/* ==========================================================================
   Praful Bhoir - .NET Developer Portfolio Stylesheet
   Modern Responsive Glassmorphism Design System with Dark/Light Mode
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties / Theme Variables
   -------------------------------------------------------------------------- */
:root {
  /* Dark Theme Default */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f293d;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-glass-strong: rgba(255, 255, 255, 0.06);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-hover: rgba(56, 189, 248, 0.4);
  --border-focus: #38bdf8;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  --accent-primary: #38bdf8;       /* Tech Cyan */
  --accent-primary-rgb: 56, 189, 248;
  --accent-secondary: #818cf8;     /* .NET Indigo / Purple */
  --accent-secondary-rgb: 129, 140, 248;
  --accent-success: #34d399;       /* Emerald */
  --accent-warning: #fbbf24;       /* Amber */
  --accent-danger: #f87171;        /* Coral */

  --gradient-primary: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --gradient-glow: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, rgba(129, 140, 248, 0.05) 50%, transparent 70%);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 30px rgba(56, 189, 248, 0.2);

  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-code: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --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);

  --nav-height: 72px;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --bg-glass: rgba(0, 0, 0, 0.02);
  --bg-glass-strong: rgba(0, 0, 0, 0.04);
  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-hover: rgba(2, 132, 199, 0.4);
  --border-focus: #0284c7;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #f8fafc;

  --accent-primary: #0284c7;
  --accent-primary-rgb: 2, 132, 199;
  --accent-secondary: #6366f1;
  --accent-secondary-rgb: 99, 102, 241;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;

  --gradient-primary: linear-gradient(135deg, #0284c7 0%, #6366f1 50%, #9333ea 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.8) 100%);
  --gradient-glow: radial-gradient(circle, rgba(2, 132, 199, 0.12) 0%, rgba(99, 102, 241, 0.05) 50%, transparent 70%);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 30px rgba(2, 132, 199, 0.15);
}

/* --------------------------------------------------------------------------
   2. Reset & Global Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Scroll Progress Bar */
.scroll-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--gradient-primary);
  z-index: 1000;
  transition: width 0.1s linear;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

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

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

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

ul {
  list-style: none;
}

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

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

/* Gradient & Highlight Utilities */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

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

/* Glassmorphism Panel */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal);
}

.glass-panel:hover {
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* Section Header */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  margin-bottom: 3.5rem;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: rgba(var(--accent-primary-rgb), 0.1);
  border: 1px solid rgba(var(--accent-primary-rgb), 0.25);
  border-radius: var(--radius-full);
  color: var(--accent-primary);
  font-size: 0.825rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   3. Buttons & Interactive Elements
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(var(--accent-primary-rgb), 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(var(--accent-primary-rgb), 0.5);
  color: #ffffff;
}

.btn-outline {
  background: var(--bg-glass);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-outline:hover {
  background: var(--bg-glass-strong);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-outline-primary {
  background: rgba(var(--accent-primary-rgb), 0.08);
  color: var(--accent-primary);
  border-color: rgba(var(--accent-primary-rgb), 0.35);
}

.btn-outline-primary:hover {
  background: var(--accent-primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-glass {
  background: var(--bg-glass-strong);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

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

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-xs {
  padding: 0.3rem 0.65rem;
  font-size: 0.775rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.9rem 2rem;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* --------------------------------------------------------------------------
   4. Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 900;
  display: flex;
  align-items: center;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

[data-theme="light"] .site-header {
  background: rgba(248, 250, 252, 0.88);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

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

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

.logo-subtext {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-left: 0.4rem;
  padding-left: 0.4rem;
  border-left: 1px solid var(--border-color);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link i {
  font-size: 0.85rem;
  opacity: 0.7;
}

.nav-link:hover {
  color: var(--accent-primary);
  background: var(--bg-glass-strong);
}

.nav-link.active {
  color: var(--accent-primary);
  background: rgba(var(--accent-primary-rgb), 0.1);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-glass-strong);
  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);
}

.theme-toggle-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: rotate(15deg);
}

