/* ==========================================================================
   DESIGN SYSTEM & VARIABLES
   ========================================================================== */

:root {
  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-display: 'Outfit', sans-serif;

  /* Accent Colors (Consistent in both modes) */
  --color-primary: #6366f1;       /* Indigo */
  --color-primary-hover: #4f46e5;
  --color-primary-rgb: 99, 102, 241;
  
  --color-teal: #0d9488;          /* Teal */
  --color-teal-hover: #0f766e;
  --color-teal-rgb: 13, 148, 136;
  
  --color-orange: #f97316;        /* Orange */
  --color-pink: #ec4899;          /* Pink */
  
  /* Shared values */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max-width: 1200px;
}

/* Dark Mode Variables (Default) */
body.dark-mode {
  --bg-primary: #0b0c10;
  --bg-secondary: #121420;
  --bg-tertiary: #191c2b;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  
  --border-color: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --navbar-bg: rgba(11, 12, 16, 0.85);
  
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
  --shadow-inset: inset 0 2px 4px 0 rgba(255, 255, 255, 0.05);

  --illustration-card-bg: #ffffff;
  --illustration-card-border: #e2e8f0;
}

/* Light Mode Variables */
body:not(.dark-mode) {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  
  --border-color: rgba(15, 23, 42, 0.08);
  --border-hover: rgba(15, 23, 42, 0.16);
  --navbar-bg: rgba(248, 250, 252, 0.85);
  
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
  --shadow-inset: inset 0 2px 4px 0 rgba(0, 0, 0, 0.01);

  --illustration-card-bg: #1e293b;
  --illustration-card-border: #334155;
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* Selection styling */
::selection {
  background-color: rgba(var(--color-primary-rgb), 0.25);
  color: var(--text-primary);
}

/* ==========================================================================
   REUSABLE UTILITIES & LAYOUTS
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

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

button, input, textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
}

/* Typography & Titles */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.underline {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), #a855f7);
  border-radius: var(--radius-full);
  margin-top: 12px;
}

.section-header {
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(28px, 4vw, 38px);
}

/* Common Section Padding & Nav Scroll Offset */
section {
  padding: 100px 0;
  border-bottom: 1px solid var(--border-color);
  scroll-margin-top: 80px; /* Offset to align perfectly under the fixed 80px header */
}

/* Badges */
.badge {
  display: inline-block;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-full);
  background: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  border: 1px solid rgba(var(--color-primary-rgb), 0.2);
  margin-bottom: 20px;
  width: fit-content;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  gap: 10px;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(var(--color-primary-rgb), 0.4);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 6px 20px rgba(var(--color-primary-rgb), 0.6);
}

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

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

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.btn-icon:hover {
  border-color: var(--text-tertiary);
  background-color: var(--bg-tertiary);
}

/* SVG icons size */
.icon-small {
  width: 18px;
  height: 18px;
}

/* ==========================================================================
   HEADER / NAVBAR
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  z-index: 1000;
  background-color: var(--navbar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-accent {
  background: linear-gradient(135deg, var(--color-primary), #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Sun/Moon Toggle styling */
#theme-toggle svg {
  width: 20px;
  height: 20px;
}

body.dark-mode .icon-sun {
  display: block;
}
body.dark-mode .icon-moon {
  display: none;
}
body:not(.dark-mode) .icon-sun {
  display: none;
}
body:not(.dark-mode) .icon-moon {
  display: block;
}

.mobile-menu-btn {
  display: none;
}

.mobile-menu-btn .icon-close {
  display: none;
}

.mobile-menu-btn[aria-expanded="true"] .icon-menu {
  display: none;
}

.mobile-menu-btn[aria-expanded="true"] .icon-close {
  display: block;
}

/* ==========================================================================
   MOBILE NAVIGATION DRAWER
   ========================================================================== */

.mobile-nav-drawer {
  position: fixed;
  top: 80px;
  left: 0;
  width: 100%;
  height: calc(100vh - 80px);
  background-color: var(--bg-primary);
  z-index: 999;
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
  padding: 40px 24px;
  border-top: 1px solid var(--border-color);
  overflow-y: auto;
}

