/**
 * Sibghatullah Portfolio - Ubuntu-Inspired Theme
 * =============================================
 * Mobile-first responsive stylesheet
 * 
 * Color Palette (WCAG 2.1 AA compliant):
 * --ubuntu-aubergine: #2c001e (darkest)
 * --ubuntu-purple-dark: #300a24
 * --ubuntu-purple: #77216f
 * --ubuntu-orange: #e95420
 * --ubuntu-orange-light: #f47421
 * --text-light: #ffffff
 * --text-muted: #d0d0d0
 * --text-dark: #1a1a1a
 * 
 * Breakpoints:
 * - Mobile: < 480px
 * - Tablet: 480px - 767px
 * - Desktop: 768px - 1023px
 * - Large: 1024px+
 */

/* ==========================================================================
   CSS Reset & Base
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  font-family: 'Ubuntu', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

/* ==========================================================================
   CSS Custom Properties (Theme Variables)
   ========================================================================== */

:root {
  /* Ubuntu Color Palette */
  --ubuntu-aubergine: #2c001e;
  --ubuntu-purple-dark: #300a24;
  --ubuntu-purple: #77216f;
  --ubuntu-purple-light: #a03d92;
  --ubuntu-orange: #e95420;
  --ubuntu-orange-light: #f47421;
  --ubuntu-warm-grey: #aea79f;
  
  /* Semantic Colors - Light Theme */
  --bg-primary: #f7f5f3;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-overlay: rgba(44, 0, 30, 0.9);
  
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #6b6b6b;
  --text-inverse: #ffffff;
  
  --accent-primary: #e95420;
  --accent-secondary: #77216f;
  --accent-hover: #c34113;
  
  --border-color: rgba(0, 0, 0, 0.1);
  --border-light: rgba(0, 0, 0, 0.05);
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 8px 30px rgba(233, 84, 32, 0.2);
  
  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Typography Scale */
  --font-xs: 0.75rem;
  --font-sm: 0.875rem;
  --font-base: 1rem;
  --font-lg: 1.125rem;
  --font-xl: 1.25rem;
  --font-2xl: 1.5rem;
  --font-3xl: 2rem;
  --font-4xl: 2.5rem;
  
  /* Font Families */
  --font-sans: 'Ubuntu', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Ubuntu Mono', 'Fira Code', Consolas, monospace;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Layout */
  --container-max: 1100px;
  --header-height: 64px;
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-primary: #2c001e;
  --bg-secondary: #300a24;
  --bg-card: rgba(48, 10, 36, 0.8);
  --bg-glass: rgba(48, 10, 36, 0.85);
  --bg-overlay: rgba(0, 0, 0, 0.9);
  
  --text-primary: #ffffff;
  --text-secondary: #e0e0e0;
  --text-muted: #b0b0b0;
  --text-inverse: #1a1a1a;
  
  --border-color: rgba(255, 255, 255, 0.1);
  --border-light: rgba(255, 255, 255, 0.05);
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.4);
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

/* Skip Link */
.skip-link {
  position: fixed;
  top: -100%;
  left: var(--space-md);
  z-index: 9999;
  padding: var(--space-sm) var(--space-md);
  background: var(--accent-primary);
  color: var(--text-inverse);
  font-weight: 700;
  border-radius: var(--radius-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-md);
  outline: 3px solid var(--accent-secondary);
  outline-offset: 2px;
}

/* Focus States */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--accent-primary);
  outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   Layout
   ========================================================================== */

body {
  background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
  color: var(--text-secondary);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-xl);
  }
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

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

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

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.brand__name {
  font-size: var(--font-lg);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

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

/* Navigation */
.nav {
  display: none;
}

.nav__list {
  display: flex;
  gap: var(--space-lg);
}

.nav__link {
  position: relative;
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-secondary);
  padding: var(--space-sm) 0;
  transition: color var(--transition-fast);
}

.nav__link:hover,
.nav__link--active {
  color: var(--accent-primary);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width var(--transition-base);
}

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

@media (min-width: 768px) {
  .nav {
    display: block;
  }
}

/* Header Controls */
.header__controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Nav Toggle (Hamburger) */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  padding: var(--space-sm);
  background: transparent;
  border: none;
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.nav-toggle__bar + .nav-toggle__bar {
  margin-top: 6px;
}

/* Hamburger Animation */
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
}

/* Mobile Navigation */
.nav-mobile {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: var(--space-xl);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  z-index: 999;
}

.nav-mobile--open {
  transform: translateX(0);
}

.nav-mobile__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.nav-mobile__link {
  display: block;
  font-size: var(--font-xl);
  font-weight: 600;
  color: var(--text-primary);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-light);
  transition: color var(--transition-fast);
}

