/* ==========================================================================
   VertoDigital Design System — main.css
   Complete CSS for the VertoDigital marketing website.
   Light-themed site with dark gradient hero/CTA sections.
   ========================================================================== */

/* ==========================================================================
   1. Custom Properties
   ========================================================================== */

:root {
  /* Primary */
  --color-main-blue: #0066CC;
  --color-dark-blue: #002B55;
  --color-light-blue: #66CCFF;
  --color-deep-navy: #05052A;

  /* Accent (10-15% max) */
  --color-lime: #CFE46B;
  --color-cyan: #3EC7D3;
  --color-purple: #7A4BD1;

  /* Neutral */
  --color-cool-gray: #9EA3AA;
  --color-light-gray: #AFC3D3;
  --color-white: #FFFFFF;
  --color-off-white: #F8FAFC;

  /* Semantic */
  --color-text-primary: #002B55;
  --color-text-secondary: #9EA3AA;
  --color-text-inverse: #FFFFFF;
  --color-link: #0066CC;
  --color-link-hover: #004999;
  --color-border: #E2E8F0;
  --color-focus-ring: #0066CC;

  /* Gradients */
  --gradient-light: linear-gradient(135deg, #66CCFF 0%, #FFFFFF 100%);
  --gradient-feature: linear-gradient(135deg, #0066CC 0%, #3EC7D3 100%);
  --gradient-hero: linear-gradient(135deg, #002B55 0%, #0066CC 100%);
  --gradient-footer: linear-gradient(180deg, #05052A 0%, #0A0A3D 100%);

  /* Typography */
  --font-sans: 'Geist Sans', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Geist Mono', 'SF Mono', 'Fira Code', monospace;
  --weight-regular: 400;
  --weight-medium: 500;

  /* Type scale (mobile-first) */
  --text-h1: 2rem;
  --text-h2: 1.5rem;
  --text-h3: 1.25rem;
  --text-body: 1rem;
  --text-body-lg: 1.125rem;
  --text-small: 0.875rem;
  --text-caption: 0.75rem;
  --text-data: var(--text-body);

  /* Line heights */
  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.6;
  --measure: 70ch;

  /* Spacing (8px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 2.5rem;
  --space-8: 3rem;
  --space-9: 4rem;
  --space-10: 5rem;
  --space-11: 6rem;
  --space-12: 7.5rem;
  --section-padding-y: var(--space-11);
  --section-padding-y-mobile: var(--space-9);

  /* Layout */
  --grid-max-width: 1200px;
  --grid-gutter: 1.5rem;
  --grid-margin: 5rem;
  --grid-margin-tablet: 2.5rem;
  --grid-margin-mobile: 1.25rem;

  /* Shadows & Borders */
  --shadow-sm: 0 1px 2px rgba(0, 43, 85, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 43, 85, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 43, 85, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 43, 85, 0.16);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  --border-width: 1px;
  --border-color: var(--color-border);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Z-index */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
}

@media (min-width: 1024px) {
  :root {
    --text-h1: 3rem;
    --text-h2: 2.25rem;
    --text-h3: 1.5rem;
  }
}


/* ==========================================================================
   2. Reset & Base
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-link-hover);
}

a:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

ul,
ol {
  list-style: none;
}

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

input,
select,
textarea {
  font: inherit;
  color: inherit;
}

fieldset {
  border: none;
}

table {
  border-collapse: collapse;
}

:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}


/* ==========================================================================
   3. Typography
   ========================================================================== */

h1, .h1 {
  font-size: var(--text-h1);
  font-weight: var(--weight-medium);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

h2, .h2 {
  font-size: var(--text-h2);
  font-weight: var(--weight-medium);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

h3, .h3 {
  font-size: var(--text-h3);
  font-weight: var(--weight-medium);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
}

h4, .h4 {
  font-size: var(--text-body-lg);
  font-weight: var(--weight-medium);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
}

p {
  max-width: var(--measure);
  line-height: var(--leading-relaxed);
}

.mono {
  font-family: var(--font-mono);
}

.text-sm {
  font-size: var(--text-small);
}

.text-lg {
  font-size: var(--text-body-lg);
}

.text-caption {
  font-size: var(--text-caption);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-inverse {
  color: var(--color-text-inverse);
}


/* ==========================================================================
   4. Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--grid-max-width);
  margin-inline: auto;
  padding-inline: var(--grid-margin-mobile);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--grid-margin-tablet);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-inline: var(--grid-margin);
  }
}

/* Sections */

.section {
  padding-block: var(--section-padding-y-mobile);
}

@media (min-width: 1024px) {
  .section {
    padding-block: var(--section-padding-y);
  }
}

