/* ==========================================================================
   DESIGN SYSTEM & VARIABLES
   ========================================================================== */
:root {
  /* Fonts */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --container-max-width: 1200px;
  --header-height: 80px;

  /* Theme: Dark (Default) */
  --bg-primary: #090d16;
  --bg-secondary: rgba(15, 21, 36, 0.65);
  --bg-alt: #131b2e;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-primary: #8b5cf6;       /* Violet */
  --accent-primary-rgb: 139, 92, 246;
  --accent-secondary: #14b8a6;     /* Teal */
  --accent-secondary-rgb: 20, 184, 166;
  --border-color: rgba(255, 255, 255, 0.06);
  --border-color-hover: rgba(255, 255, 255, 0.12);
  --card-bg: rgba(15, 21, 36, 0.7);
  --navbar-bg: rgba(9, 13, 22, 0.8);
  --glow-color: rgba(139, 92, 246, 0.15);
  --shadow-color: rgba(0, 0, 0, 0.5);
  
  --gradient-accent: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  --gradient-glow: linear-gradient(135deg, rgba(139, 92, 246, 0.4) 0%, rgba(20, 184, 166, 0.4) 100%);
}

/* Theme: Light */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: rgba(241, 245, 249, 0.65);
  --bg-alt: #e2e8f0;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent-primary: #4f46e5;       /* Indigo */
  --accent-primary-rgb: 79, 70, 229;
  --accent-secondary: #0d9488;     /* Dark Teal */
  --accent-secondary-rgb: 13, 148, 136;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-hover: rgba(0, 0, 0, 0.16);
  --card-bg: rgba(255, 255, 255, 0.85);
  --navbar-bg: rgba(248, 250, 252, 0.85);
  --glow-color: rgba(79, 70, 229, 0.08);
  --shadow-color: rgba(15, 23, 42, 0.08);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: opacity 0.2s ease-in-out, background-color var(--transition-normal), color var(--transition-normal);
}

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

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

ul {
  list-style: none;
}

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

button {
  cursor: pointer;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-alt);
  border-radius: 5px;
  border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

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

.section-padding {
  padding: 100px 0;
}

.bg-alt {
  background-color: var(--bg-secondary);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

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

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

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 60px auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  transition: all var(--transition-normal);
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(var(--accent-primary-rgb), 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(var(--accent-primary-rgb), 0.5);
}

.btn-secondary {
  border: 2px solid var(--border-color);
  background-color: transparent;
  color: var(--text-primary);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
  background-color: rgba(var(--accent-primary-rgb), 0.05);
  transform: translateY(-2px);
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  color: var(--text-primary);
}

.btn-icon:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* Glassmorphism Cards */
.glass-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(16px);
  border-radius: 24px;
  padding: 30px;
  box-shadow: 0 10px 30px var(--shadow-color);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  border-color: rgba(var(--accent-primary-rgb), 0.25);
  box-shadow: 0 15px 40px rgba(var(--accent-primary-rgb), 0.08), 0 10px 30px var(--shadow-color);
  transform: translateY(-4px);
}

/* ==========================================================================
   HEADER / NAVBAR
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background-color: var(--navbar-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  letter-spacing: -0.03em;
}

.logo-accent {
  color: var(--accent-primary);
  font-weight: 700;
}

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

.nav-menu {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width var(--transition-normal);
  border-radius: 2px;
}

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

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

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

.lang-label {
  font-weight: 700;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

/* Sun/Moon Toggle Icons */
.sun-icon {
  width: 20px;
  height: 20px;
  display: none;
}

.moon-icon {
  width: 20px;
  height: 20px;
  display: block;
}

[data-theme="light"] .sun-icon {
  display: block;
}

[data-theme="light"] .moon-icon {
  display: none;
}

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

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + 40px);
  position: relative;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 15%;
  right: 10%;
  width: 300px;
  height: 300px;
  background: var(--glow-color);
  border-radius: 50%;
  filter: blur(100px);
  z-index: -1;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(var(--accent-secondary-rgb), 0.1);
  border: 1px solid rgba(var(--accent-secondary-rgb), 0.2);
  color: var(--accent-secondary);
  padding: 6px 14px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.8rem;
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-secondary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-secondary);
  animation: pulse 2s infinite;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.typing-text {
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-weight: 700;
}