.nav-mobile__link:hover {
  color: var(--accent-primary);
}

@media (min-width: 768px) {
  .nav-mobile {
    display: none;
  }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.btn:hover {
  background: var(--border-light);
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  border: none;
  box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 35px rgba(233, 84, 32, 0.3);
}

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

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

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

.btn--ghost:hover {
  border-color: var(--text-secondary);
}

.btn--icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn--lg {
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-base);
}

/* Theme Toggle */
.theme-toggle {
  font-size: var(--font-lg);
}

/* Fiverr Badge */
.fiverr-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: #1dbf73;
  color: #ffffff;
  font-size: var(--font-sm);
  font-weight: 700;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.fiverr-badge:hover {
  background: #19a463;
  transform: translateY(-2px);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + var(--space-xl));
  padding-bottom: var(--space-2xl);
}

.hero__grid {
  display: grid;
  gap: var(--space-2xl);
  align-items: center;
}

@media (min-width: 768px) {
  .hero__grid {
    grid-template-columns: 1fr 320px;
    gap: var(--space-3xl);
  }
}

@media (min-width: 1024px) {
  .hero__grid {
    grid-template-columns: 1fr 380px;
  }
}

/* Hero Intro */
.hero__intro {
  order: 2;
}

@media (min-width: 768px) {
  .hero__intro {
    order: 1;
  }
}

.hero__greeting {
  font-size: var(--font-base);
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.hero__title {
  font-size: var(--font-3xl);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}

@media (min-width: 768px) {
  .hero__title {
    font-size: var(--font-4xl);
  }
}

.hero__title-accent {
  color: var(--accent-primary);
}

.hero__typewriter {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-primary);
  background: rgba(0, 0, 0, 0.1);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent-secondary);
}

[data-theme="dark"] .hero__typewriter {
  background: rgba(0, 0, 0, 0.3);
}

.hero__tagline {
  font-size: var(--font-base);
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
  max-width: 540px;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.hero__note {
  font-size: var(--font-sm);
  color: var(--text-muted);
  font-style: italic;
}

/* Profile Card */
.profile-card {
  order: 1;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
}

@media (min-width: 768px) {
  .profile-card {
    order: 2;
  }
}

.profile-card__avatar {
  width: 100%;
  max-width: 200px;
  margin: 0 auto var(--space-md);
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--accent-primary);
}

.profile-card__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-card__info {
  text-align: center;
  margin-bottom: var(--space-md);
}

.profile-card__status {
  display: inline-block;
  font-size: var(--font-sm);
  font-weight: 700;
  color: var(--accent-primary);
}

.profile-card__subtitle {
  font-size: var(--font-sm);
  color: var(--text-muted);
}

.profile-card__availability {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  background: linear-gradient(135deg, rgba(233, 84, 32, 0.15), rgba(119, 33, 111, 0.1));
  color: var(--accent-primary);
  font-size: var(--font-xs);
  font-weight: 700;
  border-radius: var(--radius-full);
  margin-top: var(--space-sm);
}

.profile-card__quote {
  font-size: var(--font-sm);
  color: var(--text-muted);
  text-align: center;
  margin-top: var(--space-md);
  font-style: italic;
}

.profile-card__quote span {
  color: var(--accent-secondary);
}

/* ==========================================================================
   Skills Section
   ========================================================================== */

.skills-section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-title {
  font-size: var(--font-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

@media (min-width: 768px) {
  .section-title {
    font-size: var(--font-3xl);
  }
}

.section-subtitle {
  font-size: var(--font-base);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Skill Chips */
.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

.skill-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: linear-gradient(135deg, rgba(233, 84, 32, 0.1), rgba(119, 33, 111, 0.05));
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

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

/* Skills Grid with Progress Bars */
.skills-grid {
  display: grid;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.skill-category {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.skill-category__title {
  font-size: var(--font-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.skill-category__icon {
  font-size: var(--font-xl);
}

.skill-bar {
  margin-bottom: var(--space-md);
}

.skill-bar:last-child {
  margin-bottom: 0;
}

.skill-bar__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xs);
}

.skill-bar__name {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-secondary);
}

.skill-bar__level {
  font-size: var(--font-xs);
  color: var(--text-muted);
}

.skill-bar__track {
  height: 8px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.skill-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-full);
  transition: width 1s ease-out;
}

/* ==========================================================================
   Services Section
   ========================================================================== */

.services-section {
  padding: var(--space-3xl) 0;
  background: var(--bg-secondary);
}

[data-theme="dark"] .services-section {
  background: var(--bg-primary);
}

.services-grid {
  display: grid;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-card__title {
  font-size: var(--font-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.service-card__desc {
  font-size: var(--font-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.service-card__note {
  font-size: var(--font-xs);
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: var(--space-md);
}

