/* ==========================================================================
   CSS DESIGN SYSTEM
   ========================================================================== */

:root {
  /* Fonts */
  --font-body: 'Inter', sans-serif;
  --font-title: 'Outfit', sans-serif;
  
  /* Transition durations */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout constraints */
  --container-max-width: 1200px;
  --header-height: 80px;
}

/* Dark Theme Variables (Default) */
.dark-theme {
  --bg-primary: #0b0f19;
  --bg-secondary: #121826;
  --bg-gradient: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 40%),
                 radial-gradient(circle at 90% 80%, rgba(168, 85, 247, 0.05) 0%, transparent 40%);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-primary: #6366f1; /* Indigo */
  --accent-hover: #4f46e5;
  --accent-secondary: #a855f7; /* Purple */
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --border-color: rgba(255, 255, 255, 0.08);
  --card-bg: rgba(18, 24, 38, 0.6);
  --card-hover-bg: rgba(26, 34, 54, 0.8);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
  --pill-bg: rgba(99, 102, 241, 0.1);
  --pill-text: #818cf8;
}

/* Light Theme Variables */
.light-theme {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-gradient: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.04) 0%, transparent 40%),
                 radial-gradient(circle at 90% 80%, rgba(168, 85, 247, 0.04) 0%, transparent 40%);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent-primary: #4f46e5;
  --accent-hover: #4338ca;
  --accent-secondary: #7c3aed;
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --border-color: rgba(15, 23, 42, 0.08);
  --card-bg: rgba(255, 255, 255, 0.8);
  --card-hover-bg: #ffffff;
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
  --pill-bg: rgba(79, 70, 229, 0.08);
  --pill-text: #4f46e5;
}

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

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

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

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

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

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

button, input, textarea {
  font-family: inherit;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  font-weight: 700;
  line-height: 1.25;
}

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

/* ==========================================================================
   COMPONENTS
   ========================================================================== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.6rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.05);
}

.btn-block {
  display: width;
  width: 100%;
}

/* Status Pill */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--pill-bg);
  color: var(--pill-text);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid rgba(99, 102, 241, 0.15);
  margin-bottom: 1.5rem;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #10b981; /* Green */
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(0.9);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
  }
  100% {
    transform: scale(0.9);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

/* Section Headers */
.section-header {
  margin-bottom: 3.5rem;
  text-align: center;
}

.section-tagline {
  font-family: var(--font-title);
  color: var(--accent-primary);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.5rem;
  color: var(--text-primary);
  font-weight: 800;
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color var(--transition-normal);
}

.light-theme .navbar {
  background-color: rgba(248, 250, 252, 0.8);
}

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

.logo {
  font-family: var(--font-title);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

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

.logo-dot {
  color: var(--accent-secondary);
}

.nav-menu {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-cta {
  background: var(--accent-gradient);
  color: #ffffff;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.nav-cta:hover {
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.3);
}

.nav-cta-mobile {
  display: none;
}

/* Theme Toggle Button */
.theme-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
  background-color: rgba(99, 102, 241, 0.05);
}

.icon {
  width: 20px;
  height: 20px;
}

/* Show correct icon according to active theme */
.dark-theme .sun-icon {
  display: none;
}
.dark-theme .moon-icon {
  display: block;
}
.light-theme .sun-icon {
  display: block;
}
.light-theme .moon-icon {
  display: none;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--text-primary);
  border-radius: 4px;
  transition: all var(--transition-normal);
}

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

.hero {
  padding-top: calc(var(--header-height) + 3rem);
  padding-bottom: 5rem;
  position: relative;
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  top: -10%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.08) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 4rem;
  padding-bottom: 3rem;
}

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

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
}

/* Hero Image & Glowing Effects */
.hero-image-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
  animation: floatImage 6s ease-in-out infinite;
}

.hero-image-frame {
  position: relative;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  padding: 6px;
  background: var(--border-color);
  box-shadow: var(--shadow-lg);
  z-index: 1;
}

.hero-avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--bg-primary);
  display: block;
}

.glowing-ring {
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  border-radius: 50%;
  background: var(--accent-gradient);
  z-index: -1;
  filter: blur(15px);
  opacity: 0.65;
  animation: spin 20s linear infinite;
}

.glowing-ring-alt {
  filter: blur(25px);
  opacity: 0.45;
  animation: spin-reverse 15s linear infinite, pulseGlow 4s ease-in-out infinite;
}

/* Animations */
@keyframes floatImage {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-15px);
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes spin-reverse {
  from {
    transform: rotate(360deg);
  }
  to {
    transform: rotate(0deg);
  }
}

@keyframes pulseGlow {
  0%, 100% {
    transform: scale(1);
    opacity: 0.45;
  }
  50% {
    transform: scale(1.08);
    opacity: 0.65;
  }
}

/* Stats Wide Container */
.stats-container {
  border-top: 1px solid var(--border-color);
  padding-top: 3rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.stat-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: 12px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  text-align: center;
}