.typing-cursor {
  color: var(--accent-primary);
  animation: cursor-blink 0.8s infinite;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 600px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-socials {
  display: flex;
  gap: 20px;
}

.social-link {
  color: var(--text-secondary);
  transition: all var(--transition-normal);
}

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

/* Profile Picture Stack */
.hero-image-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  position: relative;
}

.image-wrapper {
  position: relative;
  width: 320px;
  height: 320px;
  border-radius: 30px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  box-shadow: 0 20px 40px var(--shadow-color);
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.image-wrapper:hover .profile-image {
  transform: scale(1.05);
}

.glow-bg {
  position: absolute;
  top: -5px;
  left: -5px;
  right: -5px;
  bottom: -5px;
  background: var(--gradient-glow);
  z-index: -1;
  border-radius: 35px;
  filter: blur(15px);
  opacity: 0.5;
  transition: opacity var(--transition-normal);
}

.image-wrapper:hover + .glow-bg {
  opacity: 0.8;
}

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

.about-content h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.about-content p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.strengths-container {
  margin: 32px 0;
}

.strengths-container h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.strengths-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-strength {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 500;
  transition: all var(--transition-normal);
}

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

.about-actions {
  display: flex;
  gap: 16px;
}

/* Stat Cards */
.about-stats {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.stat-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: 20px;
  display: flex;
  gap: 20px;
  align-items: center;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 12px var(--shadow-color);
}

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

.stat-icon {
  font-size: 2rem;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
}

.stat-info h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

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

/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.skills-category-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 35px;
  border-radius: 24px;
  box-shadow: 0 10px 30px var(--shadow-color);
  transition: all var(--transition-normal);
}

.skills-category-card:hover {
  transform: translateY(-5px);
}

.skills-category-card.advanced {
  border-top: 4px solid var(--accent-primary);
}

.skills-category-card.intermediate {
  border-top: 4px solid var(--accent-secondary);
}

.skills-category-card.basic {
  border-top: 4px solid var(--text-muted);
}

.category-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 30px;
}

.category-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.advanced .category-indicator { background-color: var(--accent-primary); }
.intermediate .category-indicator { background-color: var(--accent-secondary); }
.basic .category-indicator { background-color: var(--text-muted); }

.category-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

.skills-list {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

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

.skill-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  font-weight: 600;
}

.skill-pct {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

.skill-bar {
  height: 6px;
  width: 100%;
  background-color: var(--bg-primary);
  border-radius: 10px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  border-radius: 10px;
  transition: width 1.5s cubic-bezier(0.1, 1, 0.1, 1);
}

.advanced .skill-progress { background: var(--gradient-accent); }
.intermediate .skill-progress { background-color: var(--accent-secondary); }
.basic .skill-progress { background-color: var(--text-muted); }

/* ==========================================================================
   EXPERIENCE SECTION (TIMELINE)
   ========================================================================== */
.timeline {
  position: relative;
  max-width: 850px;
  margin: 0 auto;
  padding: 20px 0;
}

/* Central vertical line */
.timeline::after {
  content: '';
  position: absolute;
  width: 3px;
  background-color: var(--border-color);
  top: 0;
  bottom: 0;
  left: 32px;
  border-radius: 50px;
}

.timeline-item {
  position: relative;
  margin-bottom: 50px;
  padding-left: 80px;
}

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

.timeline-dot {
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--bg-primary);
  border: 4px solid var(--accent-primary);
  left: 24px;
  top: 6px;
  z-index: 2;
  box-shadow: 0 0 0 6px var(--bg-secondary);
  transition: all var(--transition-normal);
}

.timeline-item:hover .timeline-dot {
  background-color: var(--accent-primary);
  transform: scale(1.2);
}