/* ==========================================================================
   Projects Section
   ========================================================================== */

.projects-section {
  padding: var(--space-3xl) 0;
}

/* Filter Chips */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  margin-bottom: var(--space-2xl);
}

.filter-chip {
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-chip:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.filter-chip--active {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  border-color: transparent;
}

/* Projects Grid */
.projects-grid {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 480px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Project Card */
.project-card {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  cursor: pointer;
  transition: all var(--transition-base);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.project-card:hover .project-card__image img {
  transform: scale(1.05);
}

.project-card__image {
  position: relative;
  height: 180px;
  overflow: hidden;
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-3xl);
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.7) 100%);
}

.project-card__content {
  padding: var(--space-md);
}

.project-card__title {
  font-size: var(--font-base);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.project-card__desc {
  font-size: var(--font-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.project-card__tag {
  font-size: var(--font-xs);
  padding: 2px 8px;
  background: linear-gradient(135deg, rgba(233, 84, 32, 0.1), rgba(119, 33, 111, 0.05));
  border-radius: var(--radius-full);
  color: var(--text-muted);
}

/* No JS Fallback */
.projects-list {
  display: none;
}

.no-js .projects-grid {
  display: none;
}

.no-js .projects-list {
  display: block;
}

.projects-list__item {
  padding: var(--space-md);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  border: 1px solid var(--border-light);
}

/* ==========================================================================
   Project Modal
   ========================================================================== */

.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal--open {
  opacity: 1;
  visibility: visible;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: var(--bg-overlay);
  cursor: pointer;
}

.modal__content {
  position: relative;
  width: 100%;
  max-width: 700px;
  max-height: 90vh;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transform: translateY(20px) scale(0.95);
  transition: transform var(--transition-base);
}

.modal--open .modal__content {
  transform: translateY(0) scale(1);
}

.modal__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  border: none;
  border-radius: 50%;
  color: #ffffff;
  font-size: var(--font-xl);
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition-fast);
}

.modal__close:hover {
  background: rgba(0, 0, 0, 0.7);
  transform: scale(1.1);
}

.modal__image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

@media (min-width: 768px) {
  .modal__image {
    height: 280px;
  }
}

.modal__body {
  padding: var(--space-lg);
  max-height: calc(90vh - 280px);
  overflow-y: auto;
}

.modal__title {
  font-size: var(--font-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.modal__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  font-size: var(--font-sm);
  color: var(--text-muted);
}

.modal__desc {
  font-size: var(--font-base);
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.modal__section {
  margin-bottom: var(--space-lg);
}

.modal__section-title {
  font-size: var(--font-base);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.modal__tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.modal__tech-item {
  padding: var(--space-xs) var(--space-sm);
  background: linear-gradient(135deg, rgba(233, 84, 32, 0.15), rgba(119, 33, 111, 0.1));
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

.modal__contributions {
  padding-left: var(--space-lg);
}

.modal__contributions li {
  position: relative;
  margin-bottom: var(--space-sm);
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

.modal__contributions li::before {
  content: '→';
  position: absolute;
  left: calc(-1 * var(--space-md));
  color: var(--accent-primary);
}

.modal__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-light);
}

/* ==========================================================================
   About Section
   ========================================================================== */

.about-section {
  padding: var(--space-3xl) 0;
  background: var(--bg-secondary);
}

[data-theme="dark"] .about-section {
  background: var(--bg-primary);
}

.about-grid {
  display: grid;
  gap: var(--space-xl);
  align-items: start;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 280px 1fr;
  }
}

.about-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
}

.about-card__avatar {
  width: 150px;
  height: 150px;
  margin: 0 auto var(--space-md);
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--accent-primary);
}

.about-card__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-card__name {
  font-size: var(--font-lg);
  font-weight: 700;
  color: var(--accent-primary);
}

.about-card__title {
  font-size: var(--font-sm);
  color: var(--text-muted);
}

.about-content__title {
  font-size: var(--font-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.about-content__text {
  font-size: var(--font-base);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

/* Terminal Style Box */
.terminal-box {
  background: var(--ubuntu-purple-dark);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--font-sm);
  color: #ffffff;
  overflow-x: auto;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.3);
  margin-bottom: var(--space-lg);
}

.terminal-box__line {
  margin-bottom: var(--space-xs);
}

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

.terminal-box__output {
  color: var(--ubuntu-warm-grey);
  padding-left: var(--space-md);
}

/* Testimonials */
.testimonials {
  margin-top: var(--space-2xl);
}

.testimonials__title {
  font-size: var(--font-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.testimonials-grid {
  display: grid;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.testimonial-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  border: 1px solid var(--border-light);
}