.theme-icon-sun {
  display: none;
}

.theme-icon-moon {
  display: inline-block;
}

[data-theme="light"] .theme-icon-sun {
  display: inline-block;
  color: #f59e0b;
}

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

/* Mobile Toggle Hamburger */
.mobile-toggle-btn {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 38px;
  height: 38px;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px;
  cursor: pointer;
}

.hamburger-bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.mobile-toggle-btn.active .hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle-btn.active .hamburger-bar:nth-child(2) {
  opacity: 0;
}

.mobile-toggle-btn.active .hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   5. Hero Section & Interactive Code Card
   -------------------------------------------------------------------------- */
.hero-section {
  min-height: 100vh;
  padding-top: calc(var(--nav-height) + 2.5rem);
  padding-bottom: 4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* Background Glow Orbs */
.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
}

.glow-top-left {
  top: 10%;
  left: -5%;
  width: 450px;
  height: 450px;
  background: rgba(56, 189, 248, 0.15);
}

.glow-bottom-right {
  bottom: 10%;
  right: -5%;
  width: 500px;
  height: 500px;
  background: rgba(129, 140, 248, 0.15);
}

.hero-container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1.15rem;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.3);
  border-radius: var(--radius-full);
  color: var(--accent-success);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  width: fit-content;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-success);
  box-shadow: 0 0 10px var(--accent-success);
  animation: pulse-glow 2s infinite ease-in-out;
  flex-shrink: 0;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 0.85rem;
}

.hero-role-wrapper {
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  min-height: 2rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.role-highlight {
  color: var(--accent-primary);
  font-family: var(--font-code);
  font-weight: 700;
  margin-left: 0.4rem;
  border-right: 2px solid var(--accent-primary);
  padding-right: 4px;
  animation: blink-caret 0.85s step-end infinite;
}

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--accent-primary); }
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-description strong {
  color: var(--text-primary);
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-socials {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.socials-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-right: 0.25rem;
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.social-icon:hover {
  background: rgba(var(--accent-primary-rgb), 0.15);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

/* --------------------------------------------------------------------------
   Hero Visual / PrafulDeveloper.cs Code Card
   -------------------------------------------------------------------------- */
.hero-visual {
  width: 100%;
  max-width: 100%;
  display: flex;
  justify-content: center;
}

.code-card {
  width: 100%;
  max-width: 520px;
  background: #0d1322;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 35px rgba(56, 189, 248, 0.12);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
}

[data-theme="light"] .code-card {
  background: #1e293b;
  border-color: rgba(0, 0, 0, 0.15);
}

.code-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 45px rgba(56, 189, 248, 0.2);
}

.code-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background: rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  user-select: none;
}

.window-buttons {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-circle {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.btn-red { background-color: #ff5f56; }
.btn-yellow { background-color: #ffbd2e; }
.btn-green { background-color: #27c93f; }

.code-card-title {
  font-family: var(--font-code);
  font-size: 0.825rem;
  color: #94a3b8;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 500;
}

.code-copy-btn {
  background: transparent;
  border: none;
  color: #64748b;
  cursor: pointer;
  font-size: 0.9rem;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.code-copy-btn:hover {
  color: #38bdf8;
  background: rgba(255, 255, 255, 0.08);
}

.code-card-body {
  padding: 1.15rem 1.25rem;
  font-family: var(--font-code);
  font-size: 0.815rem;
  line-height: 1.62;
  color: #e2e8f0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(56, 189, 248, 0.3) rgba(0, 0, 0, 0.2);
}

.code-card-body::-webkit-scrollbar {
  height: 5px;
}

.code-card-body::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 4px;
}

.code-card-body::-webkit-scrollbar-thumb {
  background: rgba(56, 189, 248, 0.35);
  border-radius: 4px;
}

.code-card-body::-webkit-scrollbar-thumb:hover {
  background: rgba(56, 189, 248, 0.6);
}

/* Syntax Highlighting */
.c-keyword { color: #f472b6; font-weight: 600; }
.c-type { color: #38bdf8; }
.c-string { color: #fbbf24; }
.c-number { color: #34d399; }

