@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap");

/* CSS Custom Properties for Theming */
:root {
  /* Modern Monochrome Palette (Light Mode) */
  --primary-color: #000000;
  --primary-light: #27272a;
  --primary-dark: #000000;
  --secondary-color: #3f3f46;
  --accent-color: #18181b;

  --bg-primary: #ffffff;
  --bg-secondary: #f4f4f5;
  --bg-tertiary: #fafafa;
  --bg-navbar: rgba(255, 255, 255, 0.85);
  
  --bg-glass: rgba(255, 255, 255, 0.75);
  --bg-glass-border: rgba(0, 0, 0, 0.1);

  --text-primary: #000000;
  --text-secondary: #3f3f46;
  --text-muted: #71717a;

  --border-color: #e4e4e7;
  --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
  --shadow-heavy: 0 20px 25px -5px rgba(0, 0, 0, 0.12);

  --gradient-primary: linear-gradient(135deg, #000000 0%, #3f3f46 100%);
  --gradient-text: linear-gradient(135deg, #000000 0%, #52525b 100%);

  /* Typography */
  --font-family:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

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

  /* Border Radius */
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-2xl: 40px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* Dark Theme Colors */
[data-theme="dark"] {
  --primary-color: #ffffff;
  --primary-light: #f4f4f5;
  --primary-dark: #e4e4e7;
  --secondary-color: #a1a1aa;
  --accent-color: #ffffff;

  --bg-primary: #000000;
  --bg-secondary: #09090b;
  --bg-tertiary: #18181b;
  --bg-navbar: rgba(0, 0, 0, 0.85);

  --bg-glass: rgba(24, 24, 27, 0.75);
  --bg-glass-border: rgba(255, 255, 255, 0.15);

  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;

  --border-color: #27272a;
  --shadow-light: 0 4px 6px -1px rgba(255, 255, 255, 0.03);
  --shadow-medium: 0 10px 15px -3px rgba(255, 255, 255, 0.05);
  --shadow-heavy: 0 20px 25px -5px rgba(255, 255, 255, 0.08);

  --gradient-primary: linear-gradient(135deg, #ffffff 0%, #a1a1aa 100%);
  --gradient-text: linear-gradient(135deg, #ffffff 0%, #d4d4d8 100%);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal);
  overflow-x: hidden;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition:
    opacity var(--transition-slow),
    visibility var(--transition-slow);
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none !important;
}

.loader {
  text-align: center;
}

.loader-circle {
  width: 60px;
  height: 60px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-md);
}

.loader-text {
  color: white;
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: 2px;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--bg-navbar);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 10000;
  transition: all var(--transition-normal);
}

[data-theme="dark"] .navbar {
  background: var(--bg-navbar);
  border-bottom: 1px solid var(--border-color);
}

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

.logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-accent {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: var(--spacing-xl);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
  background: var(--bg-tertiary);
}

.nav-link i {
  font-size: var(--font-size-sm);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
  z-index: 10001;
  pointer-events: auto !important;
}

.theme-toggle i {
  pointer-events: none;
}

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

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--bg-primary);
  z-index: 2000;
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.mobile-menu-close {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--text-primary);
  cursor: pointer;
}

.mobile-menu-links {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: var(--spacing-xl);
  gap: var(--spacing-lg);
}

.mobile-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--font-size-lg);
  font-weight: 500;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-link:hover {
  background: var(--bg-secondary);
  color: var(--primary-color);
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  overflow: hidden;
  z-index: 0;
}

/* remove heavy decorative blobs for a more professional look */
.hero-particles {
  display: none;
}

/* blob animation removed for professional tone */

.hero-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  position: relative;
  z-index: 1;
}

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

.hero-greeting {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.wave {
  font-size: var(--font-size-2xl);
  /* no animation for a professional look */
}

.greeting-text {
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
}

.name {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
}

.hero-subtitle {
  font-size: var(--font-size-2xl);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  min-height: 2rem;
}

.typing-text {
  color: var(--primary-color);
  font-weight: 600;
}

.cursor {
  animation: blink 1s infinite;
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  position: relative;
  z-index: 100;
  pointer-events: auto !important;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 11px 22px;
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  position: relative;
  z-index: 101;
  pointer-events: auto !important;
}

.btn i {
  pointer-events: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  border: none;
  box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
  box-shadow: var(--shadow-heavy);
  transform: translateY(-2px);
  filter: brightness(1.1);
}

.btn-secondary,
.btn-outline {
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover,
.btn-outline:hover {
  background: var(--bg-tertiary);
  transform: translateY(-2px);
}