.mobile-nav-drawer.open {
  transform: translateX(0);
}

.mobile-links {
  display: flex;
  flex-direction: column;
  list-style: none;
  gap: 24px;
}

.mobile-link {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--text-secondary);
}

.mobile-link:hover {
  color: var(--text-primary);
  padding-left: 8px;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */

.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  padding-bottom: 60px;
  background: radial-gradient(circle at 10% 20%, rgba(var(--color-primary-rgb), 0.03) 0%, transparent 50%),
              radial-gradient(circle at 90% 80%, rgba(var(--color-teal-rgb), 0.02) 0%, transparent 50%);
}

.hero-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
  width: 100%;
}

.hero-title {
  font-size: clamp(32px, 6vw, 64px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(16px, 2.5vw, 18px);
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 540px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

/* Hero Avatar Frame & Photo Styling */
.hero-avatar-frame {
  position: relative;
  width: 360px;
  height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-glow {
  position: absolute;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-teal) 100%);
  filter: blur(40px);
  opacity: 0.35;
  border-radius: var(--radius-full);
  z-index: 1;
  animation: pulseGlow 8s ease-in-out infinite;
}

.avatar-deco-circle {
  position: absolute;
  width: 110%;
  height: 110%;
  border: 2px dashed rgba(var(--color-primary-rgb), 0.3);
  border-radius: var(--radius-full);
  z-index: 2;
  animation: rotateDeco 20s linear infinite;
}

.avatar-image-container {
  position: relative;
  width: 320px;
  height: 320px;
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 6px solid var(--bg-secondary);
  box-shadow: var(--shadow-lg), 0 0 0 2px rgba(var(--color-primary-rgb), 0.1);
  z-index: 3;
  transition: transform var(--transition-normal);
}

.hero-avatar-frame:hover .avatar-image-container {
  transform: scale(1.02);
}

.hero-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 10%; /* Focuses and crops torso/face perfectly */
  transition: transform var(--transition-normal);
}

.hero-avatar-frame:hover .hero-avatar-img {
  transform: scale(1.05);
}

.avatar-tag {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  z-index: 4;
  font-family: var(--font-display);
  font-weight: 700;
  transition: transform var(--transition-normal);
}

.tag-code {
  top: 35px;
  right: -10px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-size: 14px;
  animation: floatTag 6s ease-in-out infinite;
}

.tag-edu {
  bottom: 35px;
  left: -10px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  color: var(--color-teal);
  animation: floatTag 6s ease-in-out infinite 3s;
}

.tag-edu svg {
  width: 20px;
  height: 20px;
}

/* Animations for Hero Visual */
@keyframes rotateDeco {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.35; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.06); }
}

@keyframes floatTag {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text-lead {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.about-text {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.contact-quick {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-quick-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

.contact-quick-item a:hover {
  color: var(--color-primary);
}

.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.about-card-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.about-card-item:hover {
  transform: translateY(-8px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.card-icon.indigo {
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
}

.card-icon.teal {
  background: rgba(13, 148, 136, 0.1);
  color: var(--color-teal);
}

.card-icon.orange {
  background: rgba(249, 115, 22, 0.1);
  color: var(--color-orange);
}

.card-icon.pink {
  background: rgba(236, 72, 153, 0.1);
  color: var(--color-pink);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   EXPERIENCE SECTION
   ========================================================================== */

.exp-tabs-container {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-tertiary);
}

.tab-btn.active {
  color: #ffffff;
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.3);
}

.tab-icon {
  width: 18px;
  height: 18px;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Vertical Timeline */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 20px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 31px;
  top: 0;
  width: 2px;
  height: 100%;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  padding-left: 80px;
}

.timeline-dot {
  position: absolute;
  left: 20px;
  top: 10px;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background-color: var(--bg-primary);
  border: 4px solid var(--color-primary);
  box-shadow: 0 0 0 6px var(--bg-primary);
  z-index: 2;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
  transform: scale(1.25);
  background-color: var(--color-primary);
}

