/* =====================================================
   PORTFOLIO WEBSITE - MINIMALIST STYLE
   Light Mode | Apple-Inspired Design
   ===================================================== */

/* ===== IMPORTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Roboto:wght@300;400;500;700&display=swap');

/* ===== ROOT VARIABLES ===== */
:root {
  /* Colors - Light Mode */
  --primary-bg: #ffffff;
  --secondary-bg: #f5f5f7;
  --text-primary: #1d1d1f;
  --text-secondary: #666666;
  --text-light: #999999;
  --accent-color: #0071e3;
  --accent-hover: #0077ed;
  --border-color: #e5e5e7;
  --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-large: 0 8px 32px rgba(0, 0, 0, 0.15);

  /* Typography */
  --font-family: 'Inter', 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-body: 14px;
  --font-size-small: 13px;
  --font-size-large: 16px;
  --line-height-base: 1.55;
  --letter-spacing: 0.3px;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --page-gutter: clamp(24px, 5vw, 64px);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.6s ease;
}

/* ===== GLOBAL STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-small);
  line-height: var(--line-height-base);
  color: var(--text-primary);
  background-color: var(--primary-bg);
  letter-spacing: var(--letter-spacing);
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.5px;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.2;
}

h2 {
  font-size: 31px;
  font-weight: 700;
  line-height: 1.3;
}

h3 {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.3;
}

h4 {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.4;
}

h5 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
}

h6 {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
}

p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

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

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

/* ===== NAVIGATION ===== */
.navbar {
  background-color: var(--primary-bg);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.95);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--page-gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-primary);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 20px;
  font-size: var(--font-size-body);
  font-weight: 500;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  gap: var(--spacing-sm);
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: var(--shadow-medium);
}

.btn-secondary {
  background-color: var(--secondary-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--primary-bg);
  border-color: var(--text-light);
}

.btn-lg {
  padding: 12px 26px;
  font-size: var(--font-size-large);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== SECTIONS ===== */
.section {
  padding: var(--spacing-3xl) 0;
}

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

.section-gray {
  background-color: var(--secondary-bg);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--page-gutter);
  width: 100%;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
  margin-bottom: var(--spacing-md);
}

.section-title p {
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-secondary);
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #ffffff 0%, #f5f5f7 100%);
  padding: var(--spacing-3xl) 0;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-text h1 {
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.hero-text p {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
  color: var(--text-secondary);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero-image {
  width: 100%;
  max-width: 800px;
  aspect-ratio: 1;
  border-radius: var(--radius-xl);
  object-fit: cover;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== VISION & MISSION ===== */
.vision-mission {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  margin-bottom: var(--spacing-3xl);
}

.vision-mission-content h3 {
  margin-bottom: var(--spacing-md);
}

.vision-mission-content p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

.vision-mission-icons {
  width: 100%;
  height: 400px;
  background: linear-gradient(135deg, rgba(0, 113, 227, 0.1) 0%, rgba(0, 113, 227, 0.05) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.vision-mission-icons svg {
  width: 80px;
  height: 80px;
  opacity: 0.6;
}

/* ===== CARDS ===== */
.card {
  background-color: var(--primary-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all var(--transition-normal);
}

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

.card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--secondary-bg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.card-description {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ===== GRID LAYOUTS ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--secondary-bg);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-3xl);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--page-gutter);
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-column h4 {
  margin-bottom: var(--spacing-md);
  font-size: 16px;
}

.footer-column ul {
  list-style: none;
}

.footer-column ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-column a {
  color: var(--text-secondary);
  font-size: 14px;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: var(--page-gutter);
  padding-right: var(--page-gutter);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  font-size: 14px;
  color: var(--text-light);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--primary-bg);
  border-radius: 50%;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background-color: var(--accent-color);
  color: white;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 25px;
  }

  h3 {
    font-size: 21px;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    gap: var(--spacing-md);
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--primary-bg);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .vision-mission {
    grid-template-columns: 1fr;
  }

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

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

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

  .hero {
    min-height: auto;
    padding: var(--spacing-2xl) 0;
  }
}

@media (max-width: 480px) {
  :root {
    --page-gutter: 20px;
  }

  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 21px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

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

/* ===== UTILITY CLASSES ===== */
.text-center {
  text-align: center;
}

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

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-2xl); }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mt-5 { margin-top: var(--spacing-2xl); }

.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }
.gap-4 { gap: var(--spacing-xl); }

.rounded-lg {
  border-radius: var(--radius-lg);
}

.shadow-sm {
  box-shadow: var(--shadow-light);
}

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

.shadow-lg {
  box-shadow: var(--shadow-large);
}