.image-container {
  position: relative;
  width: 360px;
  height: 360px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-medium);
}

.image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.25s ease;
}

.image-container:hover img {
  transform: none; /* disable zoom on hover for professionalism */
}

.image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.05);
  pointer-events: none;
}

.floating-card {
  position: absolute;
  bottom: 16px;
  right: 16px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0.5rem 0.8rem;
  border-radius: 10px;
  box-shadow: var(--shadow-medium);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--bg-glass-border);
}

.floating-card i {
  color: var(--primary-color);
  font-size: var(--font-size-lg);
}

.floating-card span {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-2xl);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--text-secondary);
}

.scroll-text {
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-sm);
}

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

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

/* Section Styles */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
}

/* About Section */
.about-section {
  padding: var(--spacing-3xl) 0;
  background: var(--bg-secondary);
}

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

.about-image {
  position: relative;
  display: flex;
  justify-content: center;
}

.about-image img {
  width: 350px;
  height: 350px;
  border-radius: var(--radius-2xl);
  object-fit: cover;
  box-shadow: var(--shadow-heavy);
  transition: transform var(--transition-normal);
  border: 1px solid var(--border-color);
}

.about-image img:hover {
  transform: scale(1.02);
}

.experience-badge {
  position: absolute;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05); /* very soft shadow */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 0.5px solid var(--border-color);
  transform: translateY(0);
  transition: transform var(--transition-normal);
}

.experience-badge:hover {
  transform: translateY(-5px);
}

.experience-badge .years {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.2rem;
}

.experience-badge .text {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.about-text h3 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

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

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

.stat-item {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-light);
  border: 1px solid var(--bg-glass-border);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-light);
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

.about-actions {
  display: flex;
  gap: var(--spacing-md);
}

/* Skills Section */
.skills-section {
  padding: var(--spacing-3xl) 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.skill-category {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-light);
  transition: all var(--transition-normal);
  border: 1px solid var(--bg-glass-border);
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-light);
}

.skill-category h3 {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.skill-category h3 i {
  color: var(--primary-color);
}

.skill-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.skill-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.skill-item:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-light);
  border-color: var(--primary-light);
}

.skill-item i {
  font-size: var(--font-size-xl);
  color: var(--primary-color);
  width: 30px;
}

.skill-item span {
  flex: 1;
  font-weight: 500;
  color: var(--text-primary);
}

.skill-level {
  width: 60px;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.skill-level::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 3px;
  width: var(--level);
  transition: width 1s ease;
}

/* Projects Section */
.projects-section {
  padding: var(--spacing-3xl) 0;
  background: var(--bg-secondary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

.project-card {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-light);
  padding: var(--spacing-xl);
  margin-bottom: 1.2rem;
  text-align: left;
  min-width: 0;
  max-width: 100%;
  border: 1px solid var(--bg-glass-border);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-heavy);
  border-color: var(--primary-light);
}

.project-content h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.project-content p {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

.project-tech {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: auto;
}

.tech-tag {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border: 0.5px solid var(--border-color);
}

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

/* Contact Section */
.contact-section {
  padding: var(--spacing-3xl) 0;
}

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

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-fast);
}

.contact-item:hover {
  transform: translateX(5px);
}

.contact-icon {
  width: 60px;
  height: 60px;
  background: var(--bg-primary);
  border: 0.5px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: var(--font-size-xl);
}

.contact-details h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.contact-details p {
  color: var(--text-secondary);
}

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

.social-link {
  width: 50px;
  height: 50px;
  background: var(--bg-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-3px);
}

/* Contact Form */
.contact-form {
  background: var(--bg-secondary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-light);
}

.form-group {
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border: 0.5px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--text-primary);
  box-shadow: 0 0 0 1px var(--text-primary);
}

.form-group label {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  color: var(--text-muted);
  transition: all var(--transition-fast);
  pointer-events: none;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: -10px;
  left: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--primary-color);
  background: var(--bg-secondary);
  padding: 0 var(--spacing-xs);
}

/* Footer */
.footer {
  background: var(--bg-primary);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  border-top: 0.5px solid var(--border-color);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-logo h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  letter-spacing: -0.5px;
}

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

.footer-logo p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.footer-links {
  display: flex;
  flex-direction: row;
  gap: var(--spacing-lg);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
}

.footer-social a {
  width: 36px;
  height: 36px;
  background: transparent;
  border: 0.5px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
  transform: translateY(-2px);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 0.5px solid var(--border-color);
  color: var(--text-muted);
  font-size: var(--font-size-xs);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: calc(var(--spacing-xl) + 70px);
  right: var(--spacing-xl);
  width: 50px;
  height: 50px;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 0.5px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 1000;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05); /* very soft shadow */
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-2xl);
  }