.section--light {
  background-color: var(--color-white);
}

.section--off-white {
  background-color: var(--color-off-white);
}

.section--gradient-light {
  background: var(--gradient-light);
}

.section--dark {
  background: var(--gradient-hero);
  color: var(--color-text-inverse);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4,
.section--dark p {
  color: var(--color-text-inverse);
}

.section--navy {
  background-color: var(--color-deep-navy);
  color: var(--color-text-inverse);
}

.section--navy h1,
.section--navy h2,
.section--navy h3,
.section--navy h4,
.section--navy p {
  color: var(--color-text-inverse);
}

/* Grid */

.grid {
  display: grid;
  gap: var(--grid-gutter);
}

.grid--2 {
  grid-template-columns: 1fr;
}

.grid--3 {
  grid-template-columns: 1fr;
}

.grid--4 {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

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


/* ==========================================================================
   5. Skip Link
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: var(--z-toast);
  padding: var(--space-3) var(--space-5);
  background-color: var(--color-main-blue);
  color: var(--color-text-inverse);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  color: var(--color-text-inverse);
}


/* ==========================================================================
   6. Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 32px;
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  line-height: 1;
  text-decoration: none;
  border: var(--border-width) solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

/* Primary — blue bg, white text */
.btn--primary {
  background-color: var(--color-main-blue);
  color: var(--color-white);
  border-color: var(--color-main-blue);
}

.btn--primary:hover {
  background-color: var(--color-link-hover);
  border-color: var(--color-link-hover);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

/* Secondary — transparent, white text/border (for dark sections) */
.btn--secondary {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

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

/* Secondary dark — transparent, blue text/border (for light sections) */
.btn--secondary-dark {
  background-color: transparent;
  color: var(--color-main-blue);
  border-color: var(--color-main-blue);
}

.btn--secondary-dark:hover {
  background-color: var(--color-main-blue);
  color: var(--color-white);
}

/* Sizes */
.btn--sm {
  padding: 8px 20px;
  font-size: var(--text-small);
}

.btn--lg {
  padding: 16px 40px;
  font-size: var(--text-body-lg);
}


/* ==========================================================================
   7. Navigation
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background-color: transparent;
  transition:
    background-color var(--transition-base),
    box-shadow var(--transition-base);
}

.site-header--scrolled {
  background-color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--grid-max-width);
  margin-inline: auto;
  padding-inline: var(--grid-margin-mobile);
  height: 72px;
}

@media (min-width: 768px) {
  .nav {
    padding-inline: var(--grid-margin-tablet);
  }
}

@media (min-width: 1024px) {
  .nav {
    padding-inline: var(--grid-margin);
  }
}

.nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav__logo img {
  height: 32px;
  width: auto;
}

/* Light logo (default, for dark/transparent header) */
.nav__logo--light {
  display: block;
}

/* Dark logo (shown when scrolled) */
.nav__logo--dark {
  display: none;
}

.site-header--scrolled .nav__logo--light {
  display: none;
}

.site-header--scrolled .nav__logo--dark {
  display: block;
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-7);
}

@media (min-width: 1024px) {
  .nav__links {
    display: flex;
  }
}

.nav__link {
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--color-white);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-lime);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-lime);
  transition: width var(--transition-base);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

/* Scrolled state nav links */
.site-header--scrolled .nav__link {
  color: var(--color-dark-blue);
}

.site-header--scrolled .nav__link:hover,
.site-header--scrolled .nav__link--active {
  color: var(--color-main-blue);
}

.site-header--scrolled .nav__link::after {
  background-color: var(--color-main-blue);
}

/* Nav CTA */
.nav__cta {
  display: none;
}

@media (min-width: 1024px) {
  .nav__cta {
    display: inline-flex;
  }
}

/* Hamburger */
.nav__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

@media (min-width: 1024px) {
  .nav__hamburger {
    display: none;
  }
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 1px;
  transition:
    transform var(--transition-base),
    opacity var(--transition-base);
}

.site-header--scrolled .nav__hamburger span {
  background-color: var(--color-dark-blue);
}

.nav__hamburger--open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger--open span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger--open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.nav__mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-overlay);
  background-color: var(--color-deep-navy);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-7);
  padding: var(--space-9);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--transition-base),
    visibility var(--transition-base);
}

.nav__mobile-menu--open {
  opacity: 1;
  visibility: visible;
}

.nav__mobile-menu .nav__link {
  font-size: var(--text-h3);
  color: var(--color-white);
}

.nav__mobile-menu .nav__link:hover {
  color: var(--color-lime);
}


/* ==========================================================================
   8. Footer
   ========================================================================== */

