/* ==========================================================================
   Sankalpa Athukorala - Modern SRE, Cloud & DevOps Portfolio Design System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* --- CSS Variables & Color Themes --- */
:root {
  /* Dark Theme (Default) - Sleek Cloud & SRE Slate / Cyan / Indigo */
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(56, 189, 248, 0.4);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-primary: #38bdf8;       /* Azure Sky Blue */
  --accent-secondary: #6366f1;     /* Indigo / DevOps */
  --accent-tertiary: #10b981;      /* Emerald / Healthy Status */
  --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #6366f1 50%, #818cf8 100%);
  --accent-gradient-glow: 0 0 25px rgba(56, 189, 248, 0.3);
  
  --badge-bg: rgba(56, 189, 248, 0.1);
  --badge-text: #7dd3fc;
  --badge-border: rgba(56, 189, 248, 0.25);

  --sre-badge-bg: rgba(16, 185, 129, 0.12);
  --sre-badge-text: #34d399;
  --sre-badge-border: rgba(16, 185, 129, 0.25);
  
  --nav-bg: rgba(9, 13, 22, 0.85);
  --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 45px rgba(0, 0, 0, 0.55);

  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --transition-fast: 0.2s 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);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-border-hover: rgba(14, 165, 233, 0.5);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent-primary: #0284c7;
  --accent-secondary: #4f46e5;
  --accent-tertiary: #059669;
  --accent-gradient: linear-gradient(135deg, #0284c7 0%, #4f46e5 100%);
  --accent-gradient-glow: 0 0 20px rgba(2, 132, 199, 0.2);
  
  --badge-bg: rgba(2, 132, 199, 0.08);
  --badge-text: #0369a1;
  --badge-border: rgba(2, 132, 199, 0.2);

  --sre-badge-bg: rgba(5, 150, 105, 0.08);
  --sre-badge-text: #065f46;
  --sre-badge-border: rgba(5, 150, 105, 0.2);
  
  --nav-bg: rgba(248, 250, 252, 0.88);
  --shadow-sm: 0 4px 15px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
}

/* --- Base & Reset --- */
*, *::before, *::after {
  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);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  min-height: 100vh;
}

/* Background Ambient Glow Orbs */
.bg-glow-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #38bdf8 0%, rgba(56, 189, 248, 0) 70%);
  top: -120px;
  left: -120px;
}

.orb-2 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #6366f1 0%, rgba(99, 102, 241, 0) 70%);
  bottom: 5%;
  right: -150px;
  animation-delay: -6s;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #10b981 0%, rgba(16, 185, 129, 0) 70%);
  top: 45%;
  left: 25%;
  animation-delay: -10s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 60px) scale(1.08); }
  100% { transform: translate(-30px, -40px) scale(0.95); }
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

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

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

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

/* --- Container & Section Layout --- */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2.1rem, 4.2vw, 2.85rem);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.1rem;
  max-width: 680px;
  margin: 0 auto;
  color: var(--text-secondary);
}

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

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
}

.brand-logo-img {
  height: 42px;
  width: 42px;
  object-fit: contain;
  border-radius: 12px;
  filter: drop-shadow(0 2px 10px rgba(56, 189, 248, 0.45));
  transition: transform var(--transition-normal);
}

.nav-brand:hover .brand-logo-img {
  transform: scale(1.08) rotate(3deg);
}

.nav-brand span {
  color: var(--accent-primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 24px;
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.92rem;
  position: relative;
  padding: 6px 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: var(--accent-gradient);
  border-radius: 2px;
  transition: width var(--transition-normal);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* Hamburger button */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1.4rem;
  padding: 6px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.94rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #0f172a;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(56, 189, 248, 0.45);
  color: #0f172a;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  border-radius: 8px;
}

/* --- Hero Section --- */
.hero-section {
  min-height: 100vh;
  padding-top: 135px;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-greeting {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--sre-badge-bg);
  color: var(--sre-badge-text);
  border: 1px solid var(--sre-badge-border);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: clamp(2.6rem, 5.2vw, 4.1rem);
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.hero-role {
  font-size: clamp(1.2rem, 2.4vw, 1.65rem);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.typewriter-text {
  color: var(--accent-primary);
  border-right: 2px solid var(--accent-primary);
  white-space: nowrap;
  animation: blinkCursor 0.8s infinite;
}

@keyframes blinkCursor {
  0%, 100% { border-color: transparent; }
  50% { border-color: var(--accent-primary); }
}

.hero-tags-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.hero-tag {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.hero-bio {
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 30px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}

.hero-socials {
  display: flex;
  align-items: center;
  gap: 14px;
}

.social-icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.social-icon-btn:hover {
  color: #0f172a;
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-4px);
  box-shadow: var(--accent-gradient-glow);
}

/* Hero Avatar Card */
.hero-image-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.avatar-card {
  position: relative;
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1 / 1.15;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 28px;
  padding: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.avatar-card:hover {
  transform: translateY(-6px);
  border-color: var(--glass-border-hover);
}

.avatar-backdrop {
  position: absolute;
  top: 8%;
  width: 85%;
  height: 85%;
  background: var(--accent-gradient);
  border-radius: 50%;
  filter: blur(45px);
  opacity: 0.35;
  z-index: 1;
}

.avatar-img {
  position: relative;
  z-index: 2;
  width: 90%;
  height: auto;
  max-height: 95%;
  object-fit: contain;
  filter: drop-shadow(0 15px 25px rgba(0, 0, 0, 0.45));
  transition: transform var(--transition-normal);
}

.avatar-card:hover .avatar-img {
  transform: scale(1.03);
}

.floating-badge {
  position: absolute;
  z-index: 3;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  padding: 10px 16px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-md);
  font-size: 0.84rem;
  font-weight: 600;
}

