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

:root {
  /* Color Palette (Refined Light Theme with Blue Accents) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;     /* Slate 50 */
  --bg-tertiary: #f1f5f9;      /* Slate 100 */
  --color-primary: #0f172a;    /* Slate 900 */
  --color-secondary: #475569;  /* Slate 600 */
  --color-muted: #64748b;      /* Slate 500 */
  
  --accent: #2563eb;           /* Royal Blue */
  --accent-hover: #1d4ed8;     /* Darker Royal Blue */
  --accent-light: #eff6ff;     /* Very Light Blue */
  --accent-soft: rgba(37, 99, 235, 0.08);
  --accent-border: #bfdbfe;    /* Light Blue Border */
  
  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Borders & Shadows */
  --border-color: #e2e8f0;      /* Slate 200 */
  --border-focus: #93c5fd;      /* Light Blue 300 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
  --shadow-hover: 0 20px 25px -5px rgba(37, 99, 235, 0.08), 0 8px 10px -6px rgba(37, 99, 235, 0.05);
  
  /* Transition timings */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);

  /* Layout Header Height */
  --header-height: 80px;
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  background-color: var(--bg-primary);
  color: var(--color-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  font-weight: 600;
  line-height: 1.25;
}

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

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

ul {
  list-style: none;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-muted);
}

/* ==========================================================================
   REUSABLE LAYOUT UTILITIES
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

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

.section-header {
  text-align: center;
  margin-bottom: 60px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-subtitle {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  position: relative;
}

.section-desc {
  color: var(--color-secondary);
  font-size: 1.125rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-normal);
  gap: 8px;
  font-size: 0.95rem;
}

.btn-primary {
  background-color: var(--accent);
  color: white;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-secondary);
  border-color: var(--color-muted);
  transform: translateY(-2px);
}

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

/* Modern Pill Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  background-color: var(--accent-light);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

/* ==========================================================================
   STICKY NAVIGATION
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: var(--transition-normal);
  display: flex;
  align-items: center;
}

.header-scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  height: 70px;
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--color-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent);
  background-color: var(--accent-light);
}

/* Mobile Menu Toggle button */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  margin: 5px 0;
  transition: var(--transition-normal);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: var(--header-height);
  background-color: var(--bg-primary);
  overflow: hidden;
}

/* Grid & Geometric background pattern */
.hero-bg-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(var(--accent-soft) 1.5px, transparent 1.5px),
    radial-gradient(var(--accent-soft) 1.5px, transparent 1.5px);
  background-size: 40px 40px;
  background-position: 0 0, 20px 20px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, #000 60%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, #000 60%, transparent 100%);
  opacity: 0.7;
  pointer-events: none;
  z-index: 1;
}

.hero-glow-1 {
  position: absolute;
  top: 10%;
  right: 15%;
  width: 300px;
  height: 300px;
  border-radius: var(--radius-full);
  background: radial-gradient(circle, rgba(37,99,235,0.12) 0%, rgba(255,255,255,0) 70%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 1;
}

.hero-glow-2 {
  position: absolute;
  bottom: 15%;
  left: 10%;
  width: 350px;
  height: 350px;
  border-radius: var(--radius-full);
  background: radial-gradient(circle, rgba(59,130,246,0.08) 0%, rgba(255,255,255,0) 70%);
  filter: blur(50px);
  pointer-events: none;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero-tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--accent-light);
  border: 1px solid var(--accent-border);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 24px;
  animation: heroTagPulse 2s infinite alternate;
}

@keyframes heroTagPulse {
  0% { transform: scale(1); box-shadow: 0 0 0 rgba(37,99,235,0); }
  100% { transform: scale(1.02); box-shadow: 0 0 10px rgba(37,99,235,0.1); }
}

.hero-title {
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 16px;
  color: var(--color-primary);
}

.hero-subtitle {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-secondary);
  margin-bottom: 24px;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--color-muted);
  max-width: 650px;
  margin: 0 auto 40px auto;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* ==========================================================================
   ABOUT ME SECTION
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.about-text {
  font-size: 1.15rem;
  color: var(--color-secondary);
  line-height: 1.8;
}

.about-text p {
  margin-bottom: 20px;
}

.about-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 32px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background-color: var(--accent);
}

.about-stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.about-stat-num {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.about-stat-label {
  font-size: 0.875rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 32px;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
}

/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.skills-column {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
}

.skills-column:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.skills-col-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--bg-tertiary);
  padding-bottom: 16px;
}

.skills-col-title svg {
  color: var(--accent);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.skill-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-primary);
  transition: var(--transition-bounce);
}

.skill-pill:hover {
  background-color: var(--accent-light);
  border-color: var(--accent-border);
  color: var(--accent);
  transform: scale(1.05);
}

.skill-pill svg {
  color: var(--color-muted);
  transition: var(--transition-fast);
}

.skill-pill:hover svg {
  color: var(--accent);
  transform: rotate(8deg);
}

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.project-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-md);
  position: relative;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-border);
}

.project-icon-wrapper {
  padding: 24px 28px 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.project-folder-icon {
  color: var(--accent);
  background-color: var(--accent-light);
  padding: 10px;
  border-radius: var(--radius-md);
}

.project-links {
  display: flex;
  gap: 12px;
}

.project-icon-link {
  color: var(--color-muted);
  transition: var(--transition-fast);
}

.project-icon-link:hover {
  color: var(--accent);
}

.project-body {
  padding: 24px 28px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.project-title {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.project-card:hover .project-title {
  color: var(--accent);
}

.project-description {
  color: var(--color-secondary);
  font-size: 0.975rem;
  margin-bottom: 24px;
  line-height: 1.6;
  flex-grow: 1;
}