.code-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1.25rem;
  background: rgba(0, 0, 0, 0.45);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.78rem;
  color: #94a3b8;
  user-select: none;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: #34d399;
  font-weight: 500;
}

.runtime-badge {
  padding: 0.15rem 0.55rem;
  background: rgba(129, 140, 248, 0.15);
  border: 1px solid rgba(129, 140, 248, 0.3);
  border-radius: var(--radius-sm);
  color: #818cf8;
  font-family: var(--font-code);
  font-weight: 600;
  font-size: 0.75rem;
}

/* Hero Stats Strip */
.hero-stats-container {
  margin-top: 4.5rem;
  position: relative;
  z-index: 1;
}

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

.stat-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(var(--accent-primary-rgb), 0.1);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

.stat-number {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   6. About Section
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
}

.about-bio-card, .about-details-card {
  padding: 2.25rem;
}

.bio-heading {
  font-size: 1.35rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text-primary);
}

.bio-heading i {
  color: var(--accent-primary);
}

.about-bio-card p {
  margin-bottom: 1.1rem;
  font-size: 1rem;
  line-height: 1.7;
}

.about-bio-card p strong {
  color: var(--text-primary);
}

.about-highlights-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.highlight-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.9rem;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-primary);
}

.highlight-pill i {
  color: var(--accent-primary);
}

/* About Details */
.details-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.detail-item {
  display: flex;
  flex-direction: column;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

.detail-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.detail-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.25rem;
}

.detail-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.link-styled {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.link-styled:hover {
  color: var(--accent-secondary);
}

.contact-quick-cta {
  margin-top: 1.5rem;
}

/* --------------------------------------------------------------------------
   7. Skills Section
   -------------------------------------------------------------------------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.skill-category-card {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

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

.icon-purple { background: rgba(129, 140, 248, 0.15); color: #818cf8; }
.icon-blue { background: rgba(56, 189, 248, 0.15); color: #38bdf8; }
.icon-green { background: rgba(52, 211, 153, 0.15); color: #34d399; }
.icon-orange { background: rgba(251, 146, 60, 0.15); color: #fb923c; }
.icon-cyan { background: rgba(6, 182, 212, 0.15); color: #06b6d4; }
.icon-red { background: rgba(248, 113, 113, 0.15); color: #f87171; }

.category-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.85rem;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.skill-tag i {
  color: var(--accent-primary);
  font-size: 0.8rem;
}

.skill-tag:hover {
  background: rgba(var(--accent-primary-rgb), 0.12);
  border-color: rgba(var(--accent-primary-rgb), 0.4);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   8. Experience Timeline (Fixed, Perfectly Centered & Glowing)
   -------------------------------------------------------------------------- */
.timeline-wrapper {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding-left: 3rem; /* 48px */
}

/* Continuous Connecting Vertical Line */
.timeline-wrapper::before {
  content: '';
  position: absolute;
  top: 26px;
  bottom: 26px;
  left: 22.5px;
  width: 3px;
  background: linear-gradient(180deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  box-shadow: 0 0 10px rgba(var(--accent-primary-rgb), 0.4);
  border-radius: 3px;
  z-index: 1;
}

.timeline-item {
  position: relative;
  margin-bottom: 2.75rem;
}

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

/* Timeline Marker Container */
.timeline-marker {
  position: absolute;
  top: 18px;
  left: -3rem;
  width: 48px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  pointer-events: none;
}

/* Timeline Glowing Marker Dot */
.marker-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3.5px solid var(--accent-primary);
  box-shadow: 0 0 12px var(--accent-primary), inset 0 0 6px rgba(var(--accent-primary-rgb), 0.6);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal);
}

.timeline-item:hover .marker-dot {
  transform: scale(1.3);
  border-color: var(--accent-secondary);
  box-shadow: 0 0 20px var(--accent-secondary), inset 0 0 8px rgba(var(--accent-secondary-rgb), 0.8);
  background: var(--bg-secondary);
}

