/* ==========================================================================
   ORIENTEK - Global Baseline Configuration
   ========================================================================== */

:root {
  /* Brand Palette */
  --color-canvas: #0B132B; /* Deep Corporate Navy */
  --color-surface: #1C2541; /* Slate mid-tones */
  --color-surface-light: #283044;
  --color-accent: #00F0FF; /* Vibrant Tech Cyan */
  --color-accent-hover: #00B4CC;
  
  /* Text & Readability */
  --color-text-primary: #FFFFFF; /* Crisp White for Headings */
  --color-text-secondary: #A0AAB2; /* Soft Silver/Cool Gray */

  /* Typography System */
  --font-system: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  /* Fluid Typography Scale */
  /* Formula: clamp(min-size, calc(min-size + viewport-width-factor), max-size) */
  --text-xs: clamp(0.75rem, 0.71rem + 0.18vw, 0.85rem);
  --text-sm: clamp(0.875rem, 0.83rem + 0.22vw, 1rem);
  --text-base: clamp(1rem, 0.96rem + 0.22vw, 1.125rem);
  --text-md: clamp(1.125rem, 1.08rem + 0.22vw, 1.25rem);
  --text-lg: clamp(1.25rem, 1.16rem + 0.44vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.35rem + 0.73vw, 2rem);
  --text-2xl: clamp(2rem, 1.76rem + 1.2vw, 2.75rem);
  --text-3xl: clamp(2.5rem, 2.13rem + 1.82vw, 3.5rem);
  --text-4xl: clamp(3rem, 2.45rem + 2.73vw, 4.5rem);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Clean Reset & Structural Alignment
   ========================================================================== */

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

html {
  font-size: 100%; /* 16px base */
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-canvas);
  color: var(--color-text-secondary);
  font-family: var(--font-system);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Typography Rules
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-md); }

p {
  font-size: var(--text-base);
  margin-bottom: var(--space-md);
  max-width: 65ch; /* Optimal reading width for enterprise content */
}

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

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

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ==========================================================================
   Layout Base & Utilities
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

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

.surface-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-surface-light);
  border-radius: 8px;
  padding: var(--space-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.surface-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--color-accent);
  color: var(--color-canvas);
  font-weight: 600;
  font-size: var(--text-md);
  border-radius: 4px;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn:hover, a.btn:hover, a.btn:focus {
  background-color: var(--color-accent-hover);
  color: var(--color-canvas);
  transform: scale(1.02);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-outline:hover, a.btn-outline:hover, a.btn-outline:focus {
  background-color: rgba(0, 240, 255, 0.1);
  color: var(--color-accent);
}

/* ==========================================================================
   Hardware-Accelerated Animations
   ========================================================================== */

.fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  will-change: opacity, transform;
}

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

/* ==========================================================================
   New Components (Testimonials, Forms, Profiles, Layouts)
   ========================================================================== */

/* Testimonial Blockquote */
.testimonial {
  border-left: 4px solid var(--color-accent);
  padding-left: var(--space-md);
  margin-block: var(--space-xl);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text-primary);
}

.testimonial-author {
  display: block;
  margin-top: var(--space-sm);
  font-weight: 600;
  font-style: normal;
  font-size: var(--text-base);
  color: var(--color-text-secondary);
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

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

/* Form Shell */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 600;
  color: var(--color-text-primary);
}

.form-control {
  width: 100%;
  padding: var(--space-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-surface-light);
  border-radius: 4px;
  color: var(--color-text-primary);
  font-family: var(--font-system);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(0, 240, 255, 0.2);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

/* Team Profile */
.team-card h3 {
  font-size: var(--text-xl);
  margin-bottom: 0;
  color: var(--color-text-primary);
}

.team-role {
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

/* Marquee / Logo Strip Wrapper (Text only) */
.client-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
  justify-content: center;
  align-items: center;
  opacity: 0.6;
}

.client-logo-text {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-secondary);
}

.client-strip .client-logo-text:hover {
  opacity: 1;
  color: var(--color-text-primary);
}

/* ==========================================================================
   Header & Mobile Navigation
   ========================================================================== */

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

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

.mobile-menu-btn svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

/* Base link styles in nav */
.header-nav a {
  font-size: var(--text-base);
}

/* Hide close button on desktop */
.mobile-close-btn {
  display: none;
}

@media (max-width: 768px) {
  /* Fix client-strip layout on mobile */
  .client-strip {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    text-align: center;
  }

  .mobile-menu-btn {
    display: block;
    z-index: 101;
  }
  
  .header-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 100%;
    height: 100vh;
    background-color: rgba(11, 19, 43, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-2xl);
    box-shadow: none;
    transition: right var(--transition-normal);
    z-index: 105;
  }

  .header-nav.is-open {
    right: 0;
  }
  
  .header-nav a {
    font-size: var(--text-2xl);
    font-weight: 700;
  }

  /* Overlay - no longer strictly needed for full screen, but kept for JS compatibility */
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 99;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
  }

  .nav-overlay.is-open {
    opacity: 1;
    pointer-events: auto;
  }

  /* Close button inside menu */
  .mobile-close-btn {
    display: block;
    position: absolute;
    top: var(--space-md);
    right: var(--space-lg);
    background: none;
    border: none;
    color: var(--color-accent);
    cursor: pointer;
    padding: var(--space-xs);
  }
  
  .mobile-close-btn svg {
    width: 32px;
    height: 32px;
    fill: currentColor;
  }
}