.timeline-date {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent-primary);
  margin-bottom: 8px;
}

.timeline-content {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 30px;
  box-shadow: 0 4px 20px var(--shadow-color);
  transition: all var(--transition-normal);
}

.timeline-item:hover .timeline-content {
  border-color: var(--accent-primary);
  box-shadow: 0 8px 30px var(--shadow-color);
}

.job-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.job-company {
  display: inline-block;
  color: var(--accent-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.job-description {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 0.98rem;
}

.job-bullet-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.job-bullet-list li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 18px;
}

.job-bullet-list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
}

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

.job-tags span {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
  font-family: var(--font-mono);
}

/* ==========================================================================
   CERTIFICATIONS SECTION
   ========================================================================== */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.cert-card {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  height: 100%;
}

.cert-icon-wrapper {
  font-size: 1.8rem;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

.cert-details {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-grow: 1;
}

.cert-name {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.3;
}

.cert-issuer {
  color: var(--accent-secondary);
  font-weight: 600;
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.cert-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 8px;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
  align-self: flex-start;
}

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */
.project-filters {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 24px;
  border-radius: 50px;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-normal);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--gradient-accent);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(var(--accent-primary-rgb), 0.2);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.project-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  box-shadow: 0 10px 24px var(--shadow-color);
  transition: all var(--transition-normal);
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-primary);
  box-shadow: 0 15px 35px rgba(var(--accent-primary-rgb), 0.12), 0 10px 24px var(--shadow-color);
}

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

.project-badge {
  background-color: rgba(var(--accent-primary-rgb), 0.1);
  color: var(--accent-primary);
  border: 1px solid rgba(var(--accent-primary-rgb), 0.2);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.project-card-body {
  padding: 24px;
  flex-grow: 1;
}

.project-card-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.project-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.project-tech span {
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.project-card-footer {
  padding: 0 24px 24px 24px;
  border-top: 1px solid transparent;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--accent-secondary);
}

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

.repo-status {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Project Filter animations */
.project-card.fade-out {
  opacity: 0;
  transform: scale(0.9);
  pointer-events: none;
}

.project-card.hide {
  display: none;
}

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

.contact-info-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 40px;
  border-radius: 24px;
  height: 100%;
}

.contact-info-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.contact-info-intro {
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin-bottom: 35px;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.info-item {
  display: flex;
  gap: 16px;
  align-items: center;
}

a.info-item:hover .info-icon {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

a.info-item:hover .info-val {
  color: var(--accent-primary);
}

.info-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--accent-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
}

.info-text {
  display: flex;
  flex-direction: column;
}

.info-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.info-val {
  font-size: 1rem;
  font-weight: 600;
  transition: color var(--transition-fast);
}

/* Contact Form Card */
.contact-form-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 40px;
  border-radius: 24px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

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

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input, .form-group textarea {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 14px 18px;
  border-radius: 12px;
  transition: all var(--transition-normal);
  font-size: 0.95rem;
}

.form-group input::placeholder, .form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(var(--accent-primary-rgb), 0.1);
}

.send-icon {
  transition: transform var(--transition-normal);
}

.btn:hover .send-icon {
  transform: translate(3px, -2px);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 30px 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.copyright {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

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

/* ==========================================================================
   TOAST / CUSTOM NOTIFICATION
   ========================================================================== */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 10000;
  transition: all var(--transition-normal);
}

.toast.hidden {
  opacity: 0;
  transform: translateY(20px) scale(0.9);
  pointer-events: none;
}

.toast-content {
  background: var(--gradient-accent);
  color: #ffffff;
  padding: 16px 28px;
  border-radius: 50px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
  font-weight: 600;
}

#toast-icon {
  font-size: 1.1rem;
}

/* ==========================================================================
   ANIMATIONS & EFFECTS
   ========================================================================== */
@keyframes cursor-blink {
  50% { opacity: 0; }
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(20, 184, 166, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(20, 184, 166, 0); }
  100% { box-shadow: 0 0 0 0 rgba(20, 184, 166, 0); }
}

