/* ============================================
   MEMRAIL — Scandinavian Minimal Design System
   ============================================ */

/* CSS Custom Properties */
:root {
  /* Colors - Warm Scandinavian Palette */
  --color-white: #FFFFFF;
  --color-cream: #FAF9F7;
  --color-sand: #F5F1EC;
  --color-beige: #EBE6DF;
  --color-warm-gray: #D4CFC7;

  --color-black: #0A0A0A;
  --color-charcoal: #1A1A1A;
  --color-graphite: #3D3D3D;
  --color-stone: #6B6B6B;
  --color-ash: #9A9A9A;

  /* Typography Scale - Fluid sizing */
  --font-display: 'Satoshi', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Satoshi', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Precise spacing rhythm */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 10rem;

  /* Layout */
  --max-width: 1400px;
  --max-width-narrow: 900px;
  --max-width-text: 720px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 600ms;
}

/* ============================================
   RESET & BASE
   ============================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-charcoal);
  background-color: var(--color-white);
  overflow-x: hidden;
}

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

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-black);
}

/* Hero headline - Massive, confident */
.headline-hero {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 500;
  line-height: 1.0;
  letter-spacing: -0.03em;
}

/* Section headlines */
.headline-section {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

/* Subsection headlines */
.headline-sub {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 500;
  line-height: 1.2;
}

/* Card/tile headlines */
.headline-card {
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.3;
}

/* Body text */
.text-large {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  line-height: 1.6;
  color: var(--color-graphite);
}

.text-body {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-graphite);
}

.text-small {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-stone);
}

/* Eyebrow / Label text */
.eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-stone);
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.container--text {
  max-width: var(--max-width-text);
}

/* Section spacing */
.section {
  padding: var(--space-3xl) 0;
}

.section--compact {
  padding: var(--space-2xl) 0;
}

/* Grid system */
.grid {
  display: grid;
  gap: var(--space-lg);
}

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

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

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

@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid--4, .grid--3, .grid--2 {
    grid-template-columns: 1fr;
  }
}

.card--hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  padding: var(--space-xl);
}

@media (max-width: 768px) {
  .card--hero {
    grid-template-columns: 1fr;
    padding: var(--space-lg);
  }
}

/* Flex utilities */
.flex {
  display: flex;
}

.flex--center {
  align-items: center;
  justify-content: center;
}

.flex--between {
  align-items: center;
  justify-content: space-between;
}

.flex--column {
  flex-direction: column;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* ============================================
   BACKGROUNDS
   ============================================ */

.bg-white { background-color: var(--color-white); }
.bg-cream { background-color: var(--color-cream); }
.bg-sand { background-color: var(--color-sand); }
.bg-beige { background-color: var(--color-beige); }
.bg-black { background-color: var(--color-black); }
.bg-charcoal { background-color: var(--color-charcoal); }

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  transition: all var(--duration-normal) var(--ease-out);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.nav__logo {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-black);
  display: flex;
  align-items: center;
}

.nav__logo-img {
  height: 56px;
  width: auto;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__link {
  font-size: 0.9375rem;
  font-weight: 450;
  color: var(--color-graphite);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav__link:hover {
  color: var(--color-black);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-black);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__dropdown {
  position: relative;
}

.nav__dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.nav__dropdown-trigger svg {
  width: 10px;
  height: 10px;
  transition: transform var(--duration-fast) var(--ease-out);
}

.nav__dropdown:hover .nav__dropdown-trigger svg {
  transform: rotate(180deg);
}

.nav__dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 220px;
  padding: var(--space-sm);
  background: var(--color-white);
  border-radius: 12px;
  box-shadow: 0 20px 60px -10px rgba(0, 0, 0, 0.15),
              0 0 0 1px rgba(0, 0, 0, 0.04);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

.nav__dropdown:hover .nav__dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav__dropdown-item {
  display: block;
  padding: var(--space-sm) var(--space-md);
  border-radius: 8px;
  font-size: 0.9375rem;
  color: var(--color-graphite);
  transition: all var(--duration-fast) var(--ease-out);
}

.nav__dropdown-item:hover {
  background: var(--color-cream);
  color: var(--color-black);
}

.nav__cta-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Mobile nav toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 8px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.nav__toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-black);
  transition: all var(--duration-fast) var(--ease-out);
  transform-origin: center;
}

/* Hamburger → X animation */
.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

@media (max-width: 1024px) {
  .nav__cta-group {
    display: none !important;
  }

  .nav__toggle {
    display: flex;
    position: relative;
    z-index: 2;
  }

  .nav__logo {
    position: relative;
    z-index: 2;
  }

  .nav__menu {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 72px var(--space-md) var(--space-lg);
    background: var(--color-white);
    border-bottom: 1px solid var(--color-sand);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
    max-height: 100dvh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav__menu.is-open {
    display: flex;
  }