.stat-card:hover {
  transform: translateY(-5px);
  border-color: rgba(99, 102, 241, 0.3);
}

.stat-number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  font-family: var(--font-title);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ==========================================================================
   ABOUT & SKILLS SECTION
   ========================================================================== */

.about-section {
  padding: 6rem 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.about-info .lead-text {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.about-info .body-text {
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

.about-meta {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.meta-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.meta-icon {
  font-size: 1.25rem;
  background: var(--border-color);
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
}

.meta-item strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
}

.meta-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Skills Board */
.skills-board {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  border-radius: 16px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.skills-board-title {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.skills-categories {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.skills-category h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.tags-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.skill-tag {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.skill-tag.highlight {
  background-color: var(--pill-bg);
  color: var(--pill-text);
  border-color: rgba(99, 102, 241, 0.2);
}

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */

.projects-section {
  padding: 6rem 0;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 280px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-slow), background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-slow);
}

.project-card:hover {
  transform: translateY(-8px);
  background-color: var(--card-hover-bg);
  border-color: rgba(99, 102, 241, 0.25);
  box-shadow: var(--shadow-lg), 0 10px 30px rgba(99, 102, 241, 0.05);
}

.project-category {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-primary);
}

.project-title {
  font-size: 1.4rem;
  margin: 0.75rem 0;
  color: var(--text-primary);
}

.project-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.75rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tags span {
  font-size: 0.8rem;
  background-color: rgba(0, 0, 0, 0.15);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.light-theme .project-tags span {
  background-color: rgba(0, 0, 0, 0.03);
}

/* ==========================================================================
   SERVICES SECTION
   ========================================================================== */

.services-section {
  padding: 6rem 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 2rem;
}

.service-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-5px);
  border-color: rgba(99, 102, 241, 0.25);
}

.service-icon {
  width: 50px;
  height: 50px;
  background-color: var(--pill-bg);
  color: var(--pill-text);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

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

.service-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.service-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ==========================================================================
   TIMELINE SECTION (EDUCATION & CERTIFICATIONS)
   ========================================================================== */

.timeline-section {
  padding: 6rem 0;
}

.timeline-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.timeline-heading {
  font-size: 1.75rem;
  margin-bottom: 2.5rem;
  border-left: 3px solid var(--accent-primary);
  padding-left: 1rem;
}

.timeline-item {
  position: relative;
  padding-left: 2rem;
  border-left: 1px solid var(--border-color);
  padding-bottom: 2.5rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
  border-left: 1px solid transparent;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--bg-primary);
  border: 2px solid var(--accent-primary);
  transition: background-color var(--transition-fast);
}

.timeline-item:hover::before {
  background-color: var(--accent-primary);
}

.timeline-date {
  font-family: var(--font-title);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
  background-color: var(--pill-bg);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 0.5rem;
}

.timeline-badge {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--border-color);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 0.5rem;
}

.timeline-item h4 {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.timeline-org {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.timeline-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

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

.contact-section {
  padding: 6rem 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 5rem;
}

.contact-lead {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-method-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 1.25rem 1.5rem;
  border-radius: 10px;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.contact-method-card:hover {
  border-color: var(--accent-primary);
  transform: translateX(5px);
}

.method-icon {
  font-size: 1.5rem;
}

.contact-method-card strong {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: block;
}

.contact-method-card p {
  font-size: 1.05rem;
  color: var(--text-primary);
}

/* Contact Form */
.contact-form-container {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 3rem;
  border-radius: 16px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.8rem 1rem;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast), outline var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.form-status {
  margin-top: 1rem;
  font-size: 0.9rem;
  text-align: center;
  font-weight: 500;
}

.form-status.success {
  color: #10b981;
}

.form-status.error {
  color: #ef4444;
}

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

.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

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

.footer-copy {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

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

/* ==========================================================================
   REVEAL ON SCROLL INTERACTION
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Hero animations on load */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInVar 0.8s forwards;
}

.delay-1 {
  animation-delay: 0.2s;
}

@keyframes fadeInVar {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@media (max-width: 1024px) {
  :root {
    --header-height: 70px;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  
  .hero-content {
    align-items: center;
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .timeline-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  /* Navigation mobile menu */
  .menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--bg-primary);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 999;
    border-top: 1px solid var(--border-color);
  }
  
  .nav-menu.open {
    transform: translateX(0);
  }
  
  .nav-cta {
    display: none;
  }
  
  .nav-cta-mobile {
    display: block;
    background: var(--accent-gradient);
    color: #ffffff !important;
    padding: 0.8rem 2rem !important;
    border-radius: 8px;
    font-weight: 600;
  }
  
  /* Mobile details */
  .hero-title {
    font-size: 2.25rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .contact-form-container {
    padding: 2rem;
  }
  
  .footer-container {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }

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

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
  }
  
  .hero-stats {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
}