/* ===== CSS Variables ===== */
:root {
  --bg: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --card: #FFFFFF;
  --primary: #2563EB;
  --secondary: #7C3AED;
  --text: #0F172A;
  --text-sub: #475569;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.4);
  --shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 60px rgba(15, 23, 42, 0.12);
  --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
  --header-height: 4.5rem;
  --radius: 1rem;
  --radius-lg: 1.5rem;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
}

[data-theme="dark"] {
  --bg: #0F172A;
  --bg-secondary: #111827;
  --card: #1E293B;
  --primary: #3B82F6;
  --secondary: #8B5CF6;
  --text: #FFFFFF;
  --text-sub: #CBD5E1;
  --glass-bg: rgba(30, 41, 59, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

body.loading {
  overflow: hidden;
}

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

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

ul {
  list-style: none;
}

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

.container {
  width: min(1140px, 92%);
  margin-inline: auto;
}

.section {
  padding: 5rem 0;
  position: relative;
}

.section__header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section__tag {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section__subtitle {
  color: var(--text-sub);
  max-width: 540px;
  margin-inline: auto;
}

/* ===== Glass Effect ===== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

/* ===== Loader ===== */
.loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__inner {
  text-align: center;
}

.loader__logo {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.5rem;
  animation: pulse 1.5s ease-in-out infinite;
}

.loader__bar {
  width: 200px;
  height: 4px;
  background: var(--bg-secondary);
  border-radius: 2px;
  overflow: hidden;
  margin: 0 auto 1rem;
}

.loader__progress {
  height: 100%;
  width: 0;
  background: var(--gradient);
  border-radius: 2px;
  animation: loadProgress 1.8s ease forwards;
}

.loader__text {
  font-size: 0.875rem;
  color: var(--text-sub);
}

@keyframes loadProgress {
  to { width: 100%; }
}

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

/* ===== Animated Background ===== */
.bg-animation {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.bg-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 40%, rgba(59, 130, 246, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 92, 246, 0.1), transparent);
}

[data-theme="dark"] .bg-gradient {
  background:
    radial-gradient(ellipse 80% 50% at 20% 40%, rgba(59, 130, 246, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 92, 246, 0.12), transparent);
}

.floating-shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.4;
  filter: blur(40px);
}

.shape-1 {
  width: 300px;
  height: 300px;
  background: var(--primary);
  top: 10%;
  left: 5%;
  animation: float 8s ease-in-out infinite;
}

.shape-2 {
  width: 200px;
  height: 200px;
  background: var(--secondary);
  top: 60%;
  right: 10%;
  animation: float 10s ease-in-out infinite reverse;
}

.shape-3 {
  width: 150px;
  height: 150px;
  background: var(--primary);
  bottom: 20%;
  left: 30%;
  animation: float 7s ease-in-out infinite 1s;
}

.shape-4 {
  width: 250px;
  height: 250px;
  background: var(--secondary);
  top: 30%;
  right: 25%;
  animation: float 9s ease-in-out infinite 0.5s;
}

.shape-5 {
  width: 180px;
  height: 180px;
  background: var(--primary);
  bottom: 10%;
  right: 40%;
  animation: float 11s ease-in-out infinite 2s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* ===== Header / Navbar ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: var(--header-height);
  transition: background var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
}

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

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
}

.nav__logo-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  color: #fff;
  border-radius: 0.75rem;
  font-size: 0.875rem;
}

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

.nav__menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav__link {
  padding: 0.5rem 0.875rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-sub);
  border-radius: 0.5rem;
  transition: color var(--transition), background var(--transition);
}

.nav__link:hover,
.nav__link.active {
  color: var(--primary);
  background: rgba(59, 130, 246, 0.1);
}

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

.lang-toggle,
.theme-toggle {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.75rem;
  color: var(--text);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  transition: transform var(--transition), background var(--transition);
}

.lang-toggle {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.8rem;
}

.lang-toggle:hover,
.theme-toggle:hover {
  transform: scale(1.05);
  border-color: var(--primary);
  color: var(--primary);
}

.theme-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
}

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

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 2rem;
  padding: 0.25rem;
}

.nav__toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 0.75rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn--primary:hover {
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.5);
}

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

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

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
}

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

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero__greeting {
  font-size: 1.125rem;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.hero__name {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 0.25rem;
}

.hero__name-ar {
  display: block;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: 0.25rem;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  font-weight: 500;
  color: var(--text-sub);
  min-height: 2rem;
  margin-bottom: 1rem;
}

.typing-cursor {
  color: var(--primary);
  animation: blink 0.8s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero__bio {
  color: var(--text-sub);
  font-size: 1.05rem;
  margin-bottom: 2rem;
  max-width: 520px;
}

.hero__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.hero__social {
  display: flex;
  gap: 1rem;
}

.hero__social a {
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.75rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-sub);
  transition: color var(--transition), transform var(--transition), border-color var(--transition);
}

.hero__social a:hover {
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-3px);
}

