/**
 * Hoptus Website Styles
 * Technology Consultancy & App Development
 * 
 * Table of Contents:
 * 1. CSS Variables (Design Tokens)
 * 2. Base Styles
 * 3. Typography
 * 4. Buttons
 * 5. Form Elements
 * 6. Card Components
 * 7. Layout & Utilities
 * 8. Navigation
 * 9. Hero Section
 * 10. Services Section
 * 11. About Section
 * 12. Clients Section
 * 13. Contact Section
 * 14. Footer
 * 15. Responsive Design
 */

/* ============================================
   1. CSS Variables (Design Tokens)
   ============================================ */
:root {
  /* Primitive Color Tokens */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  --color-cream-50: rgba(248, 252, 248, 1);
  --color-cream-100: rgba(252, 255, 252, 1);
  --color-gray-200: rgba(245, 245, 245, 1);
  --color-gray-300: rgba(167, 169, 169, 1);
  --color-gray-400: rgba(119, 124, 124, 1);
  --color-slate-500: rgba(98, 108, 113, 1);
  --color-brown-600: rgba(94, 82, 64, 1);
  --color-charcoal-700: rgba(31, 33, 33, 1);
  --color-charcoal-800: rgba(38, 40, 40, 1);
  --color-slate-900: rgba(19, 52, 59, 1);
  --color-teal-300: rgba(50, 184, 198, 1);
  --color-teal-400: rgba(45, 166, 178, 1);
  --color-teal-500: rgba(33, 128, 141, 1);
  --color-teal-600: rgba(29, 116, 128, 1);
  --color-teal-700: rgba(26, 104, 115, 1);
  --color-teal-800: rgba(41, 150, 161, 1);
  --color-red-400: rgba(255, 84, 89, 1);
  --color-red-500: rgba(192, 21, 47, 1);
  --color-orange-400: rgba(230, 129, 97, 1);
  --color-orange-500: rgba(168, 75, 47, 1);

  /* RGB versions for opacity control */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  --color-slate-500-rgb: 98, 108, 113;
  --color-red-500-rgb: 192, 21, 47;
  --color-red-400-rgb: 255, 84, 89;
  --color-orange-500-rgb: 168, 75, 47;
  --color-orange-400-rgb: 230, 129, 97;

  /* Background color tokens */
  --color-bg-1: rgba(59, 130, 246, 0.08); /* Light blue */
  --color-bg-2: rgba(245, 158, 11, 0.08); /* Light yellow */
  --color-bg-3: rgba(34, 197, 94, 0.08); /* Light green */
  --color-bg-4: rgba(239, 68, 68, 0.08); /* Light red */
  --color-bg-5: rgba(147, 51, 234, 0.08); /* Light purple */
  --color-bg-6: rgba(249, 115, 22, 0.08); /* Light orange */
  --color-bg-7: rgba(236, 72, 153, 0.08); /* Light pink */
  --color-bg-8: rgba(6, 182, 212, 0.08); /* Light cyan */

  /* Semantic Color Tokens */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-black);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);
  --color-select-caret: rgba(var(--color-slate-900-rgb), 0.8);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for opacity control */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --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-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --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;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --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);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* ============================================
   2. Base Styles
   ============================================ */
html {
  font-size: var(--font-size-base);
  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;
}

body {
  margin: 0;
  padding: 0;
}

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

/* ============================================
   3. Typography
   ============================================ */
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);
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-md);
}

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

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

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

code,
pre {
  font-family: var(--font-family-mono);
  font-size: calc(var(--font-size-base) * 0.95);
  background-color: var(--color-secondary);
  border-radius: var(--radius-sm);
}

code {
  padding: var(--space-1) var(--space-4);
}

pre {
  padding: var(--space-16);
  margin: var(--space-16) 0;
  overflow: auto;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
}

/* ============================================
   4. Buttons
   ============================================ */
.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: none;
  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);
}

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

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

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

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

.btn--secondary:active {
  background: var(--color-secondary-active);
}

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

.btn--outline:hover {
  background: var(--color-secondary);
}

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

.btn--lg {
  padding: var(--space-10) var(--space-20);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
}

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================
   5. Form Elements
   ============================================ */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  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);
  font-size: var(--font-size-base);
}

select.form-control {
  padding: var(--space-8) var(--space-12);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: var(--select-caret-light);
  background-repeat: no-repeat;
  background-position: right var(--space-12) center;
  background-size: 16px;
  padding-right: var(--space-32);
}