.badge-top-right {
  top: 20px;
  right: -10px;
  animation: floatBadge 4s ease-in-out infinite alternate;
}

.badge-bottom-left {
  bottom: 24px;
  left: -10px;
  animation: floatBadge 4s ease-in-out infinite alternate -2s;
}

@keyframes floatBadge {
  0% { transform: translateY(0); }
  100% { transform: translateY(-10px); }
}

/* --- Stats Counters Banner --- */
.stats-counter-banner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 50px;
}

.stat-box {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  padding: 24px 20px;
  border-radius: 18px;
  text-align: center;
  transition: all var(--transition-normal);
}

.stat-box:hover {
  transform: translateY(-4px);
  border-color: var(--glass-border-hover);
}

.stat-box .stat-num {
  font-size: 2.3rem;
  font-weight: 800;
  font-family: var(--font-heading);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 4px;
}

.stat-box .stat-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* --- Experience Section --- */
.experience-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.experience-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  padding: 34px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.experience-card:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 18px;
}

.exp-role-title {
  font-size: 1.4rem;
  margin-bottom: 4px;
}

.exp-company {
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.exp-duration-badge {
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
}

.exp-responsibilities {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
}

.exp-responsibilities li {
  position: relative;
  padding-left: 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.exp-responsibilities li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: bold;
}

.exp-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* --- Projects Section --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 30px;
}

.project-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--glass-border-hover);
  box-shadow: var(--shadow-lg), var(--accent-gradient-glow);
}

.project-card.featured-card {
  border-color: rgba(56, 189, 248, 0.35);
}

.project-thumbnail {
  position: relative;
  width: 100%;
  height: 190px;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-thumbnail-icon {
  font-size: 3.6rem;
  color: var(--accent-primary);
  opacity: 0.85;
  transition: transform var(--transition-normal);
}

.project-card:hover .project-thumbnail-icon {
  transform: scale(1.15) rotate(4deg);
}

.project-badge-tag {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(9, 13, 22, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--badge-text);
}

.project-body {
  padding: 26px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-category-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.project-title {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.project-desc {
  font-size: 0.93rem;
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
}

/* Architecture Flow Snippet inside Card */
.project-arch-flow {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--badge-text);
  margin-bottom: 18px;
  line-height: 1.5;
}

.project-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 22px;
}

.tech-pill {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
}

.project-links {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--glass-border);
}

/* --- Skills Section --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.skill-category-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 26px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.skill-category-card:hover {
  transform: translateY(-6px);
  border-color: var(--glass-border-hover);
  box-shadow: var(--shadow-lg);
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.skill-cat-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--badge-bg);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.skill-category-title {
  font-size: 1.15rem;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.skill-tag {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 7px 13px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  background: var(--badge-bg);
  color: var(--badge-text);
  border-color: var(--badge-border);
  transform: translateY(-2px);
}

/* --- Certifications Grid --- */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.cert-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all var(--transition-normal);
}

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

.cert-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--badge-bg);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.cert-info h4 {
  font-size: 1.08rem;
  margin-bottom: 4px;
}

.cert-info p {
  font-size: 0.88rem;
  margin-bottom: 8px;
}

.cert-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--sre-badge-bg);
  color: var(--sre-badge-text);
}

.cert-badge.learning {
  background: rgba(234, 179, 8, 0.12);
  color: #facc15;
  border: 1px solid rgba(234, 179, 8, 0.25);
}

/* --- Timeline / Education Section --- */
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding: 20px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 24px;
  width: 2px;
  background: var(--glass-border);
}

.timeline-item {
  position: relative;
  padding-left: 64px;
  margin-bottom: 40px;
}

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

.timeline-dot {
  position: absolute;
  left: 17px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 10px var(--accent-primary);
}

.timeline-content {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.timeline-content:hover {
  transform: translateX(6px);
  border-color: var(--glass-border-hover);
}

.timeline-date {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-primary);
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.timeline-title {
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.timeline-institution {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 12px;
}

.timeline-details {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* --- Contact Section --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: flex-start;
}

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 22px;
  display: flex;
  align-items: center;
  gap: 18px;
  transition: all var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-4px);
  border-color: var(--glass-border-hover);
  background: var(--bg-card-hover);
}

.contact-card-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background: var(--badge-bg);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

.contact-card-info h4 {
  font-size: 1.05rem;
  margin-bottom: 2px;
}

.contact-card-info p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.contact-form-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 36px;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

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

.form-status {
  margin-top: 14px;
  font-size: 0.9rem;
  display: none;
}

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

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

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 50px 0 30px;
  background: var(--bg-primary);
  position: relative;
  z-index: 1;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 30px;
}

.footer-brand {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
}

.footer-links {
  display: flex;
  gap: 22px;
  list-style: none;
  flex-wrap: wrap;
}

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

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

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--glass-border);
  padding-top: 24px;
}

/* --- Scroll to Top Button --- */
.scroll-top-btn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--accent-gradient);
  color: #0f172a;
  font-weight: 700;
  border: none;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.35);
}

.scroll-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top-btn:hover {
  transform: translateY(-4px);
}

/* --- Responsive Media Queries --- */
@media (max-width: 992px) {
  .hero-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .hero-image-wrapper {
    order: -1;
    margin-bottom: 20px;
  }

  .avatar-card {
    max-width: 320px;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--glass-border);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-actions .btn {
    display: none;
  }

  .section-title {
    font-size: 2rem;
  }

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

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

  .timeline::before {
    left: 16px;
  }

  .timeline-item {
    padding-left: 48px;
  }

  .timeline-dot {
    left: 9px;
  }
}