/* ============================================
   PORTFOLIO CSS - BENHIMA MOHAMMED-TAHA
   ============================================ */

/* ===== CSS VARIABLES ===== */
:root {
  /* Colors - Light Theme */
  --color-primary: #2563eb;
  --color-primary-light: #60a5fa;
  --color-primary-dark: #1d4ed8;
  --color-secondary: #f43f5e;
  --color-accent: #0ea5e9;
  
  --color-text: #1e293b;
  --color-text-light: #475569;
  --color-text-muted: #94a3b8;
  
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-elevated: #ffffff;
  
  --color-border: #e2e8f0;
  --color-shadow: rgba(0, 0, 0, 0.1);
  
  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Inter', system-ui, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Layout */
  --container-max: 1200px;
  --container-padding: var(--space-lg);
  --border-radius: 8px;
  --border-radius-lg: 16px;
  --border-radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-highlight: 0 0 15px rgba(37, 99, 235, 0.3);
}

/* Dark Theme */
[data-theme="dark"] {
  --color-primary: #60a5fa;
  --color-primary-light: #93c5fd;
  --color-primary-dark: #3b82f6;
  --color-secondary: #fb7185;
  
  --color-text: #f1f5f9;
  --color-text-light: #cbd5e1;
  --color-text-muted: #64748b;
  
  --color-bg: #0f172a;
  --color-bg-alt: #1e293b;
  --color-bg-elevated: #1e293b;
  
  --color-border: #334155;
  --color-shadow: rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-text);
  letter-spacing: -0.025em;
}

h1 { font-size: var(--font-size-5xl); margin-bottom: 0.5em; }
h2 { font-size: var(--font-size-3xl); margin-bottom: 0.5em; }
h3 { font-size: var(--font-size-2xl); margin-bottom: 0.5em; }
h4 { font-size: var(--font-size-xl); margin-bottom: 0.5em; }
h5 { font-size: var(--font-size-lg); margin-bottom: 0.5em; }
h6 { font-size: var(--font-size-base); margin-bottom: 0.5em; }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

a:hover, a:focus {
  color: var(--color-primary-dark);
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* ===== SKIP LINK ===== */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: var(--space-sm) var(--space-md);
  z-index: 100;
  border-radius: 0 0 var(--border-radius) 0;
  transition: top 0.3s ease;
  font-weight: var(--font-weight-medium);
}

.skip-to-content:focus {
  top: 0;
  text-decoration: none;
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.5);
}

/* ===== CONTAINER ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 50;
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .header {
  background-color: rgba(15, 23, 42, 0.85);
  border-bottom: 1px solid rgba(51, 65, 85, 0.7);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  transition: all var(--transition-base);
}

.header.scrolled .nav {
  height: 60px;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__logo {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: opacity var(--transition-fast);
}

.nav__logo:hover {
  opacity: 0.85;
  text-decoration: none;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

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

.nav__link {
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  position: relative;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width var(--transition-fast);
  border-radius: var(--border-radius-full);
}

.nav__link:hover, .nav__link:focus {
  color: var(--color-primary);
  text-decoration: none;
}

.nav__link:hover::after, .nav__link:focus::after {
  width: 80%;
}

.nav__toggle {
  display: none;
  width: 28px;
  height: 20px;
  position: relative;
  z-index: 2;
}

.nav__hamburger {
  position: absolute;
  width: 28px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-base);
  top: 50%;
  transform: translateY(-50%);
}

.nav__hamburger::before, .nav__hamburger::after {
  content: '';
  position: absolute;
  width: 28px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-base);
}

.nav__hamburger::before {
  transform: translateY(-8px);
}

.nav__hamburger::after {
  transform: translateY(8px);
}

.nav__toggle[aria-expanded="true"] .nav__hamburger {
  background-color: transparent;
}

.nav__toggle[aria-expanded="true"] .nav__hamburger::before {
  transform: rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__hamburger::after {
  transform: rotate(-45deg);
}

.nav__controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.btn-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  background-color: var(--color-bg-alt);
  transition: all var(--transition-fast);
}

.btn-icon:hover, .btn-icon:focus {
  background-color: var(--color-bg-alt);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

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

.lang-text {
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

/* ===== HERO SECTION ===== */
.hero {
  padding-top: 120px;
  padding-bottom: var(--space-3xl);
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.1), rgba(255, 255, 255, 0) 70%);
  z-index: -1;
}