  .nav__link {
    display: flex;
    align-items: center;
    padding: 0.75rem 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-black);
    border-bottom: 1px solid var(--color-sand);
  }

  .nav__link::after {
    display: none;
  }

  .nav__dropdown {
    border-bottom: 1px solid var(--color-sand);
  }

  .nav__dropdown .nav__link {
    border-bottom: none;
  }

  .nav__dropdown-trigger {
    width: 100%;
    justify-content: space-between;
  }

  .nav__dropdown-menu,
  .nav__dropdown:hover .nav__dropdown-menu {
    position: static !important;
    transform: none !important;
    box-shadow: none !important;
    border-radius: 0;
    padding: 0 0 0.75rem var(--space-sm);
    opacity: 1 !important;
    visibility: visible !important;
    display: none;
    min-width: 0;
    background: transparent;
    left: auto;
    top: auto;
  }

  .nav__dropdown.is-open .nav__dropdown-menu {
    display: block !important;
  }

  .nav__dropdown-trigger svg {
    transition: transform var(--duration-fast) var(--ease-out);
  }

  /* Override desktop :hover rule — only .is-open controls arrow on mobile */
  .nav__dropdown:hover .nav__dropdown-trigger svg {
    transform: none;
  }

  .nav__dropdown.is-open .nav__dropdown-trigger svg {
    transform: rotate(180deg);
  }

  .nav__dropdown-item {
    padding: 0.5rem 0;
    font-size: 0.9375rem;
    color: var(--color-graphite);
  }

  .nav__dropdown-item:hover {
    background: none;
    color: var(--color-black);
  }

  .nav__mobile-cta {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-top: var(--space-md);
    margin-top: var(--space-sm);
  }

  .nav__mobile-cta .btn {
    width: 100%;
    justify-content: center;
  }

  /* Dark variant */
  .nav--dark .nav__menu {
    background: var(--color-black);
    border-bottom-color: rgba(255, 255, 255, 0.06);
  }

  .nav--dark .nav__menu .nav__link {
    color: var(--color-white);
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }

  .nav--dark .nav__menu .nav__dropdown {
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }

  .nav--dark .nav__menu .nav__dropdown-item {
    color: rgba(255, 255, 255, 0.6);
  }

  .nav--dark .nav__menu .nav__dropdown-item:hover {
    color: var(--color-white);
  }

  .nav--dark .nav__dropdown-menu {
    background: transparent;
  }

  .nav--dark .nav__mobile-cta {
    border-top-color: rgba(255, 255, 255, 0.08);
  }
}

/* Hide mobile CTA on desktop */
@media (min-width: 1025px) {
  .nav__mobile-cta {
    display: none !important;
  }
}

/* Lock scroll when mobile nav is open */
body.nav-open {
  overflow: hidden;
}

body.nav-open .nav {
  background: transparent;
  border-bottom-color: transparent;
  box-shadow: none !important;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

body.nav-open .nav--dark {
  background: transparent;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 100px;
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-black);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-charcoal);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px -8px rgba(0, 0, 0, 0.3);
}

.btn--secondary {
  background: transparent;
  color: var(--color-black);
  border: 1px solid var(--color-warm-gray);
}

.btn--secondary:hover {
  border-color: var(--color-black);
  background: var(--color-cream);
}

.btn--ghost {
  background: transparent;
  color: var(--color-graphite);
  padding: 0.5rem 0;
}

.btn--ghost:hover {
  color: var(--color-black);
}

.btn--large {
  padding: 1.125rem 2.5rem;
  font-size: 1rem;
}

.btn--small {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
}

/* Arrow animation */
.btn__arrow {
  transition: transform var(--duration-fast) var(--ease-out);
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  position: relative;
  overflow: hidden;
}

.hero__content {
  position: relative;
  z-index: 2;
}

.hero__eyebrow {
  margin-bottom: var(--space-md);
  animation: fadeInUp 0.8s var(--ease-out) 0.1s both;
}

.hero__headline {
  max-width: 14ch;
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s var(--ease-out) 0.2s both;
}

.hero__description {
  max-width: 540px;
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.8s var(--ease-out) 0.3s both;
}

.hero__cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  animation: fadeInUp 0.8s var(--ease-out) 0.4s both;
}

.hero__cta-group .btn--secondary {
  background: var(--color-white);
}

/* Hero background pattern */
.hero__bg {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 50%;
  background: var(--color-sand);
  clip-path: polygon(20% 0, 100% 0, 100% 100%, 0% 100%);
  z-index: 1;
}

.hero__bg::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 30%;
  width: 300px;
  height: 300px;
  background: var(--color-beige);
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.6;
}

@media (max-width: 1024px) {
  .hero {
    min-height: auto;
    padding: 160px 0 var(--space-3xl);
  }

