title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}
.hero__highlight {
  color: var(--color-primary);
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
}

.hero__note {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Hero Demo Card */
.hero__visual {
  display: flex;
  justify-content: center;
}

.hero__demo-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-lg);
  max-width: 480px;
  width: 100%;
}

.demo-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.demo-card__badge {
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.demo-card__badge--source {
  background: #EDF2FF;
  color: var(--color-primary);
}
.demo-card__time {
  font-size: 13px;
  color: var(--color-text-muted);
}

.demo-card__original,
.demo-card__result {
  padding: 16px;
  border-radius: var(--radius-sm);
}
.demo-card__original {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border-light);
}
.demo-card__result {
  background: var(--color-primary-light);
  border: 1px solid #C5D5F6;
}

.demo-card__label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}
.demo-card__result .demo-card__label {
  color: var(--color-primary);
}
.demo-card__text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.demo-card__arrow {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  padding: 12px 0;
  color: var(--color-primary);
}
.demo-card__arrow-icon {
  font-size: 20px;
  font-weight: 700;
  animation: bounce 2s infinite;
}
.demo-card__arrow-label {
  font-size: 13px;
  font-weight: 600;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(4px); }
}

.demo-card__footer {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-light);
}
.demo-card__check {
  font-size: 13px;
  font-weight: 500;
}
.demo-card__check--ok {
  color: var(--color-accent);
}

/* ===== PROBLEM ===== */
.problem {
  padding: 96px 0;
  background: var(--color-bg);
}

.problem__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.problem__card {
  padding: 32px 24px;
  border-radius: var(--radius-md);
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
}
.problem__card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.problem__icon {
  font-size: 32px;
  display: block;
  margin-bottom: 16px;
}
.problem__heading {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 8px;
}
.problem__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== HOW IT WORKS ===== */
.how {
  padding: 96px 0;
  background: var(--color-bg-soft);
}

.how__steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-top: 24px;
}

.how__step {
  flex: 1;
  text-align: center;
  padding: 0 24px;
}

.how__step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: var(--font-size-xl);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.how__step-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: 12px;
}
.how__step-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.how__step-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.how__step-features li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  position: relative;
  padding-left: 20px;
}
.how__step-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.how__connector {
  width: 60px;
  height: 2px;
  background: var(--color-border);
  margin-top: 28px;
  flex-shrink: 0;
  position: relative;
}
.how__connector::after {
  content: '→';
  position: absolute;
  right: -4px;
  top: -10px;
  color: var(--color-border);
  font-size: 18px;
}

/* ===== FOR WHOM (TABS) ===== */
.for-whom {
  padding: 96px 0;
  background: var(--color-bg);
}

.tabs__nav {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
}

.tabs__btn {
  padding: 12px 24px;
  border: 2px solid var(--color-border-light);
  border-radius: 100px;
  background: var(--color-bg);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}
.tabs__btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.tabs__btn--active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.tabs__panel {
  display: none;
}
.tabs__panel--active {
  display: block;
  animation: fadeIn 0.3s ease;
}

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

.tabs__panel-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  background: var(--color-bg-soft);
  border-radius: var(--radius-lg);
  padding: 48px;
  border: 1px solid var(--color-border-light);
}

.tabs__panel-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: 12px;
}
.tabs__panel-quote {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: 24px;
  padding-left: 16px;
  border-left: 3px solid var(--color-primary);
}

.tabs__panel-benefits {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}
.tabs__panel-benefits li {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  padding-left: 28px;
  position: relative;
}
.tabs__panel-benefits li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}
.tabs__panel-benefits li strong {
  color: var(--color-text);
}

/* Stat Card */
.stat-card {
  background: var(--color-bg);
  padding: 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}
.stat-card__number {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}
.stat-card__label {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.stat-card__bar {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.stat-card__bar-old,
.stat-card__bar-new {
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 600;
}
.stat-card__bar-old {
  background: var(--color-danger-light);
  color: var(--color-danger);
}
.stat-card__bar-new {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

/* ===== NUMBERS ===== */
.numbers {
  padding: 72px 0;
  background: var(--color-primary);
}

.numbers__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.numbers__item {
  text-align: center;
}
.numbers__value {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.numbers__label {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.75);
}

/* ===== COMPARISON TABLE ===== */
.compare {
  padding: 96px 0;
  background: var(--color-bg-soft);
}

.compare__table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.compare__table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: var(--font-size-sm);
}

.compare__table th,
.compare__table td {
  padding: 16px 20px;
  text-align: center;
  border-bottom: 1px solid var(--color-border-light);
}

