/* Reset & base */

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

:root {
  --primary-color: #000;
  --secondary-color: #555;
  --accent-color: #fff;
  --text-light: #777;
  --border-color: #e8e8e8;
  --bg-light: #fafafa;
  --bg-ultra-light: #fdfdfd;
  --shadow-light: rgba(0, 0, 0, 0.05);
  --shadow-medium: rgba(0, 0, 0, 0.1);
  --shadow-heavy: rgba(0, 0, 0, 0.15);
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --font-primary: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "SF Mono", Monaco, monospace;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--primary-color);
  background: var(--accent-color);
  overflow-x: hidden;
}

/* Loading */

.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--accent-color);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  opacity: 1;
  transition: opacity 0.5s ease;
}

.loading-screen.hidden {
  opacity: 0;
  pointer-events: none;
}

.loader {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.loading-animation {
  width: 80px;
  height: 80px;
  position: relative;
}

.circle {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--primary-color);
  border-radius: 50%;
  animation: loading-circles 1.2s linear infinite;
}

.circle1 { top: 0; left: 50%; transform: translateX(-50%); animation-delay: 0s; }
.circle2 { top: 10%; right: 20%; animation-delay: 0.15s; }
.circle3 { top: 50%; right: 0; transform: translateY(-50%); animation-delay: 0.3s; }
.circle4 { bottom: 10%; right: 20%; animation-delay: 0.45s; }
.circle5 { bottom: 0; left: 50%; transform: translateX(-50%); animation-delay: 0.6s; }
.circle6 { bottom: 10%; left: 20%; animation-delay: 0.75s; }
.circle7 { top: 50%; left: 0; transform: translateY(-50%); animation-delay: 0.9s; }
.circle8 { top: 10%; left: 20%; animation-delay: 1.05s; }

@keyframes loading-circles {
  0%, 80%, 100% { transform: scale(0); opacity: 0.5; }
  40% { transform: scale(1); opacity: 1; }
}

.loading-text {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.dots {
  display: flex;
  gap: 0.1rem;
}

.dots span {
  animation: loading-dots 1.5s infinite;
  font-weight: bold;
  font-size: 1.4rem;
}

.dot1 { animation-delay: 0s; }
.dot2 { animation-delay: 0.5s; }
.dot3 { animation-delay: 1s; }

@keyframes loading-dots {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-8px); }
}

/* Header & navigation */

.header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(25px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
  box-shadow: 0 2px 20px var(--shadow-light);
}

.nav {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 3rem;
}

.nav-btn {
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 500;
  color: var(--secondary-color);
  cursor: pointer;
  transition: var(--transition);
  padding: 0.5rem 0;
  position: relative;
}

.nav-btn:hover,
.nav-btn.active {
  color: var(--primary-color);
}

.nav-btn.active::after {
  content: "";
  position: absolute;
  bottom: -1rem;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-color);
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* Mobile nav toggle */

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 60px;
  height: 60px;
  cursor: pointer;
  position: relative;
  background: none;
  border: none;
  padding: 0;
  z-index: 1001;
}

.hamburger-line {
  width: 30px;
  height: 3px;
  background: var(--primary-color);
  position: absolute;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 2px;
}

.line1 { top: 18px; transform-origin: center; }
.line2 { top: 28px; transform-origin: center; }
.line3 { top: 38px; transform-origin: center; }

.close-text {
  position: absolute;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--primary-color);
  opacity: 0;
  transform: scale(0.8) rotate(45deg);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.nav-toggle.active .line1 {
  transform: rotate(45deg) translate(7px, 7px);
  width: 20px;
}

.nav-toggle.active .line2 {
  opacity: 0;
  transform: scale(0);
}

.nav-toggle.active .line3 {
  transform: rotate(-45deg) translate(7px, -7px);
  width: 20px;
}

.nav-toggle.active .close-text {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

.nav-toggle:hover .hamburger-line {
  background: var(--secondary-color);
}

.nav-toggle:hover .close-text {
  color: var(--secondary-color);
}

.nav-toggle.active:hover .hamburger-line {
  background: var(--primary-color);
}

.nav-toggle.active:hover .close-text {
  color: var(--primary-color);
}

/* Layout */

.main {
  margin-top: 80px;
  min-height: calc(100vh - 80px);
  background: var(--accent-color);
}