.hero__social svg {
  width: 1.25rem;
  height: 1.25rem;
}

.hero__image-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero__glow {
  position: absolute;
  width: 80%;
  height: 80%;
  background: var(--gradient);
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.35;
  animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.35; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.05); }
}

.hero__image-border {
  position: relative;
  padding: 4px;
  border-radius: 50%;
  background: var(--gradient);
  animation: borderRotate 6s linear infinite;
}

@keyframes borderRotate {
  to { filter: hue-rotate(360deg); }
}

.hero__image {
  width: clamp(260px, 35vw, 380px);
  border-radius: 50%;
  aspect-ratio: 1;
  object-fit: cover;
  background: var(--card);
}

/* ===== Stats ===== */
.stats {
  padding: 2rem 0;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.stat-card {
  padding: 1.75rem 1.25rem;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.stat-card__number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card__label {
  font-size: 0.9rem;
  color: var(--text-sub);
  margin-top: 0.25rem;
}

.stat-card--badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.stat-card__badge-dot {
  width: 12px;
  height: 12px;
  background: #22C55E;
  border-radius: 50%;
  animation: badgePulse 2s ease-in-out infinite;
  box-shadow: 0 0 12px #22C55E;
}

@keyframes badgePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ===== About ===== */
.about__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.about-card {
  padding: 2rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.about-card__icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.about-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.about-card p {
  color: var(--text-sub);
  font-size: 0.95rem;
}

.about-card--tech {
  grid-column: span 2;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tags span {
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  border-radius: 2rem;
  border: 1px solid rgba(59, 130, 246, 0.2);
  transition: transform var(--transition), background var(--transition);
}

.tech-tags span:hover {
  transform: scale(1.05);
  background: rgba(59, 130, 246, 0.2);
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  max-width: 700px;
  margin-inline: auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  inset-inline-end: 7px;
  width: 2px;
  background: var(--gradient);
  border-radius: 2px;
}

.timeline__item {
  position: relative;
  padding-inline-end: 2.5rem;
  padding-bottom: 2.5rem;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  inset-inline-end: 0;
  top: 0.5rem;
  width: 16px;
  height: 16px;
  background: var(--gradient);
  border-radius: 50%;
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 3px var(--primary);
  z-index: 1;
}

.timeline__content {
  padding: 1.75rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.timeline__content:hover {
  transform: translateX(calc(-5px * var(--dir-sign, 1)));
  box-shadow: var(--shadow-lg);
}

html[dir="rtl"] { --dir-sign: 1; }
html[dir="ltr"] { --dir-sign: -1; }

.timeline__date {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.timeline__content h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}

.timeline__place {
  color: var(--text-sub);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.timeline__courses,
.timeline__list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.timeline__courses li,
.timeline__list li {
  color: var(--text-sub);
  font-size: 0.9rem;
  padding-inline-start: 1rem;
  position: relative;
}

.timeline__courses li::before,
.timeline__list li::before {
  content: '▸';
  position: absolute;
  inset-inline-start: 0;
  color: var(--primary);
}

/* ===== Skills ===== */
.skills__grid {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 2rem;
  align-items: start;
}

.skill-group__title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  margin-bottom: 1.25rem;
  color: var(--primary);
}

.skill-item {
  margin-bottom: 1.25rem;
}

.skill-item__header {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.skill-item__bar {
  height: 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  overflow: hidden;
}

.skill-item__progress {
  height: 100%;
  width: 0;
  background: var(--gradient);
  border-radius: 4px;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-cards__grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.skill-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.skill-card:hover {
  transform: translateX(calc(-5px * var(--dir-sign, 1)));
  box-shadow: var(--shadow-lg);
}

.skill-card__icon {
  font-size: 1.5rem;
}

/* ===== Projects ===== */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.project-card {
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 2px;
  background: var(--gradient);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

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

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.project-card__image {
  overflow: hidden;
  aspect-ratio: 16/9;
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.project-card__body {
  padding: 1.5rem;
}

.project-card__body h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.project-card__body p {
  color: var(--text-sub);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.project-card__tech span {
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  background: rgba(139, 92, 246, 0.15);
  color: var(--secondary);
  border-radius: 1rem;
}

.project-card__links {
  display: flex;
  gap: 0.75rem;
}

/* ===== Testimonials ===== */
.testimonials__slider {
  max-width: 640px;
  margin-inline: auto;
  overflow: hidden;
  direction: ltr;
}

.testimonials__track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.testimonial-card {
  min-width: 100%;
  padding: 2.5rem;
  text-align: center;
  direction: rtl;
}

.testimonial-card__stars {
  color: #FBBF24;
  font-size: 1.25rem;
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}

.testimonial-card p {
  color: var(--text-sub);
  font-size: 1.05rem;
  font-style: italic;
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.testimonial-card__author img {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--primary);
}

.testimonial-card__author strong {
  display: block;
  font-family: var(--font-heading);
}

