/* ==========================================================================
   Rex Personal Portfolio - Modern Minimalist Stylesheet
   Built with CSS3 Custom Properties (Variables) for Seamless Theme Switching
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Theme Variables & Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Fonts */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  
  /* Transition timings */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  
  /* Layout constraints */
  --container-width: 1100px;
  --header-height: 72px;
  --border-radius-sm: 6px;
  --border-radius-md: 10px;
  --border-radius-lg: 16px;
}

/* Dark Theme (Default) */
[data-theme="dark"] {
  --bg-primary: #0b0f19;        /* Deep obsidian / night background */
  --bg-secondary: #131b2e;      /* Subtle elevated section background */
  --bg-card: #182238;           /* Card background */
  --bg-card-hover: #1f2c4a;     /* Card hover background */
  
  --border-color: #23314d;      /* Slate border */
  --border-light: #2c3e60;
  
  --text-primary: #f8fafc;      /* Pure bright text */
  --text-secondary: #94a3b8;    /* Muted secondary text */
  --text-muted: #64748b;        /* Darker muted text */
  
  --accent: #f59e0b;            /* Warm amber / automotive brass */
  --accent-hover: #d97706;
  --accent-subtle: rgba(245, 158, 11, 0.12);
  --accent-text: #fbbf24;
  
  --badge-bg: #1e293b;
  --badge-text: #cbd5e1;

  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  --header-bg: rgba(11, 15, 25, 0.85);
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #f8fafc;        /* Soft crisp off-white */
  --bg-secondary: #f1f5f9;      /* Light gray section background */
  --bg-card: #ffffff;           /* White card background */
  --bg-card-hover: #fcfcfd;
  
  --border-color: #e2e8f0;      /* Crisp light border */
  --border-light: #cbd5e1;
  
  --text-primary: #0f172a;      /* Deep charcoal text */
  --text-secondary: #475569;    /* Medium slate secondary text */
  --text-muted: #64748b;
  
  --accent: #d97706;            /* Deep warm amber */
  --accent-hover: #b45309;
  --accent-subtle: rgba(217, 119, 6, 0.1);
  --accent-text: #92400e;
  
  --badge-bg: #e2e8f0;
  --badge-text: #334155;

  --card-shadow: 0 4px 18px rgba(15, 23, 42, 0.06);
  --header-bg: rgba(248, 250, 252, 0.88);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  font-size: 16px;
}

/* Accessibility: Skip to Content */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background-color: var(--accent);
  color: #0b0f19;
  padding: 10px 18px;
  font-weight: 700;
  border-radius: var(--border-radius-sm);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 14px;
}

/* Accessible Keyboard Focus Indicators */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

body {
  font-family: var(--font-family-base);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-medium), color var(--transition-medium);
}

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

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

h1, h2, h3, h4 {
  color: var(--text-primary);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

ul {
  list-style: none;
}

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

/* --------------------------------------------------------------------------
   3. Reusable Layout Utilities
   -------------------------------------------------------------------------- */
.container {
  width: 90%;
  max-width: var(--container-width);
  margin: 0 auto;
}

.section {
  padding: 90px 0;
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  margin-bottom: 48px;
  max-width: 720px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 14px;
}

.section-intro {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   4. Buttons & Interactive Controls
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.btn-primary {
  background-color: var(--accent);
  color: #0b0f19;
}

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

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

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

.btn-block {
  width: 100%;
}

.icon-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 42px;
  height: 42px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   5. Site Header & Sticky Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-medium), border-color var(--transition-medium);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background-color: var(--accent);
  color: #0b0f19;
  font-size: 1rem;
  font-weight: 900;
}

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

.nav-list {
  display: flex;
  gap: 24px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent);
  border-radius: 2px;
}

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

/* Mobile hamburger button */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 8px;
}

