/* ========================================
   JSW AI Solutions — Stylesheet
   ======================================== */

/* --- Custom Properties --- */
:root {
  --color-primary: #1B3A5C;
  --color-dark: #0D1F33;
  --color-accent: #4A9FD9;
  --color-accent-hover: #3A8BC4;
  --color-bg-light: #F5F7FA;
  --color-bg-blue: #E8F4FB;
  --color-text: #3D4852;
  --color-text-light: #FFFFFF;
  --color-text-muted: #6B7B8D;
  --color-border: #D1D9E0;
  --color-error: #DC3545;
  --color-success: #28A745;

  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;

  --nav-height: 80px;
  --container-max: 1120px;
  --container-padding: 1.25rem;
  --section-padding: 5rem 0;

  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);

  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: #FFFFFF;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
  list-style: none;
}

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

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--color-accent);
  color: var(--color-text-light);
  border-radius: var(--radius);
  z-index: 1000;
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
  color: var(--color-text-light);
}

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  color: var(--color-primary);
}

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

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all var(--transition);
  min-height: 44px;
  min-width: 44px;
  text-align: center;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-text-light);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-text-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-text-light);
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-light);
  border-color: #FFFFFF;
}

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

/* ========================================
   Navigation
   ======================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background-color var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  background-color: var(--color-dark);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav__logo {
  display: flex;
  align-items: baseline;
  gap: 0;
  font-family: var(--font-heading);
  line-height: 1;
}

.nav__logo:hover {
  color: var(--color-text-light);
}

.nav__logo-jsw {
  font-size: 2.5rem;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: -0.04em;
}

.nav__logo-ai {
  font-size: 2.5rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: -0.02em;
  margin-left: 0.15em;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav__link {
  display: block;
  padding: 0.5rem 1rem;
  color: rgba(255, 255, 255, 0.8);
  font-family: var(--font-heading);
  font-size: 1.1875rem;
  font-weight: 500;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.nav__link:hover,
.nav__link.is-active {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.1);
}

.nav__link--cta {
  background: var(--color-accent);
  color: var(--color-text-light) !important;
  margin-left: 0.5rem;
}

.nav__link--cta:hover {
  background: var(--color-accent-hover);
}

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
}

.nav__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: #FFFFFF;
  border-radius: 2px;
  transition: all var(--transition);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Hero
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary) 100%);
  padding: calc(var(--nav-height) + 8rem) 0 6rem;
  position: relative;
  overflow: hidden;
}

/* Floating network canvas behind hero text */
.hero__network {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.5;
}

.hero__inner {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero__title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero__subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 1.25rem;
  max-width: 600px;
  line-height: 1.7;
}

.hero__proof {
  font-size: 0.9375rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 2.5rem;
  letter-spacing: 0.01em;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ========================================
   Stats Banner
   ======================================== */
.stats-banner {
  background: #FFFFFF;
  padding: 3rem 0;
  border-bottom: 1px solid var(--color-border);
}

.stats-banner .stats {
  margin-bottom: 0;
  grid-template-columns: repeat(4, 1fr);
}

.stats-banner .stat__number,
.stats-banner .stat__symbol {
  font-size: clamp(2rem, 4vw, 2.75rem);
  color: var(--color-primary);
}

.stats-banner .stat__label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ========================================
   Accent Banner
   ======================================== */
.accent-banner {
  background: linear-gradient(135deg, #1B3A5C 0%, #2A4F73 100%);
  padding: 3rem 0;
  text-align: center;
}

.accent-banner__text {
  font-family: var(--font-heading);
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  font-weight: 600;
  color: #D4A853;
  font-style: italic;
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ========================================
   Sections (shared)
   ======================================== */
.section {
  padding: var(--section-padding);
}

.section--white {
  background: #FFFFFF;
}

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

.section--blue {
  background: var(--color-bg-blue);
}

.section--dark {
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary) 100%);
  position: relative;
  overflow: hidden;
}

.section--dark::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.section--dark::after {
  content: '';
  position: absolute;
  top: -30%;
  left: -10%;
  width: 60%;
  height: 160%;
  background: radial-gradient(ellipse, rgba(74, 159, 217, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.section--dark > .container {
  position: relative;
  z-index: 1;
}

.section--dark .section__title,
.section--dark h3,
.section--dark p {
  color: var(--color-text-light);
}

.section--dark .section__subtitle {
  color: rgba(255, 255, 255, 0.75);
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
}