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

.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-secondary);
}

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

/* ============================================
   6. Card Components
   ============================================ */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--duration-normal) var(--ease-standard);
}

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

.card__body {
  padding: var(--space-16);
}

.card__header,
.card__footer {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-card-border-inner);
}

/* Status indicators - simplified with CSS variables */
.status {
  display: inline-flex;
  align-items: center;
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.status--success {
  background-color: rgba(
    var(--color-success-rgb, 33, 128, 141),
    var(--status-bg-opacity)
  );
  color: var(--color-success);
  border: 1px solid
    rgba(var(--color-success-rgb, 33, 128, 141), var(--status-border-opacity));
}

.status--error {
  background-color: rgba(
    var(--color-error-rgb, 192, 21, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-error);
  border: 1px solid
    rgba(var(--color-error-rgb, 192, 21, 47), var(--status-border-opacity));
}

.status--warning {
  background-color: rgba(
    var(--color-warning-rgb, 168, 75, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-warning);
  border: 1px solid
    rgba(var(--color-warning-rgb, 168, 75, 47), var(--status-border-opacity));
}

.status--info {
  background-color: rgba(
    var(--color-info-rgb, 98, 108, 113),
    var(--status-bg-opacity)
  );
  color: var(--color-info);
  border: 1px solid
    rgba(var(--color-info-rgb, 98, 108, 113), var(--status-border-opacity));
}

/* ============================================
   7. Layout & Utilities
   ============================================ */
.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);
  }
}

/* Utility classes */
.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-8 {
  gap: var(--space-8);
}
.gap-16 {
  gap: var(--space-16);
}

.m-0 {
  margin: 0;
}
.mt-8 {
  margin-top: var(--space-8);
}
.mb-8 {
  margin-bottom: var(--space-8);
}
.mx-8 {
  margin-left: var(--space-8);
  margin-right: var(--space-8);
}
.my-8 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.p-0 {
  padding: 0;
}
.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}
.px-8 {
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}
.py-16 {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}
.px-16 {
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

.block {
  display: block;
}
.hidden {
  display: none;
}

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

/* Focus styles */
: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');
}

/* END PERPLEXITY DESIGN SYSTEM */

/* ============================================
   HOPTUS CUSTOM STYLES
   ============================================ */

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}
/* Body and layout */
body {
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

/* ============================================
   8. Navigation
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(33, 128, 141, 0.15);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  z-index: 1000;
  transition: all var(--duration-normal) var(--ease-standard);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid rgba(33, 128, 141, 0.2);
}

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

.nav__brand {
  margin: 0;
}

.nav__logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  text-decoration: none;
  transition: opacity var(--duration-fast) var(--ease-standard);
}

.nav__logo-link:hover {
  opacity: 0.8;
}

.nav__logo-img {
  height: 48px;
  width: auto;
  display: block;
}

.nav__logo-text {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--color-teal-500), var(--color-teal-700));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
  letter-spacing: var(--letter-spacing-tight);
}

.nav__menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-32);
}

.nav__item {
  margin: 0;
}

.nav__link {
  color: var(--color-slate-900);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-lg);
  transition: color var(--duration-fast) var(--ease-standard);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--duration-normal) var(--ease-standard);
}

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

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

/* Language Switcher Button */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  text-decoration: none;
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
}

.lang-switcher:hover {
  background: var(--color-primary-hover);
}

.lang-switcher:active {
  background: var(--color-primary-active);
}

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

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-8);
  gap: var(--space-4);
}

.nav__toggle-bar {
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--duration-normal) var(--ease-standard);
}

/* ============================================
   9. Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, 
    rgba(16, 185, 129, 0.25) 0%, 
    rgba(5, 150, 105, 0.20) 20%,
    rgba(16, 185, 129, 0.28) 40%,
    rgba(6, 182, 212, 0.22) 60%,
    rgba(16, 185, 129, 0.26) 80%,
    rgba(5, 150, 105, 0.20) 100%);
  position: relative;
  padding-top: 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.15) 0%, transparent 60%),
              radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.12) 0%, transparent 60%);
  pointer-events: none;
}
.hero__container {
  width: 100%;
}

.hero__content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero__logo {
  width: 600px;
  height: auto;
  margin: 0 auto var(--space-32);
  display: block;
  opacity: 0.95;
  filter: drop-shadow(0 4px 12px rgba(33, 128, 141, 0.2));
  transition: transform var(--duration-normal) var(--ease-standard);
}