.timeline-content {
  padding: 2rem;
}

.timeline-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.timeline-role {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
}

.timeline-company {
  font-size: 1rem;
  color: var(--accent-primary);
  font-weight: 600;
  margin-top: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.timeline-location {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 0.5rem;
}

.timeline-period-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  background: rgba(var(--accent-secondary-rgb), 0.1);
  border: 1px solid rgba(var(--accent-secondary-rgb), 0.3);
  border-radius: var(--radius-full);
  color: var(--accent-secondary);
  font-size: 0.825rem;
  font-weight: 600;
}

.timeline-summary {
  margin-bottom: 1.25rem;
  font-size: 0.975rem;
  line-height: 1.65;
}

.timeline-duties {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.timeline-duties li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.timeline-duties li i {
  color: var(--accent-primary);
  margin-top: 0.25rem;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.timeline-duties li strong {
  color: var(--text-primary);
}

.timeline-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

.tech-chip {
  padding: 0.25rem 0.65rem;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.775rem;
  font-family: var(--font-code);
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   9. Projects Section
   -------------------------------------------------------------------------- */
.project-filter-container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 2.75rem;
}

.filter-btn {
  padding: 0.55rem 1.25rem;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.filter-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-color-hover);
}

.filter-btn.active {
  background: var(--gradient-primary);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(var(--accent-primary-rgb), 0.35);
}

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

.project-card {
  display: flex;
  flex-direction: column;
  padding: 2rem;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.project-card:hover::before {
  opacity: 1;
}

.project-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.project-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-primary);
  background: rgba(var(--accent-primary-rgb), 0.1);
  border: 1px solid rgba(var(--accent-primary-rgb), 0.25);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
}

.project-year {
  font-size: 0.8rem;
  font-family: var(--font-code);
  color: var(--text-muted);
}

.project-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
  line-height: 1.3;
}

.project-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.project-desc strong {
  color: var(--text-primary);
}

.project-highlights {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  padding: 0.85rem 1rem;
  background: var(--bg-glass-strong);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.highlight-item i {
  color: var(--accent-success);
  font-size: 0.75rem;
}

.project-footer {
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

.project-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.project-tech-tags span {
  padding: 0.2rem 0.6rem;
  background: rgba(var(--accent-secondary-rgb), 0.1);
  border: 1px solid rgba(var(--accent-secondary-rgb), 0.25);
  color: var(--accent-secondary);
  font-family: var(--font-code);
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   10. Education & Certifications
   -------------------------------------------------------------------------- */
.edu-cert-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.credential-card {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 2.25rem;
}

.credential-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  flex-shrink: 0;
}

.cert-icon {
  background: rgba(129, 140, 248, 0.15);
  color: #818cf8;
}

.degree-icon {
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
}

.credential-tag {
  font-size: 0.775rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  margin-bottom: 0.4rem;
}

.credential-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.credential-institution {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.credential-duration {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.credential-score {
  margin-bottom: 0.85rem;
}

.score-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.75rem;
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.3);
  border-radius: var(--radius-sm);
  color: var(--accent-success);
  font-size: 0.825rem;
  font-weight: 700;
}

.credential-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.credential-desc strong {
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   11. Contact Section
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

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

.contact-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem;
}

.contact-card-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

.contact-card-details {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.contact-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.contact-main-text {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  word-break: break-all;
}

.contact-card-actions {
  display: flex;
  gap: 0.5rem;
}

.badge-status {
  display: inline-block;
  font-size: 0.775rem;
  font-weight: 600;
  color: var(--accent-success);
  background: rgba(52, 211, 153, 0.1);
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-sm);
  width: fit-content;
}

/* Contact Form */
.form-container {
  padding: 2.25rem;
}

.form-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.form-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

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

.required-star {
  color: var(--accent-danger);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  pointer-events: none;
}

.form-input, .form-textarea {
  width: 100%;
  padding: 0.8rem 1rem 0.8rem 2.75rem;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all var(--transition-normal);
}

