:root {
  /* --- CORE COLOR PALETTE (LIGHT MODE) --- */
  --color-primary-rgb: 12, 84, 140;
  --color-secondary-rgb: 255, 145, 77;
  --color-white: #FFFFFF;
  --color-black: #1B1B1B;

  /* --- Glassmorphism / Aero Effect Variables --- */
  --blur-radius: 10px;
  --background-glass-light: rgba(255, 255, 255, 0.65);
  --border-glass-light: rgba(var(--color-primary-rgb), 0.15);
  --shadow-glow-primary: 0 0 20px -5px rgba(var(--color-primary-rgb), 0.3);

  /* Semantic Tokens */
  --color-primary: rgb(var(--color-primary-rgb));
  --color-secondary: rgb(var(--color-secondary-rgb));
  --color-background: var(--color-white);
  --color-surface: rgba(var(--color-primary-rgb), 0.05);
  --color-text: var(--color-black);
  --color-text-secondary: rgba(0, 0, 0, 0.65);
  --color-border: rgba(var(--color-primary-rgb), 0.2);
  --color-btn-primary-text: var(--color-white);
  --color-btn-secondary-text: var(--color-black);
  --color-focus-ring: rgba(var(--color-primary-rgb), 0.4);

  /* --- CORE DESIGN SYSTEM TOKENS --- */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;
  --space-4: 4px;
  --space-8: 8px;
  --space-12: 12px;
  --space-16: 16px;
  --space-24: 24px;
  --space-32: 32px;
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
}

/* --- SHADED COLOR PALETTE (DARK MODE) --- */
html[data-color-scheme="dark"] {
  --background-glass-dark: rgba(4, 44, 69, 0.6);
  --border-glass-dark: rgba(20, 136, 224, 0.25);
  --shadow-glow-primary: 0 0 20px -5px rgba(var(--color-secondary-rgb), 0.4);

  --color-background: #021C2D;
  --color-surface: #042C45;
  --color-text: #F5F5F5;
  --color-text-secondary: rgba(245, 245, 245, 0.7);
  --color-primary: rgb(var(--color-secondary-rgb));
  --color-secondary: #1488e0;
  --color-border: rgba(20, 136, 224, 0.3);
  --color-btn-primary-text: var(--color-black);
  --color-btn-secondary-text: var(--color-white);
  --color-focus-ring: rgba(var(--color-secondary-rgb), 0.4);
}

/* Base styles */
html {
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: -20vh;
  left: -20vw;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(var(--color-primary-rgb), 0.1) 0%, rgba(var(--color-primary-rgb), 0) 70%);
  z-index: -1;
  transform: translateZ(-1px);
}

body::after {
  content: '';
  position: fixed;
  bottom: -30vh;
  right: -30vw;
  width: 80vw;
  height: 80vw;
  background: radial-gradient(circle, rgba(var(--color-secondary-rgb), 0.1) 0%, rgba(var(--color-secondary-rgb), 0) 70%);
  z-index: -1;
  transform: translateZ(-1px);
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

/* ... (rest of the typography, buttons, forms, etc. are unchanged) ... */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

p {
  margin: 0 0 var(--space-16) 0;
  color: var(--color-text-secondary);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
  transition: all 0.3s ease;
}

a:hover {
  color: var(--color-primary);
  font-weight: bold;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: 1px solid transparent;
  text-decoration: none;
  position: relative;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  transform: scale(1.03) translateY(-2px);
  color: var(--color-btn-primary-text);
  box-shadow: var(--shadow-md), var(--shadow-glow-primary);
}

.btn--outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--outline:hover {
  background-color: var(--color-surface);
  color: var(--color-text);
  box-shadow: none;
}

.btn--sm {
  padding: var(--space-4) var(--space-12);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

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

.form-control {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: rgba(var(--color-primary-rgb), 0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: border-color var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard);
}

textarea.form-control {
  font-family: var(--font-family-base);
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: 0;
  box-shadow: var(--focus-ring);
}

.form-label {
  display: block;
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  color: var(--color-text)
}

.form-group {
  margin-bottom: var(--space-16);
}

.container {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: var(--space-16);
  padding-left: var(--space-16);
}

@media (min-width: 640px) {
  .container {
    max-width: var(--container-sm);
  }
}

@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: var(--container-lg);
  }
}