/* Scroll Reveal Classes */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.1, 1, 0.1, 1), transform 0.8s cubic-bezier(0.1, 1, 0.1, 1);
}

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

/* ==========================================================================
   MEDIA QUERIES (RESPONSIVENESS)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .about-grid, .hero-grid {
    gap: 40px;
  }
  
  .skills-grid, .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .image-wrapper {
    width: 280px;
    height: 280px;
  }

  /* Mobile Navigation Hamburger Menu */
  .mobile-menu-btn {
    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);
    border-top: 1px solid var(--border-color);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
    z-index: 999;
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  
  .nav-link {
    font-size: 1.25rem;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }
  
  .section-padding {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 2rem;
  }

  .image-wrapper {
    width: 240px;
    height: 240px;
    border-radius: 20px;
  }

  .terminal-card {
    max-width: 100%;
    margin-top: 20px;
  }

  .terminal-input-line input {
    font-size: 16px;
  }

  .terminal-prompt {
    font-size: 14px;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  
  .hero-badge, .hero-ctas, .hero-socials {
    justify-content: center;
  }
  
  .hero-subtitle {
    justify-content: center;
  }
  
  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .about-stats {
    order: -1;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .timeline::after {
    left: 20px;
  }
  
  .timeline-dot {
    left: 12px;
  }
  
  .timeline-item {
    padding-left: 50px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .logo {
    font-size: 1.25rem;
  }
  
  .nav-actions {
    gap: 8px;
  }
  
  .btn-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
  }
  
  .btn-icon svg {
    width: 18px;
    height: 18px;
  }
  
  .lang-label {
    font-size: 0.8rem;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  .cert-card {
    flex-direction: column;
    gap: 12px;
  }

  .project-filters {
    gap: 8px;
    margin-bottom: 30px;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: 0.8rem;
  }
}

/* ==========================================================================
   DYNAMIC BACKGROUND STYLES & ANIMATIONS
   ========================================================================== */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(rgba(var(--accent-primary-rgb), 0.04) 1px, transparent 1px);
  background-size: 30px 30px;
  z-index: -10;
  pointer-events: none;
}
[data-theme="light"] body::before {
  background-image: radial-gradient(rgba(0, 0, 0, 0.02) 1px, transparent 1px);
}

.bg-decoration {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}

.tech-logs-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.35;
  z-index: -4;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}
[data-theme="light"] .tech-logs-canvas {
  opacity: 0.12;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.48;
  mix-blend-mode: screen;
  pointer-events: none;
  z-index: -3;
  transition: background-color var(--transition-normal), opacity var(--transition-normal);
}
[data-theme="light"] .glow-orb {
  opacity: 0.18;
  mix-blend-mode: multiply;
  filter: blur(120px);
}

.orb-1 {
  top: -10%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.45) 0%, rgba(0, 0, 0, 0) 70%);
  animation: float-orb-1 25s infinite alternate ease-in-out;
}

.orb-2 {
  bottom: -10%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.35) 0%, rgba(0, 0, 0, 0) 70%);
  animation: float-orb-2 30s infinite alternate ease-in-out;
}

.orb-3 {
  top: 40%;
  left: 50%;
  width: 35vw;
  height: 35vw;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.3) 0%, rgba(0, 0, 0, 0) 70%);
  animation: float-orb-3 20s infinite alternate ease-in-out;
}

.floating-icons {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  pointer-events: none;
}

.float-icon {
  position: absolute;
  color: var(--text-muted);
  opacity: 0.38;
  transition: opacity var(--transition-normal), color var(--transition-normal);
  filter: drop-shadow(0 0 8px rgba(var(--accent-primary-rgb), 0.15));
}
[data-theme="light"] .float-icon {
  opacity: 0.22;
}
.float-icon:hover {
  opacity: 0.35;
  color: var(--accent-primary);
}