.site-footer {
  background: var(--gradient-footer);
  color: var(--color-text-inverse);
  padding-block: var(--section-padding-y);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 1024px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--grid-gutter);
  }
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.footer__brand img {
  height: 32px;
  width: auto;
}

.footer__tagline {
  font-size: var(--text-small);
  color: var(--color-light-gray);
  line-height: var(--leading-relaxed);
  max-width: 30ch;
}

.footer__heading {
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-5);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__list a {
  font-size: var(--text-small);
  color: var(--color-light-gray);
  transition: color var(--transition-fast);
}

.footer__list a:hover {
  color: var(--color-white);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-9);
  padding-top: var(--space-7);
  border-top: var(--border-width) solid rgba(255, 255, 255, 0.1);
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.footer__copyright {
  font-size: var(--text-caption);
  color: var(--color-cool-gray);
}

.footer__legal {
  display: flex;
  gap: var(--space-5);
}

.footer__legal a {
  font-size: var(--text-caption);
  color: var(--color-cool-gray);
}

.footer__legal a:hover {
  color: var(--color-white);
}


/* ==========================================================================
   9. Cards
   ========================================================================== */

.card {
  background-color: var(--color-white);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-5);
  color: var(--color-main-blue);
}

.card__icon img,
.card__icon svg {
  width: 100%;
  height: 100%;
}

.card__title {
  font-size: var(--text-h3);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.card__desc {
  font-size: var(--text-body);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-5);
}

.card__link {
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--color-main-blue);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.card__link:hover {
  color: var(--color-link-hover);
  gap: var(--space-3);
}


/* ==========================================================================
   10. Case Study Cards
   ========================================================================== */

.case-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-base);
}

.case-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.case-card__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.case-card__body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.case-card__logo {
  height: 24px;
  width: auto;
  margin-bottom: var(--space-4);
  opacity: 0.7;
}

.case-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.case-card__metric {
  font-family: var(--font-mono);
  font-size: var(--text-h2);
  font-weight: var(--weight-medium);
  color: var(--color-main-blue);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-2);
}

.case-card__summary {
  font-size: var(--text-body);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-5);
}

.case-card__link {
  margin-top: auto;
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--color-main-blue);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.case-card__link:hover {
  color: var(--color-link-hover);
  gap: var(--space-3);
}


/* ==========================================================================
   11. Metrics
   ========================================================================== */

.metric {
  text-align: center;
}

.metric__number {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: var(--weight-medium);
  color: var(--color-main-blue);
  line-height: var(--leading-tight);
}

.metric__label {
  font-size: var(--text-body);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
}

.metric__client {
  font-size: var(--text-small);
  color: var(--color-cool-gray);
  margin-top: var(--space-1);
}

/* Inverse for dark sections */
.section--dark .metric__number,
.section--navy .metric__number {
  color: var(--color-light-blue);
}

.section--dark .metric__label,
.section--navy .metric__label {
  color: var(--color-light-gray);
}


/* ==========================================================================
   12. Tags
   ========================================================================== */

.tag {
  display: inline-block;
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-main-blue);
  background-color: rgba(0, 102, 204, 0.08);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  line-height: var(--leading-normal);
}

.tag--active {
  background-color: var(--color-main-blue);
  color: var(--color-white);
}


/* ==========================================================================
   13. Section Header
   ========================================================================== */

.section-header {
  max-width: 640px;
  margin-bottom: var(--space-9);
}

.section-header--center {
  text-align: center;
  margin-inline: auto;
}

.section-header__eyebrow {
  display: block;
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-main-blue);
  margin-bottom: var(--space-3);
}

.section--dark .section-header__eyebrow,
.section--navy .section-header__eyebrow {
  color: var(--color-lime);
}

.section-header__title {
  margin-bottom: var(--space-4);
}

.section-header__desc {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.section--dark .section-header__desc,
.section--navy .section-header__desc {
  color: var(--color-light-gray);
}


/* ==========================================================================
   14. Logo Bar
   ========================================================================== */

.logo-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-block: var(--space-8);
  border-top: var(--border-width) solid var(--color-border);
  border-bottom: var(--border-width) solid var(--color-border);
}

.logo-bar__label {
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-cool-gray);
  margin-bottom: var(--space-6);
}

.logo-bar__logos {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-7);
}

.logo-bar__logos img {
  height: 32px;
  width: auto;
  opacity: 0.6;
  filter: grayscale(100%);
  transition:
    opacity var(--transition-base),
    filter var(--transition-base);
}