.textarea-wrapper {
  align-items: flex-start;
}

.textarea-wrapper .input-icon {
  top: 1rem;
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--border-focus);
  background: var(--bg-card);
  box-shadow: 0 0 0 3px rgba(var(--accent-primary-rgb), 0.18);
}

.form-error-msg {
  font-size: 0.775rem;
  color: var(--accent-danger);
  display: none;
}

.form-group.has-error .form-input,
.form-group.has-error .form-textarea {
  border-color: var(--accent-danger);
}

.form-group.has-error .form-error-msg {
  display: block;
}

/* --------------------------------------------------------------------------
   12. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem 0;
  margin-top: 4rem;
}

.footer-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-color);
}

.footer-brand {
  max-width: 320px;
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.6rem;
}

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

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.footer-socials {
  display: flex;
  gap: 0.75rem;
}

.footer-socials a {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
}

.footer-socials a:hover {
  background: rgba(var(--accent-primary-rgb), 0.15);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.footer-bottom-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.heart-beat {
  color: #ef4444;
  animation: heart-beat 1.5s infinite;
}

@keyframes heart-beat {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

/* --------------------------------------------------------------------------
   13. Floating Back to Top Button & Toast
   -------------------------------------------------------------------------- */
.back-to-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 16px rgba(var(--accent-primary-rgb), 0.4);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  z-index: 800;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: all var(--transition-normal);
}

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

.back-to-top-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(var(--accent-primary-rgb), 0.6);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 5rem;
  right: 1.5rem;
  z-index: 1050;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
}

.toast {
  padding: 0.85rem 1.25rem;
  background: var(--bg-card-hover);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-lg);
  color: var(--text-primary);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  pointer-events: auto;
  animation: toast-slide-in 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transition: opacity 0.3s, transform 0.3s;
}

.toast-success i {
  color: var(--accent-success);
}

.toast-info i {
  color: var(--accent-primary);
}

@keyframes toast-slide-in {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* --------------------------------------------------------------------------
   14. Animations
   -------------------------------------------------------------------------- */
.animate-fade-in {
  animation: fadeIn 0.8s ease-out forwards;
}

.animate-fade-in-up {
  animation: fadeInUp 0.8s ease-out forwards;
}

.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.45s; }
.delay-4 { animation-delay: 0.6s; }

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   15. Comprehensive Responsive Media Queries
   -------------------------------------------------------------------------- */

/* Large Tablets & Small Laptops (max-width: 1024px) */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero-content {
    align-items: center;
    text-align: center;
  }

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

  .hero-title {
    font-size: 2.8rem;
  }

  .hero-role-wrapper {
    justify-content: center;
  }

  .hero-cta-group {
    justify-content: center;
  }

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

  .hero-visual {
    margin-top: 1rem;
  }

  .code-card {
    max-width: 500px;
    margin: 0 auto;
  }

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

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

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

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

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

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

/* Standard Tablets & Large Phones (max-width: 768px) */
@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .section {
    padding: 3.5rem 0;
  }

  .section-header {
    margin-bottom: 2.5rem;
  }

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

  .hero-section {
    padding-top: calc(var(--nav-height) + 1.5rem);
    padding-bottom: 2.5rem;
  }

  .hero-title {
    font-size: 2.35rem;
  }

  .hero-role-wrapper {
    font-size: 1.2rem;
  }

  .hero-description {
    font-size: 1rem;
    line-height: 1.6;
  }

  .hero-stats-container {
    margin-top: 3rem;
  }

  /* Code Card Adjustments for 768px */
  .code-card {
    max-width: 100%;
  }

  .code-card-header {
    padding: 0.75rem 1rem;
  }

  .code-card-title {
    font-size: 0.78rem;
  }

  .code-card-body {
    padding: 1rem;
    font-size: 0.75rem;
    line-height: 1.55;
  }

  .code-card-footer {
    padding: 0.55rem 1rem;
    font-size: 0.72rem;
  }

  /* Timeline Tablet Optimization */
  .timeline-wrapper {
    padding-left: 2.25rem; /* 36px */
  }

