/* ============================================================
   PORTFOLIO STYLESHEET
   Dark mode: pure CSS via #darkmode-toggle checkbox inside header.
   Uses .page-wrapper:has(#darkmode-toggle:checked) — no scroll jump on toggle.
   Hero dot animation: .hero-bg only — rest of page is static.
   ============================================================ */

/* ---------- CSS Custom Properties (Light Theme) ---------- */
:root {
  --bg: #f8fafc;
  --bg-secondary: #e2e8f0;
  --text: #1e293b;
  --text-heading: #0f172a;
  --text-muted: #64748b;
  --text-inverse: #f8fafc;
  --card-bg: rgba(255, 255, 255, 0.65);
  --card-border: rgba(255, 255, 255, 0.4);
  --card-shadow: rgba(15, 23, 42, 0.08);
  --header-bg: rgba(255, 255, 255, 0.75);
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-dark: #4f46e5;
  --gradient-start: #6366f1;
  --gradient-end: #06b6d4;
  --hero-glow: rgba(99, 102, 241, 0.12);
  --hero-dot-color: rgba(99, 102, 241, 0.22);
  --timeline-marker: #6366f1;
  --link-hover: #4f46e5;
  --tag-bg: rgba(99, 102, 241, 0.1);
  --tag-text: #4f46e5;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 5rem;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --container-max: 1140px;
  --header-height: 4rem;
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-full: 9999px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ---------- Dark Theme (Pure CSS via :has) + contrast fixes ---------- */
.page-wrapper:has(#darkmode-toggle:checked) {
  --bg: #0f172a;
  --bg-secondary: #1e293b;
  --text: #cbd5e1;
  --text-heading: #f1f5f9;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(148, 163, 184, 0.15);
  --card-shadow: rgba(0, 0, 0, 0.35);
  --header-bg: rgba(15, 23, 42, 0.9);
  --accent: #818cf8;
  --accent-light: #a5b4fc;
  --accent-dark: #6366f1;
  --gradient-start: #818cf8;
  --gradient-end: #22d3ee;
  --hero-glow: rgba(129, 140, 248, 0.15);
  --hero-dot-color: rgba(129, 140, 248, 0.18);
  --timeline-marker: #818cf8;
  --link-hover: #a5b4fc;
  --tag-bg: rgba(129, 140, 248, 0.15);
  --tag-text: #c7d2fe;
}

/* Dark mode: solid heading colors for readability */
.page-wrapper:has(#darkmode-toggle:checked) h1,
.page-wrapper:has(#darkmode-toggle:checked) h2,
.page-wrapper:has(#darkmode-toggle:checked) h3,
.page-wrapper:has(#darkmode-toggle:checked) .hero-name,
.page-wrapper:has(#darkmode-toggle:checked) .timeline-degree,
.page-wrapper:has(#darkmode-toggle:checked) .project-title,
.page-wrapper:has(#darkmode-toggle:checked) .contact-label {
  color: var(--text-heading);
  -webkit-text-fill-color: var(--text-heading);
}

.page-wrapper:has(#darkmode-toggle:checked) .section-title {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-wrapper:has(#darkmode-toggle:checked) .glass-card {
  background: rgba(30, 41, 59, 0.7);
  border-color: rgba(148, 163, 184, 0.15);
}

.page-wrapper:has(#darkmode-toggle:checked) .about-text p:first-child {
  color: var(--text-heading);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--space-md));
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--link-hover);
}

ul {
  list-style: none;
}

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

.section {
  padding-block: var(--space-3xl);
  background-color: var(--bg);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: var(--space-2xl);
  font-size: 1.1rem;
}

/* ---------- Theme Checkbox ---------- */
.theme-checkbox {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
  /* Inside fixed header — toggling does not scroll the page */
}

.theme-toggle {
  cursor: pointer;
  display: flex;
  align-items: center;
  position: relative;
}

.theme-checkbox:focus-visible ~ .theme-toggle-track {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
  transition: background-color var(--transition-base);
}

/* ---------- Header & Navigation ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
  box-shadow: 0 4px 24px var(--card-shadow);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-md);
}

.nav-logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  justify-content: center;
}

.nav-link {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.875rem;
  position: relative;
  padding-block: var(--space-xs);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  inset-inline-start: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
  transition: width var(--transition-base);
}

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

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

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 0;
}

.lang-toggle {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-full);
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
  backdrop-filter: blur(8px);
}

.lang-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.theme-toggle-track {
  display: block;
  width: 3.25rem;
  height: 1.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-full);
  position: relative;
  transition: background var(--transition-base);
}

.theme-toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 1.35rem;
  height: 1.35rem;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base);
  box-shadow: 0 2px 8px var(--card-shadow);
}

.theme-icon {
  font-size: 0.65rem;
  color: white;
  position: absolute;
}

.theme-icon-light { opacity: 1; }
.theme-icon-dark { opacity: 0; }

.page-wrapper:has(#darkmode-toggle:checked) .theme-toggle-thumb {
  transform: translateX(1.5rem);
}