.logo-bar__logos img:hover {
  opacity: 1;
  filter: grayscale(0%);
}


/* ==========================================================================
   15. AI Strip
   ========================================================================== */

.ai-strip {
  text-align: center;
  background-color: var(--color-deep-navy);
  padding-block: var(--space-9);
}

.ai-strip__label {
  font-size: var(--text-body-lg);
  font-weight: var(--weight-medium);
  color: var(--color-white);
  margin-bottom: var(--space-6);
}

.ai-strip__icons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
  margin-bottom: var(--space-4);
}

.ai-strip__icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  overflow: hidden;
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

.ai-strip__icon:hover {
  transform: scale(1.1);
  box-shadow: 0 0 0 2px var(--color-white);
}

.ai-strip__icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ai-strip__sub {
  font-size: var(--text-small);
  color: var(--color-cool-gray);
}


/* ==========================================================================
   16. Solution Cards (Expandable)
   ========================================================================== */

.solution-card {
  background-color: var(--color-white);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

.solution-card:hover {
  box-shadow: var(--shadow-md);
}

.solution-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6);
  cursor: pointer;
  user-select: none;
}

.solution-card__header:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: -2px;
}

.solution-card__title {
  font-size: var(--text-h3);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}

.solution-card__toggle {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--color-cool-gray);
  transition: transform var(--transition-base);
}

.solution-card.open .solution-card__toggle {
  transform: rotate(180deg);
}

.solution-card__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.solution-card.open .solution-card__body {
  max-height: 800px;
}

.solution-card__content {
  padding: 0 var(--space-6) var(--space-6);
}

.solution-card__tagline {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
  line-height: var(--leading-relaxed);
}

.solution-card__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.solution-card__list li {
  position: relative;
  padding-left: var(--space-5);
  font-size: var(--text-body);
  color: var(--color-text-primary);
  line-height: var(--leading-relaxed);
}

.solution-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-main-blue);
}


/* ==========================================================================
   17. Services Grid
   ========================================================================== */

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gutter);
}

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

.service-card {
  background-color: var(--color-white);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-base);
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.service-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-5);
  color: var(--color-main-blue);
}

.service-card__icon img,
.service-card__icon svg {
  width: 100%;
  height: 100%;
}

.service-card__title {
  font-size: var(--text-h3);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.service-card__desc {
  font-size: var(--text-body);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-5);
}

.service-card__outcome {
  font-style: italic;
  font-size: var(--text-body);
  color: var(--color-text-primary);
  border-left: 3px solid var(--color-main-blue);
  padding-left: var(--space-4);
  margin-bottom: var(--space-5);
  line-height: var(--leading-relaxed);
}

.service-card__link {
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--color-main-blue);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.service-card__link:hover {
  color: var(--color-link-hover);
  gap: var(--space-3);
}


/* ==========================================================================
   18. Case Studies Grid & Filters
   ========================================================================== */

.case-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gutter);
}

@media (min-width: 768px) {
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.filter-btn {
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-secondary);
  background-color: transparent;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-main-blue);
  color: var(--color-main-blue);
}

.filter-btn--active {
  background-color: var(--color-main-blue);
  color: var(--color-white);
  border-color: var(--color-main-blue);
}

.load-more {
  display: flex;
  justify-content: center;
  margin-top: var(--space-8);
}


/* ==========================================================================
   19. Team Cards
   ========================================================================== */

.team-grid {
  display: flex;
  gap: var(--grid-gutter);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-4);
}

.team-grid::-webkit-scrollbar {
  height: 4px;
}

.team-grid::-webkit-scrollbar-track {
  background: var(--color-off-white);
  border-radius: var(--radius-full);
}

.team-grid::-webkit-scrollbar-thumb {
  background: var(--color-light-gray);
  border-radius: var(--radius-full);
}

@media (min-width: 768px) {
  .team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    overflow-x: visible;
    scroll-snap-type: none;
    padding-bottom: 0;
  }
}

@media (min-width: 1024px) {
  .team-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.team-card {
  text-align: center;
  min-width: 200px;
  scroll-snap-align: start;
  flex-shrink: 0;
}

.team-card__photo {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  margin-inline: auto;
  margin-bottom: var(--space-4);
}

.team-card__name {
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.team-card__role {
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.team-card__bio {
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 24ch;
  margin-inline: auto;
}


/* ==========================================================================
   20. Values Grid
   ========================================================================== */

.values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gutter);
}

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

.value-card {
  background-color: var(--color-off-white);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
}

.value-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-5);
  color: var(--color-main-blue);
}

.value-card__title {
  font-size: var(--text-h3);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.value-card__desc {
  font-size: var(--text-body);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}