  .hero__bg {
    width: 100%;
    height: 40%;
    bottom: auto;
    clip-path: none;
    opacity: 0.5;
  }
}

/* ============================================
   SECTION HEADERS
   ============================================ */

.section-header {
  text-align: center;
  max-width: var(--max-width-text);
  margin: 0 auto var(--space-2xl);
}

.section-header--left {
  text-align: left;
  margin-left: 0;
}

.section-header__eyebrow {
  margin-bottom: var(--space-md);
}

.section-header__title {
  margin-bottom: var(--space-md);
}

.section-header__description {
  max-width: 600px;
}

.section-header--left .section-header__description {
  margin-left: 0;
}

/* ============================================
   CARDS
   ============================================ */

.card {
  padding: var(--space-lg);
  background: var(--color-white);
  border-radius: 16px;
  border: 1px solid rgba(0, 0, 0, 0.06);
  transition: all var(--duration-normal) var(--ease-out);
}

.card:hover {
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.1);
  transform: translateY(-4px);
}

.card--flat {
  background: var(--color-cream);
  border: none;
}

.card--flat:hover {
  background: var(--color-sand);
  box-shadow: none;
}

.card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-sand);
  border-radius: 12px;
}

.card__icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-black);
}

.card__title {
  margin-bottom: var(--space-sm);
}

.card__description {
  margin-bottom: var(--space-md);
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-weight: 500;
  color: var(--color-black);
  transition: gap var(--duration-fast) var(--ease-out);
}

.card__link:hover {
  gap: 0.625rem;
}

/* ============================================
   FEATURE BLOCKS
   ============================================ */

.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.feature-block--reverse {
  direction: rtl;
}

.feature-block--reverse > * {
  direction: ltr;
}

.feature-block__content {
  max-width: 540px;
}

.feature-block__visual {
  aspect-ratio: 4/3;
  background: var(--color-sand);
  border-radius: 24px;
  overflow: hidden;
  position: relative;
}

/* Placeholder diagram styles */
.feature-block__diagram {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
}

@media (max-width: 1024px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .feature-block--reverse {
    direction: ltr;
  }

  .feature-block__content {
    max-width: none;
  }
}

/* ============================================
   COMPARISON TABLE
   ============================================ */

.comparison {
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.comparison__row {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.comparison__row:last-child {
  border-bottom: none;
}

.comparison__row--header {
  background: var(--color-charcoal);
  color: var(--color-white);
}

.comparison__cell {
  padding: var(--space-md) var(--space-lg);
}

.comparison__row--header .comparison__cell {
  font-weight: 500;
  font-size: 0.9375rem;
}

.comparison__row:not(.comparison__row--header):nth-child(odd) {
  background: var(--color-white);
}

.comparison__row:not(.comparison__row--header):nth-child(even) {
  background: var(--color-cream);
}

.comparison__label {
  font-weight: 450;
  color: var(--color-black);
}

.comparison__value {
  font-size: 0.9375rem;
  color: var(--color-graphite);
}

.comparison__value--highlight {
  color: var(--color-black);
  font-weight: 500;
}

@media (max-width: 768px) {
  .comparison {
    border: none !important;
    border-radius: 0 !important;
    overflow: visible !important;
    background: none !important;
  }

  /* Transform header into a persistent two-column legend bar */
  .comparison__row--header {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    background: var(--color-charcoal) !important;
    border-radius: 12px !important;
    margin-bottom: var(--space-sm) !important;
    position: sticky !important;
    top: 72px !important;
    z-index: 10 !important;
  }

  .comparison__row--header .comparison__cell:first-child {
    display: none !important;
  }

  .comparison__row--header .comparison__cell {
    padding: 0.625rem var(--space-sm) !important;
    font-size: 0.8125rem !important;
    font-weight: 500 !important;
    text-align: center !important;
  }

  /* Data rows: two-column side-by-side comparison */
  .comparison__row:not(.comparison__row--header) {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    background: var(--color-white) !important;
    border: 1px solid rgba(0, 0, 0, 0.06) !important;
    border-radius: 12px !important;
    margin-bottom: 0.625rem !important;
    padding: 0 !important;
    overflow: hidden !important;
  }

  .comparison__row:last-child {
    margin-bottom: 0 !important;
  }

  .comparison__cell {
    padding: 0 !important;
  }

  /* Row label spans full width */
  .comparison__label {
    grid-column: 1 / -1 !important;
    font-weight: 600 !important;
    font-size: 0.875rem !important;
    color: var(--color-black) !important;
    padding: 0.75rem 1rem !important;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06) !important;
    background: var(--color-cream) !important;
  }

  /* Value cells side by side */
  .comparison__value {
    padding: 0.75rem 1rem !important;
    font-size: 0.8125rem !important;
    line-height: 1.4 !important;
  }