.icon-1 {
  top: 15%;
  left: 8%;
  width: 48px;
  height: 48px;
  animation: float-slow-1 18s infinite ease-in-out;
}
.icon-2 {
  top: 30%;
  right: 12%;
  width: 56px;
  height: 56px;
  animation: float-slow-2 22s infinite ease-in-out;
}
.icon-3 {
  top: 55%;
  left: 10%;
  width: 52px;
  height: 52px;
  animation: float-slow-3 20s infinite ease-in-out;
}
.icon-4 {
  top: 75%;
  right: 8%;
  width: 44px;
  height: 44px;
  animation: float-slow-4 16s infinite ease-in-out;
}
.icon-5 {
  top: 85%;
  left: 15%;
  width: 50px;
  height: 50px;
  animation: float-slow-5 24s infinite ease-in-out;
}
.icon-6 {
  top: 45%;
  right: 20%;
  width: 46px;
  height: 46px;
  animation: float-slow-6 19s infinite ease-in-out;
}

@keyframes float-orb-1 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(8%, 5%) scale(1.1); }
  100% { transform: translate(-5%, 10%) scale(0.9); }
}
@keyframes float-orb-2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-10%, -8%) scale(0.9); }
  100% { transform: translate(5%, -5%) scale(1.1); }
}
@keyframes float-orb-3 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-5%, 10%) scale(1.1); }
  100% { transform: translate(10%, -5%) scale(0.95); }
}

@keyframes float-slow-1 {
  0% { transform: translateY(0) rotate(0deg) scale(1); }
  50% { transform: translateY(-15px) rotate(90deg) scale(1.05); }
  100% { transform: translateY(0) rotate(180deg) scale(1); }
}
@keyframes float-slow-2 {
  0% { transform: translateY(0) rotate(180deg) scale(1); }
  50% { transform: translateY(15px) rotate(90deg) scale(0.95); }
  100% { transform: translateY(0) rotate(0deg) scale(1); }
}
@keyframes float-slow-3 {
  0% { transform: translateY(0) rotate(45deg) scale(0.95); }
  50% { transform: translateY(-20px) rotate(135deg) scale(1.05); }
  100% { transform: translateY(0) rotate(225deg) scale(0.95); }
}
@keyframes float-slow-4 {
  0% { transform: translateY(0) rotate(270deg) scale(1.05); }
  50% { transform: translateY(10px) rotate(180deg) scale(0.95); }
  100% { transform: translateY(0) rotate(90deg) scale(1.05); }
}
@keyframes float-slow-5 {
  0% { transform: translateY(0) rotate(120deg) scale(1); }
  50% { transform: translateY(-12px) rotate(240deg) scale(1.1); }
  100% { transform: translateY(0) rotate(360deg) scale(1); }
}
@keyframes float-slow-6 {
  0% { transform: translateY(0) rotate(0deg) scale(0.9); }
  50% { transform: translateY(18px) rotate(-180deg) scale(1.05); }
  100% { transform: translateY(0) rotate(-360deg) scale(0.9); }
}

/* ==========================================================================
   SCROLL PROGRESS BAR
   ========================================================================== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: var(--gradient-accent);
  z-index: 10001;
  transition: width 0.1s ease-out;
}

/* ==========================================================================
   GEEK INTERACTIVE TERMINAL
   ========================================================================== */
.terminal-card {
  margin-top: 30px;
  width: 100%;
  max-width: 380px;
  border: 1px solid var(--border-color);
  background-color: rgba(9, 13, 22, 0.75);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 15px 30px var(--shadow-color);
  font-family: var(--font-mono);
  text-align: left;
  transition: all var(--transition-normal);
  overflow: hidden;
  align-self: flex-start;
}

[data-theme="light"] .terminal-card {
  background-color: rgba(255, 255, 255, 0.8);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.terminal-dot.red { background-color: #ef4444; }
.terminal-dot.yellow { background-color: #eab308; }
.terminal-dot.green { background-color: #22c55e; }

.terminal-title {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 6px;
  font-weight: 500;
}