.compare__table th {
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-bottom: 20px;
}

.compare__table td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--color-text);
}

.compare__highlight {
  background: var(--color-primary-light) !important;
  position: relative;
}
.compare__table th.compare__highlight {
  color: var(--color-primary);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.compare__table tbody tr:last-child td.compare__highlight {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.compare__yes { color: var(--color-accent); }
.compare__no { color: var(--color-danger); }
.compare__maybe { color: var(--color-warning); }

.compare__label {
  white-space: nowrap;
}

/* ===== PRICING ===== */
.pricing {
  padding: 96px 0;
  background: var(--color-bg);
}

.pricing__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing__card {
  background: var(--color-bg);
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  position: relative;
}
.pricing__card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
}

.pricing__card--featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: scale(1.03);
}
.pricing__card--featured:hover {
  box-shadow: var(--shadow-xl);
}

.pricing__badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  padding: 6px 20px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
}

.pricing__plan {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: 4px;
}
.pricing__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.pricing__price {
  margin-bottom: 32px;
}
.pricing__amount {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
}
.pricing__currency {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  font-weight: 500;
}

.pricing__features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  flex-grow: 1;
}
.pricing__features li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding-left: 24px;
  position: relative;
}
.pricing__features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* ===== CALCULATOR ===== */
.calculator {
  padding: 96px 0;
  background: var(--color-bg-soft);
}

.calculator__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.calculator__form {
  background: var(--color-bg);
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-md);
}

.calculator__field {
  margin-bottom: 32px;
}
.calculator__label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}
.calculator__input {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  border-radius: 4px;
  background: var(--color-border-light);
  outline: none;
  cursor: pointer;
}
.calculator__input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(59,91,219,0.3);
  transition: transform var(--transition);
}
.calculator__input::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}
.calculator__input::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 6px rgba(59,91,219,0.3);
}
.calculator__value {
  text-align: center;
  margin-top: 8px;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

.calculator__results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 8px;
}
.calculator__result {
  padding: 20px;
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  text-align: center;
}
.calculator__result-label {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}
.calculator__result-value {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-accent);
}

/* ===== FAQ ===== */
.faq {
  padding: 96px 0;
  background: var(--color-bg);
}

.faq__list {
  max-width: 768px;
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--color-border-light);
}

.faq__question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
  background: none;
  border: none;
  font-family: var(--font-family);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  text-align: left;
  transition: color var(--transition);
}
.faq__question:hover {
  color: var(--color-primary);
}

.faq__icon {
  font-size: 24px;
  font-weight: 400;
  color: var(--color-text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq__item--open .faq__icon {
  transform: rotate(45deg);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}
.faq__item--open .faq__answer {
  max-height: 300px;
  padding-bottom: 20px;
}
.faq__answer p {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ===== DEMO CTA ===== */
.demo {
  padding: 96px 0;
  background: linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-primary-light) 100%);
}

.demo__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.demo__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.demo__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.demo__benefits {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.demo__benefits li {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  padding-left: 28px;
  position: relative;
}
.demo__benefits li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.demo__form {
  background: var(--color-bg);
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-lg);
}

.demo__form-group {
  margin-bottom: 20px;
}
.demo__label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}
.demo__input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  transition: border-color var(--transition);
  outline: none;
}
.demo__input:focus {
  border-color: var(--color-primary);
}
.demo__input::placeholder {
  color: var(--color-text-muted);
}

.demo__note {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: 16px;
}
.demo__note a {
  font-weight: 600;
}

/* ===== FOOTER ===== */
.footer {
  padding: 64px 0 32px;
  background: var(--color-text);
  color: rgba(255,255,255,0.7);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
}

.footer__brand {
  flex: 1;
  min-width: 250px;
}
.footer__brand .logo__text {
  color: #fff;
}
.footer__tagline {
  margin-top: 12px;
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.5);
}

.footer__links {
  display: flex;
  gap: 64px;
}

.footer__heading {
  color: #fff;
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__link {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}
.footer__link:hover {
  color: #fff;
}

.footer__bottom {
  width: 100%;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.4);
}

/* ===== RESPONSIVE ===== */

/* --- Tablet --- */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero__title { font-size: var(--font-size-3xl); }
  .hero__visual { order: -1; }

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

  .how__steps { flex-direction: column; align-items: center; }
  .how__connector { width: 2px; height: 40px; margin: 0; }
  .how__connector::after { content: '↓'; right: -8px; top: auto; bottom: -4px; }