/* ==========================================================================
   21. G2 Reviews
   ========================================================================== */

.g2-reviews {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gutter);
}

@media (min-width: 640px) {
  .g2-reviews {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

.g2-card {
  background-color: var(--color-white);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.g2-card__stars {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
  color: #F59E0B;
}

.g2-card__stars svg {
  width: 18px;
  height: 18px;
}

.g2-card__quote {
  font-style: italic;
  font-size: var(--text-body);
  color: var(--color-text-primary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-5);
}

.g2-card__author {
  font-size: var(--text-small);
  color: var(--color-text-secondary);
}

.g2-card__author strong {
  display: block;
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}


/* ==========================================================================
   22. Contact Form
   ========================================================================== */

.contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-9);
}

@media (min-width: 1024px) {
  .contact-layout {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-field label {
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}

.form-field label .required {
  color: #DC2626;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  font-size: var(--text-body);
  color: var(--color-text-primary);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--color-cool-gray);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-focus-ring);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
}

.form-field textarea {
  resize: vertical;
  min-height: 120px;
}

.form-field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%239EA3AA' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-8);
}

/* Error state */
.form-field--error input,
.form-field--error select,
.form-field--error textarea {
  border-color: #DC2626;
}

.form-field--error input:focus,
.form-field--error select:focus,
.form-field--error textarea:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

.form-field__error {
  font-size: var(--text-caption);
  color: #DC2626;
}

/* Checkbox group */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.checkbox-group label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  color: var(--color-text-primary);
  cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--color-main-blue);
}

/* Form row (inline fields) */
.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

/* Form success */
.form-success {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--space-4);
  padding: var(--space-9);
}

.form-success--visible {
  display: flex;
}

.form-success__icon {
  width: 64px;
  height: 64px;
  color: var(--color-main-blue);
}

.form-success__title {
  font-size: var(--text-h3);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}

.form-success__desc {
  font-size: var(--text-body);
  color: var(--color-text-secondary);
}

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


/* ==========================================================================
   23. 404 Error Page
   ========================================================================== */

.error-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--color-deep-navy);
  color: var(--color-text-inverse);
  text-align: center;
  padding: var(--space-6);
}

.error-page__code {
  font-family: var(--font-mono);
  font-size: clamp(4rem, 15vw, 10rem);
  font-weight: var(--weight-medium);
  color: var(--color-main-blue);
  line-height: 1;
  margin-bottom: var(--space-4);
}

.error-page__title {
  font-size: var(--text-h2);
  font-weight: var(--weight-medium);
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.error-page__desc {
  font-size: var(--text-body-lg);
  color: var(--color-light-gray);
  margin-bottom: var(--space-8);
  max-width: 45ch;
}

.error-page__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}


/* ==========================================================================
   24. Utility Classes
   ========================================================================== */

.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;
}

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

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

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

.mx-auto {
  margin-inline: auto;
}

.flex {
  display: flex;
}

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

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-4 {
  gap: var(--space-4);
}

.gap-6 {
  gap: var(--space-6);
}

.gap-8 {
  gap: var(--space-8);
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-6 {
  margin-top: var(--space-6);
}

.mt-8 {
  margin-top: var(--space-8);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-6 {
  margin-bottom: var(--space-6);
}

.mb-8 {
  margin-bottom: var(--space-8);
}


/* ==========================================================================
   25. Responsive Breakpoints
   ========================================================================== */

/* SM — 640px */
@media (min-width: 640px) {
  .sm\:text-center {
    text-align: center;
  }

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

/* MD — 768px */
@media (min-width: 768px) {
  .md\:flex {
    display: flex;
  }

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

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

  .md\:text-left {
    text-align: left;
  }

  .md\:items-start {
    align-items: flex-start;
  }
}

/* LG — 1024px */
@media (min-width: 1024px) {
  .lg\:flex {
    display: flex;
  }

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

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

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

  .lg\:grid-5 {
    grid-template-columns: repeat(5, 1fr);
  }

  .lg\:text-left {
    text-align: left;
  }
}

/* XL — 1280px */
@media (min-width: 1280px) {
  .xl\:grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }

  .xl\:grid-5 {
    grid-template-columns: repeat(5, 1fr);
  }
}


/* ==========================================================================
   26. Print Styles
   ========================================================================== */

@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a,
  a:visited {
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }

  .site-header,
  .site-footer,
  .nav__hamburger,
  .nav__mobile-menu,
  .skip-link {
    display: none !important;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  .section {
    padding-block: 1rem;
  }

  img {
    max-width: 100% !important;
    page-break-inside: avoid;
  }

  h2, h3 {
    page-break-after: avoid;
  }
}