[data-theme="dark"] .hero::before {
  background: radial-gradient(circle at 50% 0%, rgba(96, 165, 250, 0.1), rgba(15, 23, 42, 0) 70%);
}
.hero__content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
  align-items: center;
  gap: var(--space-3xl);
}

.hero__text {
  flex: 1;
}

.hero__greeting {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  display: block;
}

.hero__name {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  line-height: 1.1;
  animation: fadeInUp 0.8s ease-out forwards;
}

.hero__role {
  font-size: var(--font-size-xl);
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
  font-weight: var(--font-weight-medium);
  animation: fadeInUp 0.8s ease-out 0.2s forwards;
  opacity: 0;
}

.hero__summary {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
  max-width: 600px;
  animation: fadeInUp 0.8s ease-out 0.4s forwards;
  opacity: 0;
  line-height: 1.7;
}

.hero__cta {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.8s ease-out 0.6s forwards;
  opacity: 0;
}

.hero__social {
  display: flex;
  gap: var(--space-md);
  animation: fadeInUp 0.8s ease-out 0.8s forwards;
  opacity: 0;
}

.social-link {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-alt);
  color: var(--color-text);
  transition: all var(--transition-base);
}

.social-link:hover, .social-link:focus {
  background-color: var(--color-primary);
  color: white;
  transform: translateY(-5px);
  box-shadow: var(--shadow-highlight);
}

.hero__image {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  justify-self: center;
  transform: translateX(-32px);
}

.hero__avatar {
  width: min(320px, 90vw);
  position: relative;
  animation: fadeIn 1s ease-out;
}

.hero__avatar::after {
  content: "";
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  border: 2px solid var(--color-primary-light);
  border-radius: var(--border-radius-full);
  opacity: 0.4;
  z-index: -1;
  animation: pulse 3s ease-in-out infinite;
}

.hero__avatar img {
  border-radius: var(--border-radius-full);
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--color-bg);
  background-color: var(--color-bg-alt);
  transition: transform var(--transition-slow);
  animation: float 6s ease-in-out infinite;
}

.hero__avatar img:hover {
  transform: scale(1.05);
}

/* ===== SECTIONS ===== */
.section {
  padding: var(--space-3xl) 0;
  position: relative;
}

.section--elevation {
  background-color: var(--color-bg-alt);
  position: relative;
  z-index: 1;
}

.section__title {
  text-align: center;
  margin-bottom: var(--space-2xl);
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--font-size-3xl);
  color: var(--color-text);
}

.section__title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--border-radius-full);
}

/* ===== ABOUT SECTION ===== */
.about {
  max-width: 900px;
  margin: 0 auto;
}

.about__content {
  background-color: var(--color-bg-elevated);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2xl);
  border: 1px solid var(--color-border);
}

.about__text {
  margin-bottom: var(--space-xl);
  font-size: var(--font-size-lg);
  line-height: 1.8;
  color: var(--color-text-light);
}

.about__details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.detail-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.detail-card .icon--primary {
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 3px;
}

.detail-card__title {
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-base);
}

.detail-card__text {
  color: var(--color-text-light);
  font-size: var(--font-size-base);
}

/* ===== SKILLS SECTION ===== */
.skills {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.skill-category {
  position: relative;
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: var(--space-lg);
  padding: var(--space-xl);
  border-radius: var(--border-radius-lg);
  background: var(--color-bg-elevated);
  border: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.skill-category::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, color-mix(in srgb, var(--color-primary) 25%, transparent) 0%, transparent 65%);
  opacity: 0.6;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.skill-category:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--color-primary) 30%, var(--color-border));
}

.skill-category:hover::before {
  opacity: 1;
}

.skill-category__title {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-xl);
  color: var(--color-text);
}

.skill-category__icon {
  width: 42px;
  height: 42px;
  padding: var(--space-sm);
  border-radius: var(--border-radius);
  background: linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 70%, transparent) 0%, color-mix(in srgb, var(--color-accent) 65%, transparent) 100%);
  color: white;
  box-shadow: var(--shadow-sm);
}

.skill-list {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.skill-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--border-radius-full);
  background: var(--color-bg-alt);
  border: 1px solid color-mix(in srgb, var(--color-border) 80%, transparent);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.skill-chip:hover,
.skill-chip:focus-visible {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  transform: translateY(-2px);
  border-color: transparent;
}

.soft-skills {
  max-width: 820px;
  margin: 0 auto;
}

.subsection__title {
  text-align: center;
  margin-bottom: var(--space-xl);
  font-size: var(--font-size-2xl);
  color: var(--color-text);
}