.timeline-date {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.timeline-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.timeline-item:hover .timeline-card {
  transform: translateX(6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.timeline-header {
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

.timeline-role {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.timeline-company {
  display: inline-block;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 15px;
  margin-right: 12px;
}

.timeline-location {
  font-size: 13px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.timeline-bullets {
  list-style: none;
}

.timeline-bullets li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 12px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.timeline-bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
}

/* Custom indicator color for organizations */
#org-content .timeline-dot {
  border-color: var(--color-teal);
}
#org-content .timeline-item:hover .timeline-dot {
  background-color: var(--color-teal);
}
#org-content .timeline-date {
  color: var(--color-teal);
}
#org-content .timeline-bullets li::before {
  background-color: var(--color-teal);
}

/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */

.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.skills-category {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.skills-category-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

.skills-category-header h3 {
  font-size: 22px;
}

.category-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
}

.category-icon.indigo {
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
}

.category-icon.teal {
  background: rgba(13, 148, 136, 0.1);
  color: var(--color-teal);
}

.category-icon svg {
  width: 22px;
  height: 22px;
}

.skills-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
}

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

.skill-level {
  font-size: 12px;
  color: var(--text-tertiary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.skill-bar-bg {
  width: 100%;
  height: 6px;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.5s cubic-bezier(0.1, 1, 0.1, 1);
}

/* Viewport reveal trigger class for progress bar */
body.revealed-all .skill-bar-fill,
.skills-category.revealed .skill-bar-fill {
  transform: scaleX(1);
}

.indigo-fill {
  background: linear-gradient(90deg, var(--color-primary), #a855f7);
}

.teal-fill {
  background: linear-gradient(90deg, var(--color-teal), #06b6d4);
}

/* ==========================================================================
   EDUCATION & CERTIFICATIONS
   ========================================================================== */

.edu-cert-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.column-subtitle {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 28px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
}

/* Education Card */
.edu-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.edu-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
}

.edu-card-badge {
  position: absolute;
  top: 40px;
  right: 40px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-teal);
  background-color: rgba(13, 148, 136, 0.1);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(13, 148, 136, 0.2);
}

.edu-degree {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
  padding-right: 120px;
}

.edu-school {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.edu-duration {
  display: block;
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 24px;
}

.edu-details {
  list-style: none;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
}

.edu-details li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 14px;
  font-size: 14px;
  color: var(--text-secondary);
}

.edu-details li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  border-radius: var(--radius-full);
  background-color: var(--color-teal);
}

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

/* Certifications Column */
.cert-cards-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.cert-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.cert-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
}

.cert-header {
  margin-bottom: 14px;
}

.cert-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.cert-authority {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  margin-right: 12px;
}

.cert-date {
  font-size: 12px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.cert-details {
  list-style: none;
}

.cert-details li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.cert-details li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 4px;
  height: 4px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: start;
}

.contact-subtitle {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-intro {
  color: var(--text-secondary);
  margin-bottom: 36px;
  font-size: 15px;
}

.contact-cards-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-detail-card {
  display: flex;
  align-items: center;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.contact-icon-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background-color: var(--bg-tertiary);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  margin-right: 16px;
  flex-shrink: 0;
}

.contact-icon-box svg {
  width: 20px;
  height: 20px;
}

.contact-card-info {
  display: flex;
  flex-direction: column;
}

.contact-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.contact-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
}

.contact-value:hover {
  color: var(--color-primary);
}

/* Copy to Clipboard Tooltip Button */
.btn-copy {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

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

.copy-icon {
  width: 16px;
  height: 16px;
}

.copy-tooltip {
  position: absolute;
  bottom: 130%;
  right: -5px;
  background-color: var(--text-primary);
  color: var(--bg-primary);
  padding: 4px 8px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
  white-space: nowrap;
  pointer-events: none;
}

.copy-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  right: 15px;
  border-width: 4px;
  border-style: solid;
  border-color: var(--text-primary) transparent transparent transparent;
}

.btn-copy:hover .copy-tooltip {
  opacity: 1;
  visibility: visible;
}

/* Contact Form Container */
.contact-form-container {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
}