.page-wrapper:has(#darkmode-toggle:checked) .theme-icon-light { opacity: 0; }
.page-wrapper:has(#darkmode-toggle:checked) .theme-icon-dark { opacity: 1; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

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

.nav-toggle.active .nav-toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active .nav-toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: white;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.45);
  color: white;
}

.btn-outline {
  background: transparent;
  border-color: var(--accent);
  color: var(--accent);
}

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

/* CV download button in hero */
.btn-cv {
  gap: var(--space-sm);
}

.btn-cv i {
  font-size: 0.9rem;
}

/* ---------- Glass Card ---------- */
.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px var(--card-shadow);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px var(--card-shadow);
  border-color: rgba(99, 102, 241, 0.3);
}

/* ---------- Hero (animated dots ONLY in hero) ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: var(--header-height);
  overflow: hidden;
  background-color: var(--bg);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-color: transparent;
  background-image:
    radial-gradient(circle, var(--hero-dot-color) 1.5px, transparent 1.5px),
    radial-gradient(ellipse 80% 60% at 50% 0%, var(--hero-glow), transparent);
  background-size: 28px 28px, 100% 100%;
  background-position: 0 0, 0 0;
  will-change: background-position;
  animation: hero-dots-drift 30s linear infinite;
}

@keyframes hero-dots-drift {
  0%   { background-position: 0 0, 0 0; }
  100% { background-position: 28px 28px, 0 0; }
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-2xl);
  position: relative;
  z-index: 1;
}

.hero-greeting {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.05em;
}

.hero-name {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-md);
  color: var(--text-heading);
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
  max-width: 32ch;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.hero-image {
  display: flex;
  justify-content: center;
}

.profile-frame {
  position: relative;
  width: clamp(220px, 30vw, 340px);
  aspect-ratio: 1;
}

.profile-img {
  width: 110%;
  height: 110%;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--card-border);
  position: relative;
  z-index: 1;
}

.profile-ring {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  opacity: 0.6;
  animation: pulse-ring 3s ease-in-out infinite;
  z-index: 0;
}

@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50%       { transform: scale(1.04); opacity: 0.35; }
}

.scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  font-size: 1.25rem;
  animation: bounce 2s ease-in-out infinite;
  z-index: 1;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ---------- About (two-column) ---------- */
.about-layout {
  display: grid;
  grid-template-columns: minmax(240px, 300px) 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.about-info {
  padding: var(--space-lg);
}

.about-info:hover {
  transform: translateY(-4px);
}

.about-info-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--card-border);
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.5;
}

.about-info-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.about-info-list li:first-child {
  padding-top: 0;
}

.about-info-icon {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: var(--radius-sm);
  color: white;
  font-size: 0.85rem;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  text-align: start;
  padding-block: var(--space-sm);
}

.about-text p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
}

.about-text p:first-child {
  color: var(--text-heading);
  font-size: 1.05rem;
}

/* ---------- Skills / Tech & Tools ---------- */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  max-width: 800px;
  margin-inline: auto;
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  backdrop-filter: blur(8px);
  transition: all var(--transition-fast);
}

.skill-tag i {
  color: var(--accent);
  font-size: 1rem;
}

.skill-tag:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--card-shadow);
}

/* ---------- Timeline (Studies & Experience) ---------- */
.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  max-width: 720px;
  margin-inline: auto;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--gradient-start), var(--gradient-end));
  opacity: 0.3;
  inset-inline-start: 1.25rem;
}

.timeline-item {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-xl);
  position: relative;
  margin-inline-start: var(--space-2xl);
}

.timeline-marker {
  position: absolute;
  width: 14px;
  height: 14px;
  background: var(--timeline-marker);
  border-radius: 50%;
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 3px var(--timeline-marker);
  top: var(--space-xl);
  inset-inline-start: calc(-1 * var(--space-2xl) - 5px);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
}

.timeline-degree {
  font-size: 1.2rem;
  font-weight: 600;
  margin-block: var(--space-xs);
  color: var(--text-heading);
}

.timeline-school {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: var(--space-sm);
}

.timeline-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---------- Projects Grid ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

/* Two-project layout: side-by-side on desktop */
.projects-grid--two {
  max-width: 900px;
  margin-inline: auto;
  grid-template-columns: repeat(2, 1fr);
}

.project-card {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
}

.project-icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: var(--radius-sm);
  color: white;
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
}

.project-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-heading);
}

.project-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.tech-tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 500;
  font-family: var(--font-mono);
  background: var(--tag-bg);
  color: var(--tag-text);
  border-radius: var(--radius-full);
  border: 1px solid transparent;
}

.project-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: auto;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--card-border);
}

.project-actions--github-only {
  border-top: none;
  padding-top: 0;
}

.project-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  background: var(--tag-bg);
  color: var(--accent);
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.project-action:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-2px);
}