@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
  }
}

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

@font-face {
  font-family: 'FKGroteskNeue';
  src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2') format('woff2');
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--background-glass-light);
  border-bottom: 1px solid var(--border-glass-light);
  z-index: 1000;
  transition: all var(--duration-normal) var(--ease-standard);
  -webkit-backdrop-filter: blur(var(--blur-radius));
  backdrop-filter: blur(var(--blur-radius));
}

html[data-color-scheme="dark"] .header {
  background: var(--background-glass-dark);
  border-bottom: 1px solid var(--border-glass-dark);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-16) 0;
  height: 70px;
}

.nav__brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
}

.nav__logo {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  letter-spacing: var(--letter-spacing-tight);
}

.nav__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

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

.nav__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-24);
}

.nav__item {
  margin: 0;
}

.nav__link {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  transition: color var(--duration-fast) var(--ease-standard);
  text-decoration: none;
  padding: var(--space-8);
}

.nav__link.active {
  color: var(--color-primary);
}

/* --- NEW: Wrapper for theme toggle and menu toggle --- */
.nav__controls {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

/* --- MODIFIED: More fluid hamburger icon animation --- */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 30px;
  height: 30px;
  cursor: pointer;
  gap: 5px;
  /* Use gap for spacing */
}

.nav__toggle span {
  width: 25px;
  height: 2px;
  /* Thinner for a sleeker look */
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--duration-normal) var(--ease-standard),
    opacity var(--duration-normal) var(--ease-standard);
}

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

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

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

#theme-toggle {
  font-size: 20px;
  background: none;
  border: none;
  padding: 4px;
  border-radius: var(--radius-sm);
  line-height: 1;
  cursor: pointer;
  color: var(--color-text);
}

/* ... (rest of the file is mostly unchanged, but I've included the full version for completeness) ... */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: transparent;
  padding-top: 70px;
}

.hero__content {
  max-width: 800px;
  text-align: center;
  margin: 0 auto;
}

.hero__title-accent {
  color: var(--color-primary);
}

.hero__actions {
  display: flex;
  gap: var(--space-16);
  justify-content: center;
  flex-wrap: wrap;
}

.section {
  padding: var(--space-32) 0;
}

.section--alt {
  background: transparent;
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-32);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.about__card,
.service__card,
.gridco__card,
.advantage__card {
  background: var(--background-glass-light);
  border: 1px solid var(--border-glass-light);
  -webkit-backdrop-filter: blur(var(--blur-radius));
  backdrop-filter: blur(var(--blur-radius));
  padding: var(--space-24);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-standard);
}

html[data-color-scheme="dark"] .about__card,
html[data-color-scheme="dark"] .service__card,
html[data-color-scheme="dark"] .gridco__card,
html[data-color-scheme="dark"] .advantage__card {
  background: var(--background-glass-dark);
  border: 1px solid var(--border-glass-dark);
}

.about__card:hover,
.service__card:hover,
.gridco__card:hover,
.advantage__card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), var(--shadow-glow-primary);
  border-color: var(--color-primary);
}

.about__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-24);
}

.about__card h3 {
  color: var(--color-primary);
}

.about__card p {
  margin: 0;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-24);
}

.service__card {
  text-align: center;
}

.service__icon {
  font-size: 48px;
  margin-bottom: var(--space-16);
  display: block;
  color: var(--color-secondary);
}

.service__description {
  margin: 0;
}

.gridco__container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--space-32);
}

.gridco__card {
  padding: var(--space-32);
}

.gridco__title {
  color: var(--color-primary);
}

.gridco__url {
  font-family: var(--font-family-mono);
  margin-bottom: var(--space-16);
}

.tech__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  justify-content: center;
}

.tech__tag {
  background: var(--color-secondary);
  color: var(--color-btn-secondary-text);
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.advantages__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-24);
}

.advantage__card {
  text-align: center;
}

.advantage__icon {
  font-size: 48px;
  margin-bottom: var(--space-16);
  display: block;
  color: var(--color-secondary);
}

.advantage__description {
  margin: 0;
}

.contact__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-32);
  align-items: start;
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

.contact__item strong {
  color: var(--color-text);
}

.contact__form {
  background: var(--background-glass-light);
  border: 1px solid var(--border-glass-light);
  -webkit-backdrop-filter: blur(var(--blur-radius));
  backdrop-filter: blur(var(--blur-radius));
  padding: var(--space-32);
  border-radius: var(--radius-lg);
}

html[data-color-scheme="dark"] .contact__form {
  background: var(--background-glass-dark);
  border: 1px solid var(--border-glass-dark);
}