  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-xl);
  }
}

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

  .mobile-menu-toggle {
    display: flex;
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .hero-actions {
    justify-content: center;
  }

  .image-container {
    width: 300px;
    height: 300px;
  }

  .about-image img {
    width: 250px;
    height: 250px;
  }

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

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

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

  .container {
    padding: 0 var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-xl);
  }

  .section-title {
    font-size: var(--font-size-3xl);
  }

  .image-container {
    width: 250px;
    height: 250px;
  }

  .about-image img {
    width: 200px;
    height: 200px;
  }

  .btn {
    padding: 9px 18px;
    font-size: 12px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 600px) {
  html,
  body,
  .about-page {
    height: auto !important;
    min-height: 100vh !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
  }
  .about-hero {
    flex-direction: column !important;
    gap: 1.2rem !important;
    margin-bottom: 1.2rem !important;
    padding: 0 !important;
    align-items: center !important;
    justify-content: flex-start !important;
  }
  .about-hero-content {
    flex-direction: column !important;
    gap: 1.2rem !important;
    padding: 0 !important;
    align-items: center !important;
    justify-content: flex-start !important;
    width: 100% !important;
  }
  .about-hero-image {
    margin: 0 auto 0.5rem auto !important;
    max-width: 180px !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    width: 100% !important;
  }
  .about-hero-image img {
    width: 220px !important;
    height: 220px !important;
    margin: 0 auto !important;
    border-radius: 1.5rem !important;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08) !important;
    display: block !important;
  }
  .about-hero-text {
    text-align: center !important;
    padding: 0 0.5rem !important;
    margin: 0 auto !important;
  }
  .about-stats {
    grid-template-columns: 1fr !important;
    gap: 0.7rem !important;
    margin-bottom: 1rem !important;
  }
  .stat-item {
    padding: 0.7rem 0.2rem !important;
    margin: 0 auto !important;
    text-align: center !important;
    width: 100% !important;
  }
  .nav-links {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .hero-actions {
    justify-content: center;
  }

  .image-container {
    width: 300px;
    height: 300px;
  }

  .about-image img {
    width: 250px;
    height: 250px;
  }

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

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

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

  .container {
    padding: 0 var(--spacing-md);
  }
  nav.navbar,
  .navbar {
    padding: 0.5rem 0.2rem !important;
    min-height: 56px;
  }
  .nav-container {
    padding: 0.2rem 0.2rem !important;
  }
  .logo {
    font-size: 1.2rem;
  }
  .nav-links {
    gap: 0.5rem;
  }
  .section-header {
    margin-bottom: 1rem;
    padding: 0 0.2rem;
  }
  .section-title {
    font-size: 1.15rem;
    margin-bottom: 0.3rem;
  }
  .section-subtitle {
    font-size: 1rem;
    margin-bottom: 0.5rem;
  }
  .about-section,
  .skills-section,
  .contact-section,
  .footer {
    padding: 1.2rem 0.2rem !important;
  }
  .about-content,
  .skills-grid,
  .contact-content,
  .footer-content {
    flex-direction: column !important;
    gap: 1rem !important;
    text-align: center;
  }
  .about-image img,
  .about-hero-image img {
    max-width: 120px !important;
    height: 120px !important;
    margin: 0 auto 1rem auto !important;
  }
  .about-text h3,
  .skills-section h2,
  .contact-section h2 {
    font-size: 1.1rem;
  }
  .about-text p,
  .skills-section p,
  .contact-section p {
    font-size: 1rem;
  }
  .btn {
    font-size: 13px;
    padding: 10px 20px;
    margin-bottom: 0.5rem;
  }
  .footer {
    padding: 1.2rem 0.2rem 0.7rem 0.2rem !important;
  }
  .footer-logo h3 {
    font-size: 1.05rem;
  }
  .footer-links {
    flex-direction: column !important;
    gap: 0.5rem !important;
  }
  .footer-links a {
    font-size: 1rem;
  }
  .footer-bottom {
    font-size: 0.95rem;
    padding-top: 0.5rem;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}
.text-left {
  text-align: left;
}
.text-right {
  text-align: right;
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}
.mb-md {
  margin-bottom: var(--spacing-md);
}
.mb-lg {
  margin-bottom: var(--spacing-lg);
}
.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.mt-sm {
  margin-top: var(--spacing-sm);
}
.mt-md {
  margin-top: var(--spacing-md);
}
.mt-lg {
  margin-top: var(--spacing-lg);
}
.mt-xl {
  margin-top: var(--spacing-xl);
}