.hero__logo:hover {
  transform: scale(1.15);
}

.hero__title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-24);
  color: var(--color-primary);
  line-height: var(--line-height-tight);
}

.hero__subtitle {
  font-size: var(--font-size-2xl);
  color: var(--color-slate-500);
  margin-bottom: var(--space-32);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__cta {
  margin-top: var(--space-16);
  margin-bottom: var(--space-32);
}

/* Sections */
.section__title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-16);
  color: var(--color-primary);
  text-align: center;
}

.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-slate-500);
  max-width: 600px;
  margin: 0 auto var(--space-32);
  text-align: center;
}

/* ============================================
   10. Services Section
   ============================================ */
.services {
  padding: var(--space-32) 0;
  background-color: var(--color-background);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-32);
  margin-top: var(--space-32);
}

.service-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(250, 255, 250, 0.9));
  backdrop-filter: blur(10px);
  padding: var(--space-32);
  border-radius: 16px;
  border: 1px solid rgba(33, 128, 141, 0.2);
  text-align: center;
  transition: all var(--duration-normal) var(--ease-standard);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-teal-500), var(--color-teal-700));
  transform: scaleX(0);
  transition: transform var(--duration-normal) var(--ease-standard);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(33, 128, 141, 0.15);
  border-color: rgba(33, 128, 141, 0.3);
}

.service-card:hover::before {
  transform: scaleX(1);
}

/* Service card icons (SVG) */
.service-card__icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-24);
  display: block;
  transition: transform var(--duration-normal) var(--ease-standard);
  filter: drop-shadow(0 4px 12px rgba(33, 128, 141, 0.2));
}

.service-card:hover .service-card__icon {
  transform: scale(1.15) rotate(5deg);
}

.service-card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-16);
  color: var(--color-slate-900);
}

.service-card__description {
  color: var(--color-slate-500);
  line-height: var(--line-height-normal);
}

/* ============================================
   11. About Section
   ============================================ */
.about {
  padding: var(--space-32) 0;
  background: linear-gradient(135deg, 
    rgba(5, 150, 105, 0.22) 0%, 
    rgba(16, 185, 129, 0.18) 25%,
    rgba(6, 182, 212, 0.20) 50%,
    rgba(16, 185, 129, 0.18) 75%,
    rgba(5, 150, 105, 0.22) 100%);
  position: relative;
}

.about::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 70% 30%, rgba(16, 185, 129, 0.12) 0%, transparent 60%);
  pointer-events: none;
}

.about__description {
  font-size: var(--font-size-lg);
  color: var( --color-slate-500);
  margin: 0 auto var(--space-32);
  max-width: 800px;
  text-align: center;
}

.about__features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-32);
  margin-top: var(--space-32);
}

.feature {
  text-align: left;
  padding: var(--space-24);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(250, 255, 250, 0.9));
  backdrop-filter: blur(10px);
  border-radius: 12px;
  border: 1px solid rgba(33, 128, 141, 0.2);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  transition: all var(--duration-normal) var(--ease-standard);
}

.feature:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(33, 128, 141, 0.12);
  border-color: rgba(33, 128, 141, 0.25);
}

.feature__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-12);
  color: var(--color-slate-900);
}

.feature__description {
  color: var(--color-slate-500);
  margin: 0;
}

/* ============================================
   12. Clients Section
   ============================================ */
.clients {
  padding: var(--space-32) 0;
  background-color: var(--color-background);
  position: relative;
}

.clients__description {
  font-size: var(--font-size-lg);
  color: var(--color-slate-500);
  margin: 0 auto var(--space-32);
  max-width: 800px;
  text-align: center;
}

.clients__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-32);
  margin-top: var(--space-32);
}

.client-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-32);
  min-height: 180px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(250, 255, 250, 0.9));
  backdrop-filter: blur(10px);
  border-radius: 12px;
  border: 1px solid rgba(33, 128, 141, 0.2);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  transition: all var(--duration-normal) var(--ease-standard);
}

.client-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(33, 128, 141, 0.12);
  border-color: rgba(33, 128, 141, 0.25);
}

.client-card__logo {
  width: auto;
  max-width: 100%;
  height: 80px;
  object-fit: contain;
  display: block;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: all var(--duration-normal) var(--ease-standard);
}

.client-card:hover .client-card__logo {
  filter: grayscale(0%);
  opacity: 1;
}

.client-card__name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-8);
  color: var(--color-slate-900);
}

.client-card__project {
  font-size: var(--font-size-sm);
  color: var(--color-slate-500);
  margin: 0;
}