.testimonial-card__author {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.testimonial-card__text {
  font-size: var(--font-sm);
  color: var(--text-muted);
  font-style: italic;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */

.contact-section {
  padding: var(--space-3xl) 0;
}

.contact-grid {
  display: grid;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Contact Info */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
}

.contact-item__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(233, 84, 32, 0.15), rgba(119, 33, 111, 0.1));
  border-radius: var(--radius-md);
  font-size: var(--font-xl);
  flex-shrink: 0;
}

.contact-item__label {
  font-size: var(--font-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.contact-item__value {
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--text-primary);
}

.contact-item__value a {
  color: var(--accent-primary);
  transition: color var(--transition-fast);
}

.contact-item__value a:hover {
  color: var(--accent-secondary);
}

/* Contact Form */
.contact-form {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid var(--border-light);
}

.contact-form__title {
  font-size: var(--font-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group__label {
  display: block;
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.form-group__input,
.form-group__textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-base);
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-group__input:focus,
.form-group__textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(233, 84, 32, 0.1);
}

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

.form-group__input::placeholder,
.form-group__textarea::placeholder {
  color: var(--text-muted);
}

.form-group__error {
  font-size: var(--font-xs);
  color: #dc3545;
  margin-top: var(--space-xs);
  display: none;
}

.form-group--error .form-group__input,
.form-group--error .form-group__textarea {
  border-color: #dc3545;
}

.form-group--error .form-group__error {
  display: block;
}

.contact-form__success {
  display: none;
  padding: var(--space-md);
  background: rgba(25, 135, 84, 0.1);
  border: 1px solid rgba(25, 135, 84, 0.3);
  border-radius: var(--radius-md);
  color: #198754;
  text-align: center;
  margin-bottom: var(--space-md);
}

.contact-form__success--visible {
  display: block;
}

.contact-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  justify-content: center;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  padding: var(--space-2xl) 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
}

[data-theme="dark"] .footer {
  background: var(--ubuntu-aubergine);
}

.footer__inner {
  text-align: center;
}

.footer__socials {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border-radius: 50%;
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
}

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

.footer__social-link img {
  width: 24px;
  height: 24px;
}

.footer__copyright {
  font-size: var(--font-sm);
  color: var(--text-muted);
}

/* ==========================================================================
   Floating Elements
   ========================================================================== */

/* Floating Tech Icons */
.floating-tech {
  position: fixed;
  left: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  display: none;
  flex-direction: column;
  gap: var(--space-sm);
  z-index: 100;
}

@media (min-width: 1200px) {
  .floating-tech {
    display: flex;
  }
}

.floating-tech__icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base);
}

.floating-tech__icon:hover {
  transform: scale(1.1);
}

/* Availability Badge */
.availability-badge {
  position: fixed;
  right: var(--space-md);
  bottom: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  font-size: var(--font-sm);
  font-weight: 700;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow);
  z-index: 100;
}

/* Chat Demo */
.chat-demo {
  position: fixed;
  right: var(--space-md);
  bottom: 80px;
  width: 320px;
  max-width: calc(100vw - 2rem);
  border-radius: var(--radius-lg);
  background: var(--ubuntu-purple-dark);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--accent-secondary);
  z-index: 200;
  display: none;
}

.chat-demo--open {
  display: block;
}

.chat-demo__header {
  padding: var(--space-sm) var(--space-md);
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  font-family: var(--font-mono);
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-demo__close {
  background: none;
  border: none;
  color: #ffffff;
  font-size: var(--font-lg);
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.chat-demo__body {
  padding: var(--space-md);
  height: 180px;
  overflow-y: auto;
  font-family: var(--font-mono);
}

.chat-demo__msg {
  margin-bottom: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
}

.chat-demo__msg--client {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.chat-demo__msg--me {
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  margin-left: var(--space-lg);
}

.chat-demo__footer {
  padding: var(--space-sm);
  display: flex;
  gap: var(--space-sm);
  background: rgba(0, 0, 0, 0.2);
}

.chat-demo__input {
  flex: 1;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  font-size: var(--font-sm);
}

.chat-demo__input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   Utilities
   ========================================================================== */

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

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

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* ==========================================================================
   Animations
   ========================================================================== */

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

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

.animate-slide-in {
  animation: slideIn 0.6s ease-out forwards;
}

/* Staggered animation delays */
.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }
.animate-delay-5 { animation-delay: 0.5s; }

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
  .header,
  .floating-tech,
  .availability-badge,
  .chat-demo,
  .nav-toggle,
  .nav-mobile {
    display: none !important;
  }
  
  body {
    background: #ffffff;
    color: #000000;
  }
  
  .container {
    max-width: 100%;
  }
  
  a {
    color: #000000;
    text-decoration: underline;
  }
}