.hidden {
  display: none;
}
.visible {
  display: block;
}

/* Animation Classes */
.fade-in {
  animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.slide-in-left {
  animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-in-right {
  animation: slideInRight 0.6s ease-out;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* --- ABOUT PAGE STYLES --- */
.about-page {
  padding-top: 100px;
  padding-bottom: 40px;
}
.about-hero {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}
.about-hero-content {
  display: flex;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
  width: 100%;
  justify-content: center;
}
.about-hero-image {
  flex: 0 0 320px;
  max-width: 350px;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.about-hero-image img {
  width: 100%;
  max-width: 320px;
  height: 320px;
  object-fit: cover;
  border-radius: 1.5rem;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  background: none;
}
.about-hero-image .image-overlay {
  display: none;
}
.about-hero-text {
  flex: 1 1 350px;
  min-width: 280px;
  max-width: 600px;
}
.about-hero-text h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.about-hero-text .subtitle {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 1rem;
}
.about-hero-text .description {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}
.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 1rem;
}
.hero-stats .stat {
  text-align: center;
}
.hero-stats .number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}
.hero-stats .label {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* About Sections */
.about-sections {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}
.about-section {
  background: var(--bg-secondary);
  border-radius: 1rem;
  box-shadow: var(--shadow-light);
  padding: 2rem 1.5rem;
}
.section-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.info-item {
  margin-bottom: 0.5rem;
}
.info-item .label {
  font-weight: 600;
  color: var(--text-primary);
}
.info-item .value {
  color: var(--text-secondary);
}
.timeline {
  border-left: 3px solid var(--primary-color);
  padding-left: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.timeline-item {
  position: relative;
}
.timeline-marker {
  position: absolute;
  left: -1.7rem;
  top: 0.3rem;
  width: 1rem;
  height: 1rem;
  background: var(--text-primary);
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 0 2px var(--border-color);
}
.timeline-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}
.timeline-content .institution {
  color: var(--primary-dark);
  font-size: 1rem;
}
.timeline-content .period {
  color: var(--text-muted);
  font-size: 0.95rem;
}
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}
.skill-category {
  flex: 1 1 220px;
  background: var(--bg-primary);
  border-radius: 0.75rem;
  padding: 1rem 1.2rem;
  box-shadow: var(--shadow-light);
}
.skill-category h3 {
  font-size: 1.1rem;
  color: var(--primary-color);
  margin-bottom: 0.7rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.skill-tag {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 0.5px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.3rem 0.8rem;
  font-size: 0.95rem;
  font-weight: 500;
}
.languages-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.language-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.language-info {
  min-width: 120px;
}
.language-name {
  font-weight: 600;
}
.language-level {
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.language-bar {
  flex: 1;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}
.language-progress {
  height: 100%;
  background: var(--primary-color);
  border-radius: 4px;
}
.interests-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.interest-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  background: var(--bg-primary);
  border-radius: 0.7rem;
  padding: 0.7rem 1.2rem;
  box-shadow: var(--shadow-light);
  font-size: 1rem;
}
.projects-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}
.project-card {
  flex: 1 1 320px;
  background: var(--bg-primary);
  border-radius: 1rem;
  box-shadow: var(--shadow-light);
  padding: 1.5rem 1.2rem;
  min-width: 280px;
  max-width: 400px;
}
.project-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}
.project-badge {
  background: var(--primary-color);
  color: #fff;
  border-radius: 0.5rem;
  padding: 0.2rem 0.7rem;
  font-size: 0.9rem;
  font-weight: 500;
}
.project-description {
  color: var(--text-secondary);
  margin-bottom: 0.7rem;
}
.project-features ul {
  margin: 0.5rem 0 0.7rem 1.2rem;
  color: var(--text-secondary);
  font-size: 0.98rem;
}
.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.project-result {
  color: var(--primary-dark);
  font-size: 0.98rem;
}
.certificates-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}
.certificate-item {
  background: var(--bg-primary);
  border-radius: 0.7rem;
  box-shadow: var(--shadow-light);
  padding: 1rem 1.2rem;
  min-width: 220px;
  max-width: 350px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.certificate-info h3 {
  font-size: 1.05rem;
  font-weight: 600;
}
.certificate-issuer {
  color: var(--primary-dark);
  font-size: 0.98rem;
}
.certificate-date {
  color: var(--text-muted);
  font-size: 0.95rem;
}
.certificate-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  margin-top: 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

