/* Modern Portfolio CSS - Core Styles */

/* CSS Variables for consistent theming */
:root {
  /* Colors */
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #f59e0b;
  --accent-color: #10b981;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-dark: #111827;
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Spacing */
  --container-max-width: 1200px;
  --section-padding: 5rem 0;
  --border-radius: 0.75rem;
  --border-radius-lg: 1rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* Dark mode variables */
[data-theme="dark"] {
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-light: #9ca3af;
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --bg-dark: #030712;
  --border-color: #374151;
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  margin: 0;
  padding: 0;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Main content spacing */

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

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

/* Buttons */
.btn-primary, .cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover, .cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary, .cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-secondary:hover, .cta-secondary:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-left: 0.5rem;
}

.theme-toggle:hover {
  background: var(--bg-secondary);
  color: var(--primary-color);
}

.theme-toggle i {
  font-size: 0.9rem;
}

/* Section headers */
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header.centered {
  text-align: center;
}

.section-tag {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.section-title {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.section-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  z-index: 1000;
  padding: 0;
  height: 80px;
  transition: all 0.3s ease;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .header {
  background: rgba(15, 23, 42, 0.95);
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
  box-shadow: 0 2px 30px rgba(0, 0, 0, 0.4);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  padding: 0 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  font-family: var(--font-heading);
  letter-spacing: -0.5px;
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.logo-image {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--primary-color);
  transition: all 0.3s ease;
  position: relative;
  flex-shrink: 0;
}

[data-theme="dark"] .logo-image {
  border: 2px solid transparent;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  box-shadow: 0 4px 15px rgba(96, 165, 250, 0.3);
}

.logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.logo-content {
  display: flex;
  align-items: center;
}

.logo-text {
  color: var(--text-primary);
}

.logo-dot {
  color: var(--primary-color);
  margin-left: -2px;
}

.logo:hover {
  transform: translateY(-2px);
}

.logo:hover .logo-image {
  transform: scale(1.1);
  box-shadow: 0 8px 25px rgba(96, 165, 250, 0.4);
}

[data-theme="dark"] .logo:hover .logo-image {
  box-shadow: 0 8px 25px rgba(96, 165, 250, 0.5);
}

.logo:hover .logo-img {
  transform: scale(1.05);
}

.nav-menu {
  display: flex;
  align-items: center;
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1.5rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.75rem 1rem;
  position: relative;
  transition: all 0.3s ease;
  border-radius: 8px;
}

[data-theme="dark"] .nav-link {
  color: rgba(226, 232, 240, 0.9);
}

.nav-link:hover {
  color: var(--primary-color);
  background: rgba(96, 165, 250, 0.1);
}

[data-theme="dark"] .nav-link:hover {
  background: rgba(96, 165, 250, 0.15);
  color: #60a5fa;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  transition: all 0.3s ease;
  transform: translateX(-50%);
  border-radius: 2px;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

[data-theme="dark"] .nav-link::after {
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  box-shadow: 0 0 8px rgba(96, 165, 250, 0.5);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  font-size: 1rem;
}

.theme-toggle:hover {
  background: rgba(96, 165, 250, 0.1);
  border-color: var(--primary-color);
  transform: scale(1.1);
}

[data-theme="dark"] .theme-toggle {
  background: rgba(51, 65, 85, 0.8);
  border-color: rgba(148, 163, 184, 0.3);
  color: rgba(226, 232, 240, 0.9);
}

[data-theme="dark"] .theme-toggle:hover {
  background: rgba(96, 165, 250, 0.2);
  box-shadow: 0 4px 15px rgba(96, 165, 250, 0.3);
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.hamburger-line {
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

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

.hamburger.active .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

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

.mobile-icon-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  list-style: none;
  padding: 1.5rem 0;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 1000;
}

.mobile-icon-menu.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu-item {
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border-color);
}

.mobile-menu-item:last-child {
  border-bottom: none;
}

.mobile-menu-link {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.125rem;
  text-decoration: none;
  transition: all var(--transition-normal);
}

.mobile-menu-link:hover {
  color: var(--primary-color);
}


/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 30px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.hamburger-line {
  width: 100%;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

[data-theme="dark"] .hamburger-line {
  background: rgba(226, 232, 240, 0.9);
}

/* Mobile Header */
@media (max-width: 768px) {
  .header {
    padding: 0.75rem 0;
  }
  
  .nav-container {
    padding: 0 1rem;
  }
  
  .hamburger {
    display: flex;
  }
  
  .logo {
    font-size: 1.25rem;
  }
  
  .logo-image {
    width: 40px;
    height: 40px;
  }
  
  .nav-menu {
    position: fixed;
    top: 90px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 90px);
    background: var(--bg-primary);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding: 2rem 0;
    transition: left 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-list {
    flex-direction: column;
    gap: 2rem;
    width: 100%;
    text-align: center;
  }
  
  .nav-link {
    font-size: 1.2rem;
    padding: 1rem;
    width: 100%;
    display: block;
  }
  
  .nav-link:last-child {
    border-bottom: none;
  }
  
  .nav-container {
    padding: 0 1rem;
  }
  
}