.project-tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.project-tech-tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  background-color: var(--bg-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.project-card:hover .project-tech-tag {
  background-color: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent-border);
}

.project-actions {
  display: flex;
  gap: 12px;
  border-top: 1px solid var(--bg-tertiary);
  padding-top: 20px;
}

.project-btn {
  flex: 1;
  font-size: 0.875rem;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  text-align: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition-normal);
}

.project-btn-primary {
  background-color: var(--accent-light);
  color: var(--accent);
  border: 1px solid transparent;
}

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

.project-btn-secondary {
  background-color: transparent;
  color: var(--color-secondary);
  border: 1px solid var(--border-color);
}

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

/* ==========================================================================
   LEARNING JOURNEY SECTION (TIMELINE)
   ========================================================================== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

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

.timeline-item {
  position: relative;
  padding-left: 80px;
  margin-bottom: 48px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-badge {
  position: absolute;
  top: 2px;
  left: 16px;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background-color: var(--bg-primary);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: var(--transition-normal);
}

.timeline-item:hover .timeline-badge {
  background-color: var(--accent);
  color: white;
  transform: scale(1.1);
  box-shadow: 0 0 0 6px var(--accent-light);
}

.timeline-badge svg {
  color: var(--accent);
  width: 14px;
  height: 14px;
  transition: var(--transition-normal);
}

.timeline-item:hover .timeline-badge svg {
  color: white;
}

.timeline-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 24px 30px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

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

.timeline-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-desc {
  color: var(--color-secondary);
  font-size: 0.95rem;
}

/* ==========================================================================
   EDUCATION SECTION
   ========================================================================== */
.education-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  max-width: 850px;
  margin: 0 auto;
}

.education-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 6px;
  background: linear-gradient(to bottom, var(--accent), #60a5fa);
}

.education-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--bg-tertiary);
  padding-bottom: 24px;
}

.education-info-left {
  display: flex;
  gap: 20px;
  align-items: center;
}

.education-icon {
  background-color: var(--accent-light);
  color: var(--accent);
  padding: 14px;
  border-radius: var(--radius-md);
}

.education-degree {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.education-institute {
  font-size: 1.05rem;
  color: var(--color-secondary);
  font-weight: 500;
}

.education-duration {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  background-color: var(--accent-light);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--accent-border);
}

.education-coursework-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.education-coursework-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.coursework-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-bounce);
}

.coursework-item:hover {
  background-color: var(--bg-primary);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-sm);
  color: var(--accent);
  transform: translateY(-2px);
}

.coursework-item svg {
  color: var(--accent);
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 50px;
  align-items: flex-start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-info-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.contact-info-desc {
  color: var(--color-secondary);
  margin-bottom: 16px;
}

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

.contact-method-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.contact-method-card:hover {
  border-color: var(--accent-border);
  background-color: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.contact-method-icon {
  background-color: var(--bg-secondary);
  color: var(--color-muted);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-normal);
}

.contact-method-card:hover .contact-method-icon {
  background-color: var(--bg-primary);
  color: var(--accent);
}

.contact-method-details h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  margin-bottom: 2px;
}

.contact-method-details p, .contact-method-details a {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
}

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

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

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

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-secondary);
}

.form-control {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--color-primary);
  transition: var(--transition-normal);
  outline: none;
}

.form-control:focus {
  background-color: var(--bg-primary);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.form-status {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.925rem;
  font-weight: 500;
  display: none;
  animation: fadeIn 0.4s ease;
}

.form-status.success {
  background-color: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
  display: block;
}

.form-status.error {
  background-color: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
  display: block;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background-color: var(--color-primary);
  color: white;
  padding: 60px 0;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
}

.footer-quote {
  font-size: 1.15rem;
  color: #94a3b8; /* Slate 400 */
  font-style: italic;
  max-width: 500px;
  line-height: 1.6;
}

.footer-socials {
  display: flex;
  gap: 16px;
}

.footer-social-link {
  color: #94a3b8;
  background-color: rgba(255, 255, 255, 0.05);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-bounce);
}

.footer-social-link:hover {
  color: white;
  background-color: var(--accent);
  transform: translateY(-4px);
}

.footer-divider {
  width: 100%;
  max-width: 600px;
  height: 1px;
  background-color: rgba(255, 255, 255, 0.1);
  margin: 12px 0;
}

.footer-copyright {
  font-size: 0.875rem;
  color: #64748b; /* Slate 500 */
}

/* ==========================================================================
   ENTRANCE ANIMATIONS & EFFECTS
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3.25rem;
  }
  .about-grid, .contact-grid {
    gap: 40px;
  }
  .projects-grid {
    gap: 24px;
  }
}

@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  .about-card {
    max-width: 500px;
    margin: 0 auto;
    width: 100%;
  }
  .skills-grid {
    grid-template-columns: 1fr;
  }
  .projects-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin: 0 auto;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }
  
  .section {
    padding: 70px 0;
  }
  
  .hero {
    min-height: 80vh;
    padding-top: calc(var(--header-height) + 20px);
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.35rem;
  }
  
  .hero-description {
    font-size: 1.05rem;
  }
  
  .section-title {
    font-size: 1.85rem;
  }
  
  /* Mobile Menu navigation logic */
  .nav-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-normal);
  }
  
  .nav-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  
  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
  
  /* Timeline adjustment */
  .timeline::before {
    left: 21px;
  }
  .timeline-item {
    padding-left: 55px;
  }
  .timeline-badge {
    left: 6px;
  }
  
  /* Education card coursework responsive layout */
  .education-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .education-coursework-grid {
    grid-template-columns: 1fr;
  }
  .education-card {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.15rem;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .contact-form-card {
    padding: 24px;
  }
}