/* ===================================
   Over I.T. — Styles
   Technology Made Simple
   =================================== */

/* --- CSS Custom Properties --- */
:root {
  /* Colors - Light mode */
  --color-bg: #fafafa;
  --color-bg-alt: #ffffff;
  --color-text: #1a1a2e;
  --color-text-muted: #3d3d52;
  --color-accent: #4f46e5;
  --color-accent-hover: #4338ca;
  --color-accent-light: rgba(79, 70, 229, 0.08);
  --color-border: #e2e2e8;
  --color-surface: #ffffff;
  --color-surface-hover: #f5f5fa;
  --color-success: #059669;
  --color-error: #dc2626;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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;
  --line-height: 1.6;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --max-width: 1200px;
  --border-radius: 0.75rem;
  --border-radius-sm: 0.375rem;

  /* Transitions */
  --transition: 0.3s ease;
  --transition-fast: 0.15s ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
}

/* --- Dark Mode --- */
[data-theme="dark"] {
  --color-bg: #0f0f1a;
  --color-bg-alt: #1a1a2e;
  --color-text: #e8e8f0;
  --color-text-muted: #a0a0b8;
  --color-accent: #818cf8;
  --color-accent-hover: #a5b4fc;
  --color-accent-light: rgba(129, 140, 248, 0.1);
  --color-border: #2a2a40;
  --color-surface: #1e1e32;
  --color-surface-hover: #252540;
  --color-success: #34d399;
  --color-error: #f87171;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  -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-fast);
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

ul {
  list-style: none;
}

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius-sm);
  z-index: 1000;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-md);
}

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

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3xl);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
}

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

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

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

.btn-outline:hover {
  background-color: var(--color-accent);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  transform: none;
}

.coming-soon-label {
  display: block;
  font-size: var(--font-size-xs, 0.75rem);
  color: var(--color-text-muted);
  margin-top: var(--space-xs, 0.25rem);
  font-style: italic;
}

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 250, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

[data-theme="dark"] .site-header {
  background: rgba(15, 15, 26, 0.9);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
}

.nav-links a {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

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

.nav-links a.active {
  color: var(--color-accent);
  font-weight: 700;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: var(--space-sm);
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: 50%;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.icon-moon {
  display: none;
}

[data-theme="dark"] .icon-sun {
  display: none;
}

[data-theme="dark"] .icon-moon {
  display: block;
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-4xl) var(--space-lg);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--color-accent-light) 0%, transparent 60%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, var(--color-text), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

/* --- Services --- */
.services {
  padding: var(--space-4xl) 0;
  text-align: center;
}

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

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-2xl);
  text-align: left;
  transition: all var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  background: var(--color-accent-light);
  border-radius: var(--border-radius);
  margin-bottom: var(--space-lg);
  color: var(--color-accent);
}

.service-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.service-card p {
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- About --- */
.about {
  padding: var(--space-4xl) 0;
  background: var(--color-bg-alt);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.about-content .section-title {
  text-align: left;
}

.about-text {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-lg);
  line-height: 1.8;
}

.about-founder {
  text-align: center;
  padding: var(--space-2xl);
  background: var(--color-surface);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
}

.founder-photo-placeholder {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-lg);
  border-radius: 50% !important;
  background: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.founder-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.founder-role {
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.founder-bio {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* --- How It Works --- */
.how-it-works {
  padding: var(--space-4xl) 0;
  text-align: center;
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  counter-reset: step;
}

.step {
  padding: var(--space-2xl);
  background: var(--color-surface);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: #ffffff;
  font-size: var(--font-size-xl);
  font-weight: 800;
  border-radius: 50%;
  margin-bottom: var(--space-lg);
}

.step h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

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

/* --- Contact --- */
.contact {
  padding: var(--space-4xl) 0;
  background: var(--color-bg-alt);
  text-align: center;
}

/* Contact Card */
.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  max-width: 560px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-2xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: calc(var(--border-radius) * 1.5);
  box-shadow: var(--shadow-lg);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.contact-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 12px 40px rgba(79, 70, 229, 0.12);
}

[data-theme="dark"] .contact-card:hover {
  box-shadow: 0 12px 40px rgba(129, 140, 248, 0.15);
}

.contact-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  background: var(--color-accent-light);
  border-radius: var(--border-radius);
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-card-label {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  line-height: 1.6;
  max-width: 38ch;
}

.contact-email-link {
  display: inline-block;
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.01em;
  word-break: break-all;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-accent-light);
  border-radius: var(--border-radius-sm);
  border: 1px solid transparent;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.contact-email-link:hover {
  background: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.contact-email-btn {
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

/* --- Footer --- */
.site-footer {
  padding: var(--space-3xl) 0 var(--space-xl);
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
}

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

.footer-brand .logo-text {
  display: block;
  margin-bottom: var(--space-sm);
}

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

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-nav a {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

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

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-accent-light);
  color: var(--color-accent);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-accent);
  color: #ffffff;
}

.footer-cta {
  text-align: center;
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-lg);
}

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

.footer-cta a {
  font-weight: 600;
}

.footer-bottom {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

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

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

/* --- Responsive --- */
@media (min-width: 640px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 768px) {
  .section-title {
    font-size: var(--font-size-3xl);
  }

  .about-grid {
    grid-template-columns: 1.5fr 1fr;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
    align-items: start;
  }
}

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

/* Mobile menu */
@media (max-width: 767px) {
  .mobile-menu-btn {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-lg);
    gap: var(--space-md);
    display: flex;
    visibility: hidden;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: opacity var(--transition), max-height var(--transition), visibility var(--transition);
  }

  .nav-links.open {
    visibility: visible;
    opacity: 1;
    max-height: 500px;
    overflow: visible;
  }

  .nav-links a {
    font-size: var(--font-size-base);
    padding: var(--space-sm) 0;
  }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

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

  .btn:hover,
  .btn-outline:hover {
    transform: none;
  }
}

/* --- Print --- */
@media print {
  .site-header,
  .theme-toggle,
  .mobile-menu-btn,
  .hero-bg {
    display: none;
  }

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