/* ============================================
   13. Contact Section
   ============================================ */
.contact {
  padding: var(--space-32) 0;
  background-color: var(--color-background);
}

.contact-form {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(250, 255, 250, 0.9));
  backdrop-filter: blur(10px);
  padding: var(--space-32);
  border-radius: 16px;
  border: 1px solid rgba(33, 128, 141, 0.2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  max-width: 600px;
  margin: var(--space-32) auto 0;
}

.form-group-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-20);
  margin-bottom: var(--space-24);
}

.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 0;
}

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

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-12) var(--space-16);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  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);
  font-family: var(--font-family-base);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  outline: var(--focus-outline);
  box-shadow: var(--focus-ring);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-gray-400);
  opacity: 0.7;
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
  font-size: var(--font-size-base);
}

.form-submit {
  width: 100%;
  padding: var(--space-12) var(--space-24);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-btn-primary-text);
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius-base);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  box-shadow: 0 2px 8px rgba(33, 128, 141, 0.2);
}

.form-submit:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 4px 12px rgba(33, 128, 141, 0.3);
  transform: translateY(-2px);
}

.form-submit:active {
  background: var(--color-primary-active);
  transform: translateY(0);
}

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

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Thank you message styling */
.thank-you-message {
  text-align: center;
  padding: var(--space-32);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(250, 255, 250, 0.9));
  backdrop-filter: blur(10px);
  border-radius: 16px;
  border: 1px solid rgba(33, 128, 141, 0.2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  max-width: 600px;
  margin: var(--space-32) auto 0;
}

.thank-you-message h3 {
  color: var(--color-primary);
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-16);
}

.thank-you-message p {
  color: var(--color-slate-500);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-24);
}

.thank-you-message .btn {
  margin-top: var(--space-16);
}

.form-error {
  display: block;
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-4);
  min-height: 20px;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-24);
}

.contact__item {
  padding: var(--space-20);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
}

.contact__item-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-8);
  color: var(--color-text);
}

.contact__item-value {
  color: var(--color-text-secondary);
  margin: 0;
}

/* ============================================
   14. Footer
   ============================================ */
.footer {
  background-color: var(--color-charcoal-800);
  color: var(--color-cream-50);
  padding: var(--space-24) 0;
  text-align: center;
}

.footer__text {
  color: var(--color-gray-300);
  margin: 0;
  font-size: var(--font-size-sm);
}

/* ============================================
   15. Responsive Design
   ============================================ */

/* Tablet and Mobile (≤768px) */
@media (max-width: 768px) {
  .nav__menu {
    position: fixed;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-surface);
    flex-direction: column;
    padding: var(--space-24);
    gap: var(--space-16);
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--color-border);
    transform: translateY(-100vh);
    transition: transform var(--duration-normal) var(--ease-standard);
  }

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

  .nav__toggle {
    display: flex;
  }

  .nav__toggle.active .nav__toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

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

  .nav__toggle.active .nav__toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

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

  .lang-switcher {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-xs);
    white-space: nowrap;
  }

  .hero {
    padding-top: 120px;
  }

  .hero__logo {
    width: 80%;
    max-width: 400px;
  }

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

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

  .services__grid {
    grid-template-columns: 1fr;
    gap: var(--space-24);
  }

  .about__features {
    grid-template-columns: 1fr;
    gap: var(--space-24);
  }

  .clients__grid {
    grid-template-columns: 1fr;
    gap: var(--space-24);
  }

  .contact__content {
    grid-template-columns: 1fr;
    gap: var(--space-24);
  }

  .contact__form-container {
    padding: var(--space-24);
  }

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

/* Small Mobile (≤480px) */
@media (max-width: 480px) {
  .hero__logo {
    width: 90%;
    max-width: 280px;
  }

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

  .service-card,
  .feature,
  .client-card,
  .contact__item {
    padding: var(--space-20);
  }

  .nav {
    padding: var(--space-12) 0;
  }
}

/* Animation classes */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--duration-normal) var(--ease-standard);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Form validation states */
.form-control.error {
  border-color: var(--color-error);
}

.form-control.success {
  border-color: var(--color-success);
}

/* Print Styles */
@media print {
  .header,
  .nav__toggle,
  .hero__cta,
  .contact__form,
  .footer {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .hero,
  .services,
  .about,
  .contact {
    page-break-inside: avoid;
    background: white !important;
  }
  
  .service-card,
  .feature {
    border: 1px solid #ddd;
    page-break-inside: avoid;
  }
}