.terminal-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 150px;
}

.terminal-output {
  flex-grow: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.8rem;
  padding-right: 4px;
  scrollbar-width: thin;
}

.terminal-output::-webkit-scrollbar {
  width: 4px;
}
.terminal-output::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 2px;
}

.terminal-line {
  margin: 0;
  line-height: 1.4;
  word-break: break-word;
}

.terminal-line.user-input {
  color: var(--accent-secondary);
}

.terminal-line.system {
  color: var(--text-muted);
}

.terminal-line.success {
  color: #10b981;
}

.terminal-line.info {
  color: var(--accent-primary);
}

.terminal-input-line {
  display: flex;
  align-items: center;
  gap: 8px;
  border-top: 1px solid var(--border-color);
  padding-top: 8px;
}

.terminal-prompt {
  color: var(--accent-primary);
  font-size: 0.8rem;
  font-weight: bold;
}

.terminal-input-line input {
  flex-grow: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0;
}

/* ==========================================================================
   MODAL DIALOGS (GENERAL & GLASSMORPHIC)
   ========================================================================== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(9, 13, 22, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

[data-theme="light"] .modal-backdrop {
  background-color: rgba(248, 250, 252, 0.7);
}

.modal-container {
  position: relative;
  width: 90%;
  max-width: 800px;
  max-height: 85vh;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 30px;
  box-shadow: 0 20px 50px var(--shadow-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(1.03);
  transition: transform var(--transition-normal);
  z-index: 2;
}

.modal.hidden .modal-container {
  transform: scale(0.97);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 2rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
  z-index: 10;
}

.modal-close-btn:hover {
  color: var(--accent-primary);
}

/* ==========================================================================
   CERTIFICATE MODAL SPECIFICS
   ========================================================================== */
.cert-modal-container {
  max-width: 950px;
  height: 80vh;
}

.modal-navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-grow: 1;
  gap: 20px;
  margin-top: 15px;
  height: calc(100% - 60px);
}

.modal-nav-btn {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.modal-nav-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background-color: rgba(var(--accent-primary-rgb), 0.05);
}

.cert-modal-body {
  flex-grow: 1;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.cert-iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.cert-modal-fallback {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  text-align: center;
  padding: 30px;
}

.cert-modal-fallback p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.cert-modal-footer {
  margin-top: 15px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#cert-modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

#cert-modal-issuer {
  font-size: 0.88rem;
  color: var(--accent-secondary);
  font-family: var(--font-mono);
}

/* ==========================================================================
   PROJECT MODAL SPECIFICS
   ========================================================================== */
.project-modal-container {
  max-width: 850px;
  max-height: 85vh;
  padding-top: 40px;
}

.project-modal-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
  max-height: calc(85vh - 70px);
  padding-right: 6px;
}

.project-modal-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 15px;
}

.project-modal-header h3 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.project-details-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 30px;
}

.project-details-main {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.project-details-main h4, .project-details-side h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-primary);
  border-left: 3px solid var(--accent-primary);
  padding-left: 10px;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.project-details-main p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.project-details-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
  background-color: rgba(var(--accent-primary-rgb), 0.02);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: 16px;
}

.project-features-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.project-features-list li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 16px;
}

.project-features-list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-secondary);
}

.project-modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 15px;
  margin-top: 10px;
}

/* ==========================================================================
   BACK TO TOP BUTTON
   ========================================================================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  z-index: 999;
  box-shadow: 0 5px 15px var(--shadow-color);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.back-to-top:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-4px);
}

.back-to-top.hidden {
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

/* ==========================================================================
   RESPONSIVE LAYOUT UPGRADES
   ========================================================================== */
@media (max-width: 768px) {
  .modal-container {
    padding: 20px;
    border-radius: 20px;
  }
  .cert-modal-container {
    height: 75vh;
  }
  .modal-navigation {
    gap: 10px;
  }
  .modal-nav-btn {
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
  }
  .project-details-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .project-details-side {
    order: -1;
  }
  .terminal-card {
    max-width: 100%;
    margin-top: 20px;
  }
}