/* ============================================
   Syntax Ore — style.css
   Sections: Variables, Reset, Layout, Typography,
             Header, Footer, Components, Utilities, Responsive
   ============================================ */

/* --- Variables --- */
:root {
  /* Colors */
  --color-primary: #0A1628;
  --color-accent: #00B4D8;
  --color-accent-hover: #0096B7;
  --color-light: #F8F9FA;
  --color-dark-text: #1A1A2E;
  --color-muted: #6B7280;
  --color-white: #FFFFFF;

  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3.5rem;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Layout */
  --max-width: 1200px;
  --border-radius: 8px;
  --border-radius-lg: 12px;

  /* Transitions */
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-dark-text);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
  list-style: none;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-3xl) 0;
}

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

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-dark-text);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

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

p {
  margin-bottom: var(--space-sm);
  color: var(--color-dark-text);
}

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

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

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-muted);
  max-width: 600px;
  margin: var(--space-sm) auto var(--space-2xl);
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--space-sm) 0;
  transition: background-color var(--transition), box-shadow var(--transition);
}

.header--scrolled {
  background-color: var(--color-primary);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-white);
  text-decoration: none;
}

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

.header__logo svg {
  width: 36px;
  height: 36px;
}

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

.nav__link {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: color var(--transition);
}

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

.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  margin: 5px 0;
  transition: transform var(--transition), opacity var(--transition);
}

/* --- Footer --- */
.footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.75);
  padding: var(--space-3xl) 0 var(--space-lg);
}

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

.footer__brand p {
  color: rgba(255, 255, 255, 0.65);
  margin-top: var(--space-sm);
  max-width: 300px;
}

.footer__heading {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-md);
}

.footer__links li {
  margin-bottom: var(--space-xs);
}

.footer__links a {
  color: rgba(255, 255, 255, 0.65);
  font-size: var(--font-size-sm);
  transition: color var(--transition);
}

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

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
}

.footer__social {
  display: flex;
  gap: var(--space-sm);
}

.footer__social a {
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition);
}

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

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-align: center;
  text-decoration: none;
}

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

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

.btn--secondary {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

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

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

.btn--white:hover {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

/* --- Cards --- */
.card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
}

.card__icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

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

.card__text {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
}

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

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* --- Forms --- */
.form__group {
  margin-bottom: var(--space-md);
}

.form__label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--space-xs);
  color: var(--color-dark-text);
}

.form__input,
.form__textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #D1D5DB;
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-dark-text);
  background-color: var(--color-white);
  transition: border-color var(--transition);
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.1);
}

.form__textarea {
  resize: vertical;
  min-height: 150px;
}

.form__input--error {
  border-color: #EF4444;
}

.form__error {
  color: #EF4444;
  font-size: var(--font-size-sm);
  margin-top: 0.25rem;
  display: none;
}

.form__success {
  background-color: #D1FAE5;
  color: #065F46;
  padding: var(--space-md);
  border-radius: var(--border-radius);
  text-align: center;
  display: none;
}

/* --- Utilities --- */
.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;
}

/* --- Hero --- */
.hero {
  padding-top: calc(var(--space-3xl) + 80px);
  padding-bottom: var(--space-3xl);
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero__content {
  max-width: 700px;
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.75);
  margin: var(--space-md) 0 var(--space-2xl);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* --- Page Header --- */
.page-header {
  padding-top: calc(var(--space-3xl) + 80px);
  padding-bottom: var(--space-2xl);
}

/* --- Service Detail --- */
.service-detail {
  max-width: 800px;
}

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

.service-detail h2 {
  margin-bottom: var(--space-md);
}

.service-detail p {
  font-size: var(--font-size-lg);
  color: var(--color-muted);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.service-detail__benefits {
  list-style: none;
}

.service-detail__benefits li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-dark-text);
}

.service-detail__benefits li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

/* --- About --- */
.about-block {
  max-width: 800px;
}

.about-block h2 {
  margin-bottom: var(--space-md);
}

.about-block p {
  font-size: var(--font-size-lg);
  color: var(--color-muted);
  line-height: 1.8;
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: var(--color-light);
  margin: 0 auto var(--space-md);
  border: 3px solid var(--color-accent);
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-form-wrapper h2 {
  margin-bottom: var(--space-xs);
}

.contact-info__block {
  margin-bottom: var(--space-2xl);
}

.contact-info__block h3 {
  margin-bottom: var(--space-xs);
}

.contact-info__block p {
  font-size: var(--font-size-lg);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  h1 { font-size: var(--font-size-3xl); }
  h2 { font-size: var(--font-size-2xl); }

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

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

@media (max-width: 768px) {
  h1 { font-size: var(--font-size-2xl); }
  h2 { font-size: var(--font-size-xl); }

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

  /* Mobile nav */
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--color-primary);
    padding: var(--space-3xl) var(--space-lg);
    transition: right var(--transition);
    z-index: 999;
  }

  .nav--open {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    gap: var(--space-md);
  }

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

  .nav__toggle {
    display: block;
    z-index: 1001;
  }

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

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

  .nav__toggle--active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .nav__overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
  }

  .nav__overlay--visible {
    display: block;
  }

  /* Grid responsive */
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

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

  /* Footer responsive */
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

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