  .timeline-wrapper::before {
    left: 17px;           /* Center is at 18px */
    width: 2px;
    top: 24px;
    bottom: 24px;
  }

  .timeline-marker {
    left: -2.25rem;       /* 36px width */
    width: 36px;
    top: 16px;
    height: 20px;
  }

  .marker-dot {
    width: 15px;
    height: 15px;
    border-width: 3px;
  }

  .timeline-content {
    padding: 1.35rem;
  }

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

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .stat-card {
    padding: 1.15rem;
  }

  .mobile-toggle-btn {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem 1.75rem 1.5rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(-150%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    width: 100%;
  }

  .nav-link {
    width: 100%;
    padding: 0.7rem 1rem;
    font-size: 0.95rem;
  }

  .footer-container {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-bottom-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

/* Small Mobile Screens (max-width: 480px) */
@media (max-width: 480px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .logo-subtext {
    display: none;
  }

  .hero-title {
    font-size: 1.95rem;
  }

  .hero-role-wrapper {
    font-size: 1.05rem;
  }

  .hero-badge {
    font-size: 0.775rem;
    padding: 0.35rem 0.85rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

  /* Code Card Phone Optimization */
  .code-card {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md), 0 0 20px rgba(56, 189, 248, 0.1);
  }

  .code-card-header {
    padding: 0.6rem 0.85rem;
  }

  .window-buttons {
    gap: 4px;
  }

  .btn-circle {
    width: 9px;
    height: 9px;
  }

  .code-card-title {
    font-size: 0.72rem;
  }

  .code-copy-btn {
    font-size: 0.8rem;
  }

  .code-card-body {
    padding: 0.85rem 0.75rem;
    font-size: 0.68rem;
    line-height: 1.5;
  }

  .code-card-footer {
    padding: 0.5rem 0.75rem;
    font-size: 0.68rem;
    gap: 0.5rem;
  }

  .runtime-badge {
    font-size: 0.7rem;
    padding: 0.1rem 0.45rem;
  }

  /* Timeline Phone Optimization */
  .timeline-wrapper {
    padding-left: 2rem; /* 32px */
  }

  .timeline-wrapper::before {
    left: 15px;         /* Center is at 16px */
    width: 2px;
    top: 20px;
    bottom: 20px;
  }

  .timeline-marker {
    left: -2rem;         /* 32px width */
    width: 32px;
    top: 14px;
    height: 18px;
  }

  .marker-dot {
    width: 13px;
    height: 13px;
    border-width: 2.5px;
  }

  .timeline-content {
    padding: 1.15rem;
  }

  .timeline-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .timeline-period-badge {
    align-self: flex-start;
  }

  .about-bio-card, .about-details-card,
  .skill-category-card, .project-card,
  .credential-card, .form-container, .contact-card {
    padding: 1.35rem;
  }

  .credential-card {
    flex-direction: column;
    gap: 1rem;
  }

  .credential-icon {
    width: 44px;
    height: 44px;
    font-size: 1.25rem;
  }

  .back-to-top-btn {
    bottom: 1.25rem;
    right: 1.25rem;
    width: 40px;
    height: 40px;
    font-size: 0.95rem;
  }

  .toast-container {
    right: 1rem;
    left: 1rem;
    top: 4.5rem;
  }

  .toast {
    font-size: 0.825rem;
    padding: 0.7rem 1rem;
  }
}

/* Extra Small Screens (max-width: 360px) */
@media (max-width: 360px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .code-card-body {
    font-size: 0.63rem;
    padding: 0.75rem 0.6rem;
  }

  .btn {
    padding: 0.65rem 1.15rem;
    font-size: 0.875rem;
  }

  .timeline-wrapper {
    padding-left: 1.75rem; /* 28px */
  }

  .timeline-wrapper::before {
    left: 13px;            /* Center is at 14px */
    width: 2px;
  }

  .timeline-marker {
    left: -1.75rem;
    width: 28px;
  }

  .marker-dot {
    width: 12px;
    height: 12px;
  }

  .timeline-content {
    padding: 1rem;
  }
}