.hamburger-bar {
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* --------------------------------------------------------------------------
   6. Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  padding: 120px 0 100px;
  background: radial-gradient(circle at top right, var(--accent-subtle) 0%, transparent 60%);
  border-bottom: 1px solid var(--border-color);
}

.hero-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 56px;
}

.hero-content {
  flex: 1 1 580px;
  max-width: 720px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.4rem;
  line-height: 1.15;
  margin-bottom: 20px;
}

.highlight-text {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 680px;
}

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

.hero-image-wrap {
  flex: 0 0 320px;
  display: flex;
  justify-content: center;
}

.profile-card {
  position: relative;
  width: 100%;
  max-width: 320px;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
  border: 2px solid var(--border-light);
  background: var(--bg-card);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-fast);
}

.profile-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
}

.profile-image {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center top;
  display: block;
}

/* --------------------------------------------------------------------------
   7. About Section
   -------------------------------------------------------------------------- */
.about-section {
  background-color: var(--bg-secondary);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.about-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 32px 28px;
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.about-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-light);
}

.about-card h3 {
  font-size: 1.25rem;
  margin-bottom: 14px;
}

/* --------------------------------------------------------------------------
   8. Skills & Expertise Section
   -------------------------------------------------------------------------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.skill-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 36px 30px;
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.skill-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-light);
}

.skill-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

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

.skill-description {
  margin-bottom: 20px;
}

.skill-list {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.skill-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.skill-list li::before {
  content: "•";
  position: absolute;
  left: 4px;
  color: var(--accent);
  font-weight: bold;
}

/* --------------------------------------------------------------------------
   9. Content & Editorial Workflow
   -------------------------------------------------------------------------- */
.editorial-section {
  background-color: var(--bg-secondary);
}

.workflow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 30px 24px;
  box-shadow: var(--card-shadow);
  position: relative;
}

.step-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 12px;
  opacity: 0.9;
}

.step-title {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.step-description {
  font-size: 0.92rem;
}

/* --------------------------------------------------------------------------
   10. Showcase Cards (My Projects & My Work)
   -------------------------------------------------------------------------- */
.sample-notice-banner {
  background-color: var(--accent-subtle);
  border: 1px solid var(--accent);
  color: var(--text-primary);
  border-radius: var(--border-radius-sm);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 36px;
  font-size: 0.95rem;
}

.notice-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.cards-grid,
.projects-grid,
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.showcase-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  display: flex;
  flex-direction: column;
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.showcase-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-light);
}

/* Card Thumbnail & Image Slot */
.card-thumbnail {
  width: 100%;
  height: 190px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Dedicated Website Logo Area */
.project-logo-wrap {
  width: 100%;
  height: 120px;
  background-color: #0b0f19;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px 24px;
  position: relative;
}

[data-theme="light"] .project-logo-wrap {
  background-color: #0f172a; /* Deep contrasting tile so white/colored website logos render sharply in light mode */
}

.project-logo {
  max-width: 190px;
  max-height: 52px;
  width: auto;
  height: auto;
  object-fit: contain;
  transition: transform var(--transition-fast);
}

.showcase-card:hover .project-logo {
  transform: scale(1.05);
}

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

.showcase-card:hover .card-image {
  transform: scale(1.05);
}

/* Article Source Badge */
.article-source-badge {
  align-self: flex-start;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background-color: var(--accent-subtle);
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.thumbnail-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  height: 100%;
  padding: 20px;
  text-align: center;
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
  color: var(--text-muted);
}

.thumbnail-icon {
  font-size: 2.2rem;
  opacity: 0.8;
}

.thumbnail-label {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Card Body Content */
.card-body {
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-status-badge {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
}

.card-category {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 14px;
  line-height: 1.35;
}

.card-summary {
  font-size: 0.92rem;
  margin-bottom: 22px;
  flex-grow: 1;
}

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

.tag {
  background-color: var(--badge-bg);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: 4px;
}