.soft-skills__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

.soft-skill-item {
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--border-radius-full);
  background: linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 15%, var(--color-bg-elevated) 85%) 0%, color-mix(in srgb, var(--color-accent) 20%, var(--color-bg-elevated) 80%) 100%);
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  border: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.soft-skill-item:hover,
.soft-skill-item:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* ===== EXPERIENCE SECTION ===== */
.timeline {
  max-width: 800px;
  margin: 0 auto;
  padding-left: var(--space-2xl);
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
  border-radius: var(--border-radius-full);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-2xl);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-2xl) - 6px);
  top: var(--space-md);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--color-primary);
  box-shadow: 0 0 0 5px var(--color-bg), 0 0 0 7px rgba(37, 99, 235, 0.3);
  z-index: 1;
}

.timeline-card {
  background-color: var(--color-bg-elevated);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.timeline-card:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-lg);
}

.timeline-card__header {
  margin-bottom: var(--space-md);
}

.timeline-card__title {
  color: var(--color-primary);
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-xs);
}

.timeline-card__company {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.timeline-card__period {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.timeline-card__content {
  color: var(--color-text-light);
}

.timeline-card__content ul {
  list-style-type: disc;
  padding-left: var(--space-lg);
  margin-top: var(--space-md);
}

.timeline-card__content ul li {
  margin-bottom: var(--space-sm);
}

/* ===== PROJECTS SECTION ===== */
.project-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
}

.filter-btn {
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  background-color: var(--color-bg-alt);
  border: 2px solid transparent;
  transition: all var(--transition-fast);
}

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

.filter-btn--active {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary-dark);
}

.filter-btn--active:hover {
  background-color: var(--color-primary-dark);
  color: white;
}

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.project-card {
  background-color: var(--color-bg-elevated);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  display: grid;
  grid-template-rows: auto 1fr auto;
  border: 1px solid var(--color-border);
  position: relative;
}

.project-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 12%, transparent) 0%, color-mix(in srgb, var(--color-accent) 12%, transparent) 100%);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: color-mix(in srgb, var(--color-primary) 25%, var(--color-border));
}

.project-card:hover::before {
  opacity: 0.35;
}

.project-card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg-alt);
}

.project-card__badge {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius-full);
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  backdrop-filter: blur(4px);
}

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

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

.project-card__body {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.project-card__title {
  font-size: var(--font-size-xl);
  color: var(--color-text);
}

.project-card__description {
  color: var(--color-text-light);
  line-height: 1.6;
}

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

.stack-chip {
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius-full);
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.project-card__actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-start;
  padding: 0 var(--space-lg) var(--space-lg);
}

.btn--small {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
  border-radius: var(--border-radius-full);
}

.btn--ghost {
  background-color: transparent;
  border-color: color-mix(in srgb, var(--color-border) 70%, transparent);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background-color: var(--color-bg-alt);
}

.btn--disabled,
.btn--disabled:hover,
.btn--disabled:focus-visible {
  cursor: not-allowed;
  background: color-mix(in srgb, var(--color-bg-alt) 90%, transparent);
  color: var(--color-text-muted);
  border-color: color-mix(in srgb, var(--color-border) 80%, transparent);
  box-shadow: none;
  transform: none;
}

/* ===== EDUCATION SECTION ===== */
.education {
  max-width: 800px;
  margin: 0 auto;
}

.education-card {
  background-color: var(--color-bg-elevated);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.education-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.education-card:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-lg);
}

.education-card__header {
  margin-bottom: var(--space-md);
}

.education-card__school {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.education-card__degree {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.education-card__period {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.education-card__content {
  color: var(--color-text-light);
}

/* ===== CONTACT SECTION ===== */
.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  max-width: 1000px;
  margin: 0 auto;
}

.contact__info {
  padding: var(--space-xl);
}

.contact__text {
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
  font-size: var(--font-size-lg);
  line-height: 1.7;
}

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

.contact__link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-bg-elevated);
  border-radius: var(--border-radius-lg);
  color: var(--color-text);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.contact__link .icon {
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact__link:hover, .contact__link:focus {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  color: var(--color-text);
  border-color: var(--color-primary-light);
}

.contact__form {
  background-color: var(--color-bg-elevated);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2xl);
  border: 1px solid var(--color-border);
}

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

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.form-input {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: inherit;
  transition: all var(--transition-fast);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.form-error {
  color: var(--color-secondary);
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
  display: block;
  min-height: 1em;
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0;
}