  .tabs__panel-inner { grid-template-columns: 1fr; gap: 32px; padding: 32px; }

  .numbers__grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }

  .pricing__grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .pricing__card--featured { transform: none; }

  .calculator__inner { grid-template-columns: 1fr; gap: 32px; }
  .demo__inner { grid-template-columns: 1fr; gap: 32px; }
}

/* --- Mobile --- */
@media (max-width: 768px) {
  /* Nav */
  .nav {
    display: none;
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-md);
    z-index: 99;
  }
  .nav--open { display: flex; }
  .nav__link { font-size: var(--font-size-base); padding: 10px 0; }
  .header__cta { display: none; }
  .burger { display: flex; }

  /* Sections: reduce padding */
  .hero { padding: 100px 0 48px; }
  .problem, .how, .for-whom, .compare, .pricing, .faq, .demo { padding: 56px 0; }
  .calculator { padding: 56px 0; }
  .numbers { padding: 48px 0; }

  /* Hero */
  .hero__title { font-size: var(--font-size-2xl); }
  .hero__subtitle { font-size: var(--font-size-base); }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; }

  /* Section titles */
  .section__title { font-size: var(--font-size-2xl); }
  .section__subtitle { font-size: var(--font-size-base); margin-bottom: 32px; }

  /* Problems */
  .problem__grid { grid-template-columns: 1fr; gap: 16px; }
  .problem__card { padding: 24px 20px; }

  /* Tabs */
  .tabs__nav { flex-direction: column; align-items: stretch; gap: 6px; }
  .tabs__btn { width: 100%; max-width: none; text-align: center; }
  .tabs__panel-inner { padding: 24px; gap: 24px; }
  .stat-card { padding: 24px; }
  .stat-card__number { font-size: var(--font-size-3xl); }

  /* Numbers */
  .numbers__grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .numbers__value { font-size: var(--font-size-2xl); }
  .numbers__label { font-size: 12px; }

  /* Comparison: horizontal scroll + hint */
  .compare__table-wrap {
    position: relative;
    margin: 0 -16px;
    padding: 0 16px;
  }
  .compare__table { font-size: 12px; min-width: 580px; }
  .compare__table th,
  .compare__table td { padding: 10px 8px; }
  .compare__label { font-size: 12px; }

  /* Pricing */
  .pricing__grid { max-width: none; }
  .pricing__card { padding: 28px 20px; }
  .pricing__amount { font-size: var(--font-size-3xl); }

  /* Calculator */
  .calculator__form { padding: 24px; }
  .calculator__results { grid-template-columns: 1fr; }
  .calculator__value { font-size: var(--font-size-xl); }

  /* FAQ */
  .faq__question { font-size: var(--font-size-base); padding: 16px 0; }

  /* Demo */
  .demo__form { padding: 24px; }
  .demo__title { font-size: var(--font-size-2xl); }

  /* Footer */
  .footer { padding: 40px 0 24px; }
  .footer__inner { gap: 32px; }
  .footer__brand { min-width: auto; }
  .footer__links { flex-direction: column; gap: 24px; }
  .footer__bottom { margin-top: 32px; }
}

/* --- Small mobile --- */
@media (max-width: 480px) {
  .container { padding: 0 16px; }

  .hero { padding: 92px 0 40px; }
  .hero__title { font-size: 1.4rem; line-height: 1.25; }
  .hero__subtitle { font-size: 0.9rem; }

  .hero__demo-card { padding: 14px; }
  .demo-card__text { font-size: 13px; }
  .demo-card__footer { flex-direction: column; gap: 6px; }
  .demo-card__header { flex-wrap: wrap; }

  .problem, .how, .for-whom, .compare, .pricing, .faq, .demo, .calculator { padding: 40px 0; }

  .section__title { font-size: 1.3rem; }
  .section__subtitle { font-size: 0.85rem; }

  .how__step { padding: 0 8px; }
  .how__step-number { width: 44px; height: 44px; font-size: var(--font-size-base); }

  .tabs__panel-inner { padding: 16px; }
  .tabs__panel-quote { font-size: var(--font-size-base); padding-left: 12px; }

  .numbers__grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .numbers__value { font-size: 1.2rem; }

  .pricing__card { padding: 24px 16px; }
  .pricing__amount { font-size: var(--font-size-2xl); }

  .calculator__form { padding: 20px; }
  .demo__form { padding: 20px; }
  .demo__title { font-size: 1.3rem; }

  .faq__question { font-size: 0.9rem; gap: 12px; }
  .faq__icon { font-size: 20px; }

  .footer__inner { flex-direction: column; }
}