.project-action-text {
  width: auto;
  height: auto;
  padding: var(--space-xs) var(--space-sm);
  gap: var(--space-xs);
  font-size: 0.8rem;
  font-weight: 600;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 600;
  font-size: 0.85rem;
  margin-inline-start: auto;
}

.project-link i {
  transition: transform var(--transition-fast);
  font-size: 0.75rem;
}

.project-link:hover i {
  transform: translateX(4px);
}

[dir="rtl"] .project-link {
  margin-inline-start: 0;
  margin-inline-end: auto;
}

[dir="rtl"] .project-link:hover i {
  transform: translateX(-4px);
}

[dir="rtl"] .project-link i {
  transform: scaleX(-1);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  max-width: 900px;
  margin-inline: auto;
}

.contact-card {
  padding: var(--space-xl);
  text-align: center;
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.contact-card:hover {
  color: var(--text);
}

.contact-icon {
  font-size: 2rem;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-sm);
}

.contact-label {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-heading);
}

.contact-value {
  color: var(--text-muted);
  font-size: 0.85rem;
  word-break: break-all;
}

/* ---------- Footer + social icons ---------- */
.footer {
  padding: var(--space-xl) 0 var(--space-2xl);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--card-border);
  margin-top: auto;
  background-color: var(--bg);
}

.footer-rights {
  margin-top: var(--space-xs);
  font-size: 0.8rem;
  opacity: 0.85;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  font-size: 1.25rem;
  transition: all var(--transition-base);
}

.footer-social a:hover {
  color: white;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-color: transparent;
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 8px 20px var(--card-shadow);
}

/* ---------- Scroll Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.projects-grid.fade-in.visible .project-card:nth-child(2) { transition-delay: 0.1s; }

.contact-grid.fade-in.visible .contact-card:nth-child(2) { transition-delay: 0.1s; }
.contact-grid.fade-in.visible .contact-card:nth-child(3) { transition-delay: 0.2s; }

.timeline.fade-in.visible .timeline-item:nth-child(2) { transition-delay: 0.12s; }
.timeline.fade-in.visible .timeline-item:nth-child(3) { transition-delay: 0.24s; }

.experience-timeline.fade-in.visible .timeline-item:nth-child(2) { transition-delay: 0.12s; }
.experience-timeline.fade-in.visible .timeline-item:nth-child(3) { transition-delay: 0.24s; }

.skills-grid.fade-in.visible .skill-tag:nth-child(2) { transition-delay: 0.04s; }
.skills-grid.fade-in.visible .skill-tag:nth-child(3) { transition-delay: 0.08s; }
.skills-grid.fade-in.visible .skill-tag:nth-child(4) { transition-delay: 0.12s; }
.skills-grid.fade-in.visible .skill-tag:nth-child(5) { transition-delay: 0.16s; }

.projects-grid .project-card,
.contact-grid .contact-card,
.timeline .timeline-item,
.skills-grid .skill-tag {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.projects-grid.visible .project-card,
.contact-grid.visible .contact-card,
.timeline.visible .timeline-item,
.skills-grid.visible .skill-tag {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- RTL Support ---------- */
[dir="rtl"] {
  text-align: right;
}

[dir="rtl"] .nav-link::after {
  inset-inline-start: auto;
  inset-inline-end: 0;
}

[dir="rtl"] .hero-tagline {
  margin-inline-start: auto;
}

[dir="rtl"] .hero-cta {
  justify-content: flex-start;
}

[dir="rtl"] .section-title,
[dir="rtl"] .section-subtitle {
  text-align: center;
}

[dir="rtl"] .about-text {
  text-align: start;
}

[dir="rtl"] .about-info-list li {
  flex-direction: row;
}

/* ---------- Responsive: Tablet ---------- */
@media (max-width: 992px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-xl);
  }

  .hero-tagline {
    margin-inline: auto;
  }

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

  .hero-image {
    order: -1;
  }

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

  .contact-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .nav-links {
    gap: var(--space-sm);
  }

  .nav-link {
    font-size: 0.8rem;
  }
}

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

  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--header-bg);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    border-bottom: 1px solid var(--card-border);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
  }

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

  .nav-link {
    font-size: 1.1rem;
    padding-block: var(--space-sm);
    display: block;
    text-align: center;
  }

  [dir="rtl"] .nav-link {
    text-align: center;
  }

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

  .scroll-indicator {
    display: none;
  }

  .section {
    padding-block: var(--space-2xl);
  }

  .project-link {
    margin-inline-start: 0;
    width: 100%;
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  .header-controls {
    gap: var(--space-sm);
  }

  .lang-toggle {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.8rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 260px;
  }

  .project-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-bg {
    animation: none;
  }

  .fade-in,
  .profile-ring,
  .scroll-indicator {
    animation: none;
    transition: none;
  }
}