.footer__content {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-xl);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__name {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.footer__tagline {
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  font-size: var(--font-size-base);
}

.footer__nav-title {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  color: var(--color-text-light);
  transition: color var(--transition-fast);
  padding: var(--space-xs) 0;
}

.footer__link:hover, .footer__link:focus {
  color: var(--color-primary);
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.footer__bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

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

/* ===== MODAL ===== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  visibility: hidden;
  opacity: 0;
  transition: all var(--transition-base);
}

.modal[hidden="false"] {
  visibility: visible;
  opacity: 1;
}

.modal__overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.modal__content {
  position: relative;
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  background-color: var(--color-bg-elevated);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transform: translateY(30px);
  transition: transform var(--transition-base);
}

.modal[hidden="false"] .modal__content {
  transform: translateY(0);
}

.modal__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  background-color: var(--color-bg-alt);
  transition: all var(--transition-fast);
  z-index: 2;
}

.modal__close:hover, .modal__close:focus {
  background-color: var(--color-secondary);
  color: white;
}

.modal__body {
  padding: var(--space-2xl);
  overflow-y: auto;
  max-height: 90vh;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-base);
  text-decoration: none;
  cursor: pointer;
}

.btn--primary {
  background-color: var(--color-primary);
  color: white;
  border: 2px solid var(--color-primary);
  box-shadow: 0 4px 6px rgba(37, 99, 235, 0.25);
}

.btn--primary:hover, .btn--primary:focus {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 8px 15px rgba(37, 99, 235, 0.35);
  color: white;
  text-decoration: none;
}

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

.btn--secondary:hover, .btn--secondary:focus {
  background-color: var(--color-bg-alt);
  color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.btn--full {
  width: 100%;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
  100% {
    transform: translateY(0px);
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 0.4;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.2;
  }
  100% {
    transform: scale(1);
    opacity: 0.4;
  }
}

/* ===== RESPONSIVE STYLES ===== */
@media (max-width: 992px) {
  .contact {
    grid-template-columns: 1fr;
  }
  
  .footer__content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 768px) {
  :root {
    --space-3xl: 3rem;
  }
  
  h1 { font-size: var(--font-size-4xl); }
  h2 { font-size: var(--font-size-2xl); }
  
  .nav__menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    padding: var(--space-lg);
    background-color: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 10;
  }
  
  .nav__menu.show {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav__toggle {
    display: block;
  }
  
  .nav__list {
    flex-direction: column;
    width: 100%;
  }
  
  .nav__link {
    display: block;
    width: 100%;
    padding: var(--space-md);
    text-align: center;
  }
  
  .hero__content {
    display: flex;
    flex-direction: column-reverse;
    text-align: center;
    gap: var(--space-2xl);
    justify-content: center;
    align-items: center;
  }
  
  .hero__image {
    transform: none;
    margin-bottom: var(--space-xl);
  }
  
  .hero__avatar {
    width: 220px;
    height: 220px;
  }
  
  .hero__cta {
    justify-content: center;
  }
  
  .hero__social {
    justify-content: center;
  }
  
  .about__details {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: var(--space-md);
  }
  
  .hero__name {
    font-size: var(--font-size-3xl);
  }
  
  .hero__cta {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
  }
  
  .contact__form {
    padding: var(--space-lg);
  }
}

/* ===== ACCESSIBILITY ===== */
@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;
  }
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}
/* 1) Kill any horizontal overflow (safer than hidden) */
html, body {
  width: 100%;
  max-width: 100%;
  overflow-x: clip;           /* prevents the white gutter on the right */
  background-color: var(--color-bg);
  overscroll-behavior-x: none;
}

/* 2) Make the Three.js canvas truly full-screen and behind everything */
#bg-canvas {
  position: fixed;
  inset: 0;                  /* top:0; right:0; bottom:0; left:0 */
  width: 100%;
  height: 100%;
  display: block;
  z-index: -2;               /* behind the site */
  pointer-events: none;
  background: transparent;
}

/* 3) Avoid horizontal shifts on hover that can cause overflow */
.timeline-card:hover,
.education-card:hover {
  transform: translateY(-4px); /* was translateX(...) */
}

.project-card:hover {
  transform: translateY(-8px); /* keep the effect but only on Y */
}

/* 4) Safety belts: prevent any rogue child from forcing width */
.container,
.section,
.header,
.projects,
img, video, canvas {
  max-width: 100%;
}

/* 5) Mobile menu (fixed + padding) can overflow: ensure boxing */
.nav__menu {
  box-sizing: border-box;
  width: 100%;
}