  /* "Without" column — plain */
  .comparison__row:not(.comparison__row--header) .comparison__value:nth-child(2) {
    border-right: 1px solid rgba(0, 0, 0, 0.04) !important;
    color: var(--color-stone) !important;
  }

  /* "With Memrail" column — emphasized */
  .comparison__value--highlight {
    font-weight: 600 !important;
    color: var(--color-black) !important;
    background: rgba(0, 0, 0, 0.015) !important;
  }

  /* Definition-style tables (concept + description, not comparison) */
  .comparison--definitions .comparison__row--header {
    display: none !important;
  }

  .comparison--definitions .comparison__row:not(.comparison__row--header) {
    grid-template-columns: 1fr !important;
    margin-bottom: 0.875rem !important;
  }

  .comparison--definitions .comparison__label {
    border-bottom: none !important;
    background: transparent !important;
    padding: 1rem 1rem 0.25rem !important;
    font-size: 0.9375rem !important;
  }

  .comparison--definitions .comparison__value {
    padding: 0 1rem 1rem !important;
    color: var(--color-graphite) !important;
  }
}

/* ============================================
   CTA SECTIONS
   ============================================ */

.cta-section {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  background: var(--color-charcoal);
  border-radius: 32px;
  color: var(--color-white);
}

.cta-section__title {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.cta-section__description {
  color: rgba(255, 255, 255, 0.7);
  max-width: 540px;
  margin: 0 auto var(--space-xl);
}

.cta-section__buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.cta-section .btn--primary {
  background: var(--color-white);
  color: var(--color-black);
}

.cta-section .btn--primary:hover {
  background: var(--color-cream);
}

.cta-section .btn--secondary {
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--color-white);
}

.cta-section .btn--secondary:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  padding: var(--space-3xl) 0 var(--space-xl);
  background: var(--color-cream);
  margin-top: var(--space-3xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.footer__brand p {
  max-width: 280px;
  margin-top: var(--space-md);
}

.footer__column-title {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-stone);
  margin-bottom: var(--space-md);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  font-size: 0.9375rem;
  color: var(--color-graphite);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer__link:hover {
  color: var(--color-black);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-warm-gray);
}

.footer__legal {
  display: flex;
  gap: var(--space-lg);
}

.footer__social {
  display: none;
  gap: var(--space-md);
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-sand);
  color: var(--color-graphite);
  transition: all var(--duration-fast) var(--ease-out);
}

.footer__social a:hover {
  background: var(--color-black);
  color: var(--color-white);
}

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

  .footer__brand {
    grid-column: span 2;
    margin-bottom: var(--space-lg);
  }
}

@media (max-width: 640px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .footer__brand {
    grid-column: span 1;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Scroll-triggered animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s var(--ease-out),
              transform 0.8s var(--ease-out);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out),
              transform 0.6s var(--ease-out);
}

.stagger-children.is-visible > *:nth-child(1) { transition-delay: 0s; }
.stagger-children.is-visible > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children.is-visible > *:nth-child(3) { transition-delay: 0.2s; }
.stagger-children.is-visible > *:nth-child(4) { transition-delay: 0.3s; }
.stagger-children.is-visible > *:nth-child(5) { transition-delay: 0.4s; }

.stagger-children.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.mx-auto { margin-left: auto; margin-right: auto; }

.hidden { display: none !important; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

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

/* ============================================
   DIAGRAM COMPONENTS (for visual placeholders)
   ============================================ */

.diagram {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-lg);
}

.diagram__box {
  padding: var(--space-md) var(--space-lg);
  background: var(--color-white);
  border-radius: 12px;
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  min-width: 180px;
}

.diagram__box--highlight {
  background: var(--color-charcoal);
  color: var(--color-white);
}

.diagram__arrow {
  width: 2px;
  height: 32px;
  background: var(--color-warm-gray);
  position: relative;
}

.diagram__arrow::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 8px solid var(--color-warm-gray);
}

/* ============================================
   FLOW DIAGRAM (for "How It Works")
   ============================================ */

.flow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  padding: var(--space-xl);
  flex-wrap: wrap;
}

.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  flex: 0 0 auto;
}

.flow-step__number {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border-radius: 50%;
  font-weight: 600;
  font-size: 0.875rem;
}

.flow-step__label {
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
}

.flow-connector {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-warm-gray), transparent);
  position: relative;
}

.flow-connector::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 8px solid var(--color-warm-gray);
}

@media (max-width: 768px) {
  .flow-diagram {
    flex-direction: column;
  }

  .flow-connector {
    width: 2px;
    height: 40px;
    background: linear-gradient(180deg, var(--color-warm-gray), transparent);
  }

  .flow-connector::after {
    right: auto;
    top: auto;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 8px solid var(--color-warm-gray);
    border-bottom: none;
  }
}