.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input, .form-textarea {
  width: 100%;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 14px;
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--color-primary);
  background-color: var(--bg-secondary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.12);
}

.form-textarea {
  resize: vertical;
}

.form-error {
  font-size: 12px;
  color: #ef4444;
  margin-top: 4px;
  display: none;
  font-weight: 500;
}

/* Submission Styling */
.btn-block {
  width: 100%;
  margin-top: 8px;
}

.send-icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.btn:hover .send-icon {
  transform: translate(2px, -2px);
}

/* Invalid inputs styling */
.form-input.invalid, .form-textarea.invalid {
  border-color: #ef4444;
}

.form-input.invalid:focus, .form-textarea.invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 60px 0;
  transition: background-color var(--transition-normal);
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 32px;
}

.footer-brand {
  max-width: 400px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 12px;
}

.footer-bottom {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
  flex-wrap: wrap;
  gap: 20px;
}

.copyright {
  font-size: 13px;
  color: var(--text-tertiary);
}

.scroll-top-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.scroll-top-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-tertiary);
  background-color: var(--bg-secondary);
  transform: translateY(-4px);
}

.scroll-top-btn svg {
  width: 18px;
  height: 18px;
}

/* ==========================================================================
   TOAST SYSTEM (NOTIFICATIONS)
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 2000;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 14px;
  font-weight: 500;
  min-width: 280px;
  transform: translateY(100px);
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.4s ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.toast-success {
  border-left: 4px solid var(--color-teal);
}
.toast-success .toast-icon {
  color: var(--color-teal);
}

.toast-error {
  border-left: 4px solid #ef4444;
}
.toast-error .toast-icon {
  color: #ef4444;
}

/* ==========================================================================
   SCROLL REVEAL ANIMATIONS
   ========================================================================== */

.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 {
  transition-delay: 0.15s;
}

.delay-2 {
  transition-delay: 0.3s;
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

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

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

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

  .hero-stats {
    width: 100%;
    justify-content: center;
  }

  .hero-visual {
    order: -1;
  }

  .hero-avatar-frame {
    width: 300px;
    height: 300px;
    margin: 0 auto;
  }

  .avatar-image-container {
    width: 260px;
    height: 260px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-cards {
    gap: 16px;
  }

  .skills-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .skills-category {
    padding: 28px;
  }

  .edu-cert-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .edu-card {
    padding: 28px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

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

  .mobile-menu-btn {
    display: inline-flex;
  }

  section {
    padding: 80px 0;
  }

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

  .timeline::before {
    left: 21px;
  }

  .timeline-item {
    padding-left: 50px;
  }

  .timeline-dot {
    left: 10px;
    width: 20px;
    height: 20px;
    border-width: 3px;
  }

  .timeline-card {
    padding: 24px;
  }

  .timeline-role {
    font-size: 18px;
  }

  .skills-category {
    padding: 24px;
  }

  .edu-card {
    padding: 24px;
  }

  .edu-card-badge {
    position: static;
    display: inline-block;
    margin-bottom: 16px;
  }

  .edu-degree {
    padding-right: 0;
  }

  .contact-form-container {
    padding: 24px;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-avatar-frame {
    width: 240px;
    height: 240px;
  }

  .avatar-image-container {
    width: 200px;
    height: 200px;
  }

  .hero-ctas {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .hero-ctas .btn {
    width: 100%;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-around;
  }

  .stat-item {
    align-items: center;
  }

  .timeline-card {
    padding: 16px;
  }

  .timeline-item {
    padding-left: 36px;
  }

  .timeline::before {
    left: 17px;
  }

  .timeline-dot {
    left: 8px;
    width: 18px;
    height: 18px;
  }

  .exp-tabs-container {
    flex-direction: column;
    width: 100%;
  }

  .tab-btn {
    width: 100%;
    justify-content: center;
  }

  .contact-detail-card {
    padding: 12px;
  }

  .contact-value {
    font-size: 13px;
  }

  .contact-icon-box {
    margin-right: 10px;
    width: 38px;
    height: 38px;
  }
}