.footer {
  background: rgba(var(--color-primary-rgb), 0.03);
  border-top: 1px solid var(--color-border);
  padding: var(--space-32) 0 var(--space-16);
}

html[data-color-scheme="dark"] .footer {
  background: var(--color-surface);
}

.footer__content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-32);
  margin-bottom: var(--space-24);
}

.footer__logo {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-8);
  display: block;
}

.footer__links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-24);
}

.footer__group h4 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-12);
}

.footer__group a {
  display: block;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.footer__bottom {
  text-align: center;
  padding-top: var(--space-16);
  border-top: 1px solid var(--color-border);
}

.footer__bottom p {
  font-size: var(--font-size-sm);
  margin: 0;
}

/* Mobile Styles */
@media (max-width: 768px) {
  .nav__menu {
    position: fixed;
    top: 70px;
    /* Height of the header */
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(255, 255, 255, 0.85);
    -webkit-backdrop-filter: blur(32px);
    backdrop-filter: blur(32px);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: var(--space-32);
    transition: left var(--duration-normal) var(--ease-standard);
    border-top: 1px solid var(--color-border);
  }

  html[data-color-scheme="dark"] .nav__menu {
    background: rgba(4, 44, 69, 0.8);
  }

  .nav__menu.show {
    left: 0;
  }

  .nav__list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-16);
  }

  .nav__item {
    margin-bottom: var(--space-16);
  }

  .nav__toggle {
    display: flex;
  }

  /* --- REMOVED: No longer need to position theme toggle inside the menu --- */
  /* .nav__menu>#theme-toggle { ... } */

  .hero__title {
    font-size: var(--font-size-3xl);
  }

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

  .hero__actions .btn {
    width: 100%;
    max-width: 280px;
  }

  .section__header h2 {
    font-size: var(--font-size-2xl);
  }

  .about__card,
  .service__card,
  .gridco__card,
  .advantage__card,
  .contact__form {
    padding: var(--space-16);
  }

  .services__grid,
  .gridco__container,
  .contact__container,
  .footer__content,
  .footer__links {
    grid-template-columns: 1fr;
  }

  .contact__container {
    gap: var(--space-24);
  }

  .footer__content {
    text-align: center;
  }
}

/* ==================== HEADER & NAV ==================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--background-glass-light);
  border-bottom: 1px solid var(--border-glass-light);
  z-index: 1000;
  transition: all var(--duration-normal) var(--ease-standard);
  -webkit-backdrop-filter: blur(var(--blur-radius));
  backdrop-filter: blur(var(--blur-radius));
}

html[data-color-scheme="dark"] .header {
  background: var(--background-glass-dark);
  border-bottom: 1px solid var(--border-glass-dark);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__logo-img {
  height: 45px;
  /* Unified height for logos */
  width: auto;
}

.footer__logo-img {
  height: 100px;
  /* Unified height for logos */
  width: auto;
}

.nav__menu {
  /* This will be handled by the mobile styles */
}

.nav__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-24);
}

.nav__item {
  margin: 0;
}

.nav__link {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  transition: color var(--duration-fast) var(--ease-standard);
  text-decoration: none;
  padding: var(--space-8);
}

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

/* --- NEW: Styles for the actions wrapper --- */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  /* Space between theme button and hamburger */
}

/* --- MODIFIED: Styling the theme toggle via CSS is cleaner --- */
#theme-toggle {
  padding: 6px;
  font-size: 20px;
  line-height: 1;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  /* Ensure it starts transparent */
}

/* Hamburger Menu Toggle */
.nav__toggle {
  display: none;
  /* Hidden by default on desktop */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 30px;
  height: 30px;
  cursor: pointer;
  gap: 5px;
}

.nav__toggle span {
  width: 25px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--duration-normal) var(--ease-standard),
    opacity var(--duration-normal) var(--ease-standard);
}

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

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

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


/* ==================== MOBILE STYLES ==================== */
/* ==================== MOBILE STYLES ==================== */
@media (max-width: 1024px) {
  .nav__menu {
    position: fixed;
    top: 70px;
    reght: -100%;
    width: 100%;
    height: calc(100vh - 70px);

    /* No blur at all on mobile */
    background-color: rgba(255, 255, 255, 0.98);

    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: var(--space-32);
    transition: right var(--duration-normal) var(--ease-standard);
    border-top: 1px solid var(--color-border);
  }

  html[data-color-scheme="dark"] .nav__menu {
    background-color: rgba(4, 44, 69, 0.98);
  }

  .nav__menu.show {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-16);
  }

  .nav__item {
    margin-bottom: var(--space-16);
  }

  .nav__toggle {
    display: flex;
  }
}