@media (max-width: 900px) {
  .about-hero-content {
    flex-direction: column;
    gap: 2rem;
  }
  .about-hero-image img {
    max-width: 220px;
    height: 220px;
  }
  .about-hero-text {
    max-width: 100%;
  }
  .projects-grid,
  .certificates-grid,
  .skills-grid {
    flex-direction: column;
    gap: 1.5rem;
  }
}

/* ==========================================================================
   3D Portfolio Styles & Utilities
   ========================================================================== */

/* 3D Canvas Background */
.hero-3d-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
  pointer-events: none; /* Let events fall through to the global listener */
}

/* 3D Holographic Card Base */
.tilt-card {
  transition: transform 0.15s cubic-bezier(0.25, 1, 0.5, 1), box-shadow 0.3s ease;
  transform-style: preserve-3d;
  will-change: transform;
  position: relative;
}

/* Glowing lens flare reflection shine overlay */
.tilt-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--shine-x, 50%) var(--shine-y, 50%), rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0) 60%);
  border-radius: inherit;
  z-index: 5;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

[data-theme="light"] .tilt-card::before {
  background: radial-gradient(circle at var(--shine-x, 50%) var(--shine-y, 50%), rgba(0, 0, 0, 0.04) 0%, rgba(0, 0, 0, 0) 60%);
}

.tilt-card:hover::before {
  opacity: 1;
}

/* Ensure contents pop inside tilted elements */
.tilt-card-content {
  transform: translateZ(20px);
  transform-style: preserve-3d;
}

/* Holographic styling specifically for hero image container */
.image-container.tilt-card {
  box-shadow: var(--shadow-heavy);
  transform-style: preserve-3d;
  background: var(--bg-secondary);
}

.image-container.tilt-card .floating-card {
  transform: translateZ(40px);
  transition: transform 0.15s cubic-bezier(0.25, 1, 0.5, 1);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  z-index: 10;
}

[data-theme="dark"] .image-container.tilt-card .floating-card {
  background: rgba(26, 26, 26, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-color: rgba(255, 255, 255, 0.08);
}

/* Skills Layout grid splitting for 3D Sphere */
.skills-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--spacing-2xl);
  align-items: center;
  margin-top: var(--spacing-xl);
}

.skills-3d-sphere-container {
  width: 100%;
  height: 400px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.04) 0%, rgba(0, 0, 0, 0) 70%);
  border-radius: var(--radius-xl);
}

[data-theme="light"] .skills-3d-sphere-container {
  background: radial-gradient(circle at center, rgba(26, 26, 26, 0.02) 0%, rgba(0, 0, 0, 0) 70%);
}

#skills-3d-canvas {
  width: 100%;
  height: 100%;
  max-width: 400px;
  max-height: 400px;
  cursor: grab;
}

#skills-3d-canvas:active {
  cursor: grabbing;
}

/* Scroll 3D Section Viewport perspective */
.scroll-3d-section {
  transform-style: preserve-3d;
  perspective: 1200px;
  transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.8s ease;
  will-change: transform, opacity;
}

/* Responsive constraints for Skills sphere split layout */
@media (max-width: 992px) {
  .skills-layout {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }
  
  .skills-3d-sphere-container {
    height: 350px;
    max-width: 350px;
    margin: 0 auto;
  }
}

/* ==========================================================================
   AI Chat Widget Styles
   ========================================================================== */
.portfolio-chat-widget {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column-reverse;
  align-items: flex-end;
  gap: 15px;
}

.chat-widget-toggle {
  width: 55px;
  height: 55px;
  border-radius: 50%;
  background: var(--text-primary);
  color: var(--bg-primary);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: all var(--transition-normal);
  flex-shrink: 0;
}

.chat-widget-toggle:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.chat-widget-toggle.active {
  background: #ef4444;
  color: white;
  transform: rotate(90deg);
}

.chat-iframe-container {
  position: relative;
  width: 350px;
  max-width: calc(100vw - 30px);
  height: 480px;
  max-height: calc(100vh - 170px);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  transform-origin: bottom right;
  transform: translateY(20px) scale(0.9);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  border: 0.5px solid var(--border-color);
  z-index: 10;
}

.chat-iframe-container.active {
  transform: translateY(0) scale(1);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.chat-iframe-container iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: transparent;
}

@media (max-width: 480px) {
  .portfolio-chat-widget {
    bottom: 15px;
    right: 15px;
  }
  .chat-iframe-container {
    position: fixed;
    bottom: 80px;
    left: 15px;
    right: 15px;
    width: auto;
    height: calc(100vh - 150px);
    max-height: 480px;
  }
}