.section__subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto 3rem;
}

/* ========================================
   About
   ======================================== */
.about__grid {
  display: grid;
  gap: 3rem;
}

.about__text p {
  margin-bottom: 1rem;
  font-size: 1.0625rem;
  line-height: 1.75;
}


.about__highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.highlight-card {
  padding: 1.5rem;
  background: var(--color-bg-light);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.highlight-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--color-bg-blue);
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.highlight-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.highlight-card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ========================================
   Capabilities
   ======================================== */
.capabilities__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.capability-card {
  padding: 2rem;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.capability-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.capability-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  background: var(--color-bg-blue);
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.capability-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.capability-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ========================================
   How It Works (Tiers)
   ======================================== */
.tiers {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tier {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  width: 100%;
}

.tier__number {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-text-light);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
}

.tier__content {
  flex: 1;
  padding-bottom: 0.5rem;
}

.tier__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.tier__label {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.tier__desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.tier__list {
  padding-left: 1.25rem;
}

.tier__list li {
  position: relative;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  padding-left: 0.25rem;
  margin-bottom: 0.35rem;
  list-style: disc;
}

.tier__connector {
  padding: 0.5rem 0;
  display: flex;
  justify-content: center;
  padding-left: 12px;
}

/* ========================================
   Why Us
   ======================================== */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 2rem;
  text-align: center;
  margin-bottom: 3.5rem;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat__number {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.stat__symbol {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.stat__label {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text-light);
  margin-top: 0.5rem;
}

.stat__note {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 0.25rem;
}

.differentiators {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.diff-card {
  padding: 1.75rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  transition: background var(--transition);
}

.diff-card:hover {
  background: rgba(255, 255, 255, 0.1);
}

.diff-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.diff-card p {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

/* ========================================
   Contact
   ======================================== */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
  align-items: start;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-top: 0.5rem;
}

.contact__heading {
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.3;
}

.contact__pitch {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.contact__detail {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  font-size: 1rem;
}

.contact__detail svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

.contact__detail a {
  color: var(--color-accent);
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form__label {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
}

.form__label span {
  color: var(--color-error);
}

.form__input {
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: #FFFFFF;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
  min-height: 44px;
}

.form__input::placeholder {
  color: var(--color-text-muted);
}

.form__input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(74, 159, 217, 0.15);
}

.form__input.is-invalid {
  border-color: var(--color-error);
}

.form__input.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.15);
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

.form__error {
  font-size: 0.8125rem;
  color: var(--color-error);
  min-height: 1.2em;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--color-dark);
  padding: 2.5rem 0;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer__logo-mark {
  display: inline-flex;
  align-items: baseline;
  white-space: nowrap;
}

.footer__logo-jsw {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: -0.04em;
}

.footer__logo-ai {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: -0.02em;
  margin-left: 0.2em;
}

.footer__name {
  display: block;
  color: var(--color-text-light);
  font-family: var(--font-heading);
  font-size: 1rem;
}

.footer__tagline {
  display: block;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer__contact a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9375rem;
}

.footer__contact a:hover {
  color: var(--color-accent);
}

.footer__copy {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
}

/* ========================================
   Scroll Animations
   ======================================== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========================================
   Responsive
   ======================================== */

/* Tablet & below */
@media (max-width: 768px) {
  :root {
    --section-padding: 3.5rem 0;
    --nav-height: 64px;
  }

  /* Mobile nav */
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-dark);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
    z-index: 99;
  }

  .nav__menu.is-open {
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    font-size: 1.25rem;
    padding: 0.75rem 1.5rem;
  }

  .nav__link--cta {
    margin-left: 0;
    margin-top: 0.5rem;
  }

  /* Contact grid stacks */
  .contact__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  /* Stats banner — 2x2 grid on mobile */
  .stats-banner .stats {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  /* Footer stacks */
  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .footer__brand {
    flex-direction: column;
  }



  /* Hero */
  .hero {
    min-height: auto;
    padding: calc(var(--nav-height) + 4rem) 0 3rem;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }

  /* Differentiators — single column with more padding */
  .differentiators {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .diff-card {
    padding: 1.5rem;
  }

  /* Tiers */
  .tier {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .tier__list {
    text-align: left;
    display: inline-block;
  }

  /* Nav logo smaller on mobile */
  .nav__logo-jsw,
  .nav__logo-ai {
    font-size: 2rem;
  }
}

/* Large screens */
@media (min-width: 769px) {
  .about__grid {
    grid-template-columns: 1.2fr 1fr;
    align-items: start;
  }

  body {
    font-size: 1.125rem;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
}