.card-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-top: auto;
}

.card-action-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.card-action-link:hover {
  color: var(--accent-hover);
  transform: translateX(4px);
}

.link-arrow {
  font-size: 1rem;
  line-height: 1;
}

/* --------------------------------------------------------------------------
   11. Professional Services
   -------------------------------------------------------------------------- */
.services-section {
  background-color: var(--bg-secondary);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.service-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 34px 28px;
  box-shadow: var(--card-shadow);
}

.service-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.service-description {
  font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   12. Career Goals Section
   -------------------------------------------------------------------------- */
.goals-wrapper {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.goal-item {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 28px;
  box-shadow: var(--card-shadow);
}

.goal-bullet {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent);
  background-color: var(--accent-subtle);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  flex-shrink: 0;
}

.goal-item h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

/* --------------------------------------------------------------------------
   13. Contact Section & Form Interface
   -------------------------------------------------------------------------- */
.contact-section {
  background-color: var(--bg-secondary);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 40px;
}

.contact-info-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 36px 30px;
  box-shadow: var(--card-shadow);
}

.contact-info-card h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.contact-info-card p {
  margin-bottom: 28px;
}

.info-block {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.info-block:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.info-label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

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

.contact-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast), text-decoration var(--transition-fast);
}

.contact-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.contact-form-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 36px 30px;
  box-shadow: var(--card-shadow);
}

.form-notice {
  background-color: var(--accent-subtle);
  border: 1px solid var(--accent);
  border-radius: var(--border-radius-sm);
  padding: 12px 16px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 24px;
}

.form-notice p {
  font-size: 0.85rem;
  color: var(--text-primary);
}

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

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.form-feedback {
  margin-top: 18px;
  font-size: 0.92rem;
  padding: 12px;
  border-radius: var(--border-radius-sm);
  display: none;
}

.form-feedback.show {
  display: block;
}

.form-feedback.info {
  background-color: var(--accent-subtle);
  border: 1px solid var(--accent);
  color: var(--text-primary);
}

.form-feedback.error {
  background-color: rgba(239, 68, 68, 0.15);
  border: 1px solid #ef4448;
  color: #ef4448;
}

/* --------------------------------------------------------------------------
   14. Site Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--bg-primary);
  padding: 60px 0 40px;
}

.footer-container {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.footer-left {
  max-width: 500px;
}

.footer-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  display: inline-block;
  margin-bottom: 8px;
}

.footer-text {
  font-size: 0.92rem;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

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

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.back-to-top {
  color: var(--accent);
  font-weight: 600;
}

.back-to-top:hover {
  text-decoration: underline;
}

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

/* Tablet Screens (≤ 900px) */
@media (max-width: 900px) {
  .hero-container {
    flex-direction: column-reverse;
    text-align: left;
    gap: 40px;
    align-items: flex-start;
  }

  .hero-image-wrap {
    flex: 0 0 auto;
    width: 100%;
    max-width: 280px;
  }

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

  .about-grid,
  .cards-grid,
  .projects-grid,
  .work-grid,
  .featured-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

/* Mobile Screens (≤ 768px) */
@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }

  .mobile-toggle[aria-expanded="true"] .hamburger-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .mobile-toggle[aria-expanded="true"] .hamburger-bar:nth-child(2) {
    opacity: 0;
  }

  .mobile-toggle[aria-expanded="true"] .hamburger-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 24px;
    display: none;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  }

  .nav-menu.open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    gap: 16px;
  }

  .nav-link {
    font-size: 1.05rem;
    display: inline-block;
  }

  .hero-container {
    gap: 32px;
  }

  .hero-image-wrap {
    max-width: 240px;
  }

  .hero-title {
    font-size: 2.3rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .about-grid,
  .skills-grid,
  .cards-grid,
  .projects-grid,
  .work-grid,
  .featured-grid,
  .services-grid,
  .workflow-steps {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 60px 0;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
}