.testimonial-card__author span {
  font-size: 0.85rem;
  color: var(--text-sub);
}

.testimonials__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.testimonials__btn {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.testimonials__btn:hover {
  background: var(--primary);
  color: #fff;
  transform: scale(1.1);
}

.testimonials__dots {
  display: flex;
  gap: 0.5rem;
}

.testimonials__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-sub);
  opacity: 0.3;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
}

.testimonials__dot.active {
  opacity: 1;
  background: var(--primary);
  transform: scale(1.2);
}

/* ===== Services ===== */
.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.service-card {
  padding: 2rem;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.service-card__icon {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  border-radius: 1rem;
  color: #fff;
}

.service-card__icon svg {
  width: 1.75rem;
  height: 1.75rem;
}

.service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
}

.service-card p {
  color: var(--text-sub);
  font-size: 0.9rem;
}

/* ===== Contact ===== */
.contact__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
  align-items: start;
}

.contact-form {
  padding: 2rem;
}

.form-group {
  position: relative;
  margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1rem 0.5rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  background: var(--bg-secondary);
  border: 2px solid transparent;
  border-radius: 0.75rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}

.form-group label {
  position: absolute;
  top: 1rem;
  inset-inline-end: 1rem;
  color: var(--text-sub);
  font-size: 1rem;
  pointer-events: none;
  transition: top var(--transition), font-size var(--transition), color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group input:not(:placeholder-shown),
.form-group textarea:not(:placeholder-shown) {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-group input.invalid,
.form-group textarea.invalid {
  border-color: #EF4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: 0.35rem;
  font-size: 0.75rem;
  color: var(--primary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: transparent;
}

.form-error {
  display: block;
  font-size: 0.8rem;
  color: #EF4444;
  margin-top: 0.35rem;
  min-height: 1.2em;
}

.form-success {
  text-align: center;
  color: #22C55E;
  font-weight: 500;
  margin-top: 1rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-info__item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  transition: transform var(--transition);
}

.contact-info__item:hover {
  transform: translateX(calc(-5px * var(--dir-sign, 1)));
}

.contact-info__item svg {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--primary);
  flex-shrink: 0;
}

.contact-info__item h4 {
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-bottom: 0.15rem;
}

.contact-info__item a,
.contact-info__item p {
  font-weight: 500;
  font-size: 0.95rem;
}

.contact-info__item a:hover {
  color: var(--primary);
}

.contact-info__social {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

.contact-info__social a {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 0.5rem;
  transition: background var(--transition), color var(--transition);
}

.contact-info__social a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-secondary);
  padding: 3rem 0 0;
  border-top: 1px solid var(--glass-border);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
}

.footer__brand p {
  color: var(--text-sub);
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: 280px;
}

.footer__links h4,
.footer__social h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin-bottom: 1rem;
}

.footer__links ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__links a {
  color: var(--text-sub);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer__links a:hover {
  color: var(--primary);
}

.footer__social-links {
  display: flex;
  gap: 0.75rem;
}

.footer__social-links a {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 0.5rem;
  color: var(--text-sub);
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

.footer__social-links a:hover {
  color: #fff;
  background: var(--primary);
  transform: translateY(-3px);
}

.footer__bottom {
  padding: 1.25rem 0;
  border-top: 1px solid var(--glass-border);
  text-align: center;
}

.footer__bottom p {
  font-size: 0.85rem;
  color: var(--text-sub);
}

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  inset-inline-start: 2rem;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  color: #fff;
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
  z-index: 900;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
}

.back-to-top svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* ===== Scroll Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__bio {
    margin-inline: auto;
  }

  .hero__buttons,
  .hero__social {
    justify-content: center;
  }

  .hero__image-wrapper {
    order: -1;
  }

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

  .skill-cards {
    grid-column: span 2;
  }

  .skill-cards__grid {
    flex-direction: row;
  }

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

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

@media (max-width: 768px) {
  .nav__menu {
    position: fixed;
    top: var(--header-height);
    inset-inline-end: -100%;
    width: 80%;
    max-width: 320px;
    height: calc(100vh - var(--header-height));
    flex-direction: column;
    align-items: stretch;
    padding: 2rem 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-inline-start: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    transition: inset-inline-end var(--transition);
    gap: 0.25rem;
  }

  .nav__menu.show {
    inset-inline-end: 0;
  }

  .nav__link {
    padding: 0.875rem 1rem;
    font-size: 1rem;
  }

  .nav__toggle {
    display: flex;
  }

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

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

  .about-card--tech {
    grid-column: span 1;
  }

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

  .skill-cards {
    grid-column: span 1;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer__brand p {
    margin-inline: auto;
  }

  .footer__social-links {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 3.5rem 0;
  }

  .hero__buttons {
    flex-direction: column;
  }

  .hero__buttons .btn {
    width: 100%;
  }

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

  .skill-cards__grid {
    flex-direction: column;
  }

  .project-card__links {
    flex-direction: column;
  }

  .project-card__links .btn {
    width: 100%;
  }
}