.page {
  display: none;
  min-height: calc(100vh - 80px);
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--accent-color);
}

.page.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.page-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 4rem 2rem;
  position: relative;
  z-index: 3;
}

/* Hero */

.hero-container {
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  position: relative;
  padding: 2rem;
  max-width: 100%;
  margin: 0 auto;
  background: var(--accent-color);
  overflow: hidden;
}

.hero-background {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: var(--accent-color);
}

.hero-bg-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  opacity: 0.3;
  filter: contrast(1.2) brightness(1.3);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.95) 0%,
    rgba(255, 255, 255, 0.85) 50%,
    rgba(255, 255, 255, 0.95) 100%
  );
  z-index: 2;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  z-index: 3;
  position: relative;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
  color: var(--primary-color);
}

.title-line {
  display: block;
  overflow: hidden;
}

.hero-description {
  font-size: 1.3rem;
  color: var(--secondary-color);
  line-height: 1.5;
  margin-bottom: 3rem;
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
  padding: 1rem 2rem;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border-radius: 8px;
}

.btn-primary {
  background: var(--primary-color);
  color: var(--accent-color);
  box-shadow: 0 4px 20px var(--shadow-medium);
}

.btn-secondary {
  background: var(--accent-color);
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  box-shadow: 0 4px 20px var(--shadow-light);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--shadow-heavy);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: var(--accent-color);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--shadow-medium);
}

/* Hero visual */

.hero-visual {
  position: relative;
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.visual-element {
  position: relative;
  width: 400px;
  height: 400px;
}

.floating-card {
  position: absolute;
  padding: 1.5rem 2rem;
  background: var(--accent-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 10px 40px var(--shadow-medium);
  font-weight: 600;
  animation: float 6s ease-in-out infinite;
  color: var(--primary-color);
}

.card-1 { top: 0; left: 0; animation-delay: 0s; }
.card-2 { top: 50%; right: 0; transform: translateY(-50%); animation-delay: 2s; }
.card-3 { bottom: 0; left: 50%; transform: translateX(-50%); animation-delay: 4s; }

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(2deg); }
}

/* Scroll indicator */

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
  z-index: 3;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: var(--text-light);
  margin: 1rem auto;
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(0.5); opacity: 0.5; }
}

/* Hero project conveyor */

.hero-project-conveyor {
  position: relative;
  width: 100%;
  margin-top: 2rem;
  padding: 1.5rem 0;
  overflow: hidden;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.9),
    rgba(255, 255, 255, 0.95),
    rgba(255, 255, 255, 0.9)
  );
}

.hero-project-track {
  display: flex;
  gap: 1.5rem;
  width: max-content;
  animation: hero-project-scroll 35s linear infinite;
}

.hero-project-item {
  flex: 0 0 auto;
  width: 400px;
  height: 300px;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 16px 40px var(--shadow-medium);
  background: var(--bg-ultra-light);
  border: 1px solid var(--border-color);
  transform: translateY(0);
  transition: var(--transition);
}

.hero-project-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-project-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 60px var(--shadow-heavy);
}

.hero-project-conveyor:hover .hero-project-track {
  animation-play-state: paused;
}

@keyframes hero-project-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* Page headers */

.page-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--primary-color);
}

.page-subtitle {
  font-size: 1.2rem;
  color: var(--secondary-color);
  margin-bottom: 4rem;
  max-width: 600px;
  line-height: 1.5;
}

/* Work page background */

#work.page {
  position: relative;
  background: var(--accent-color);
  min-height: calc(100vh - 80px);
}

.work-background {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: var(--accent-color);
  overflow: hidden;
  pointer-events: none;
}

.work-bg-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  opacity: 0.3;
  filter: contrast(1.2) brightness(1.3);
}

.work-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.95) 0%,
    rgba(255, 255, 255, 0.85) 50%,
    rgba(255, 255, 255, 0.95) 100%
  );
  z-index: 2;
  pointer-events: none;
}

/* Work section */

.work-filter {
  display: flex;
  gap: 1rem;
  margin-bottom: 4rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.8rem 1.5rem;
  background: var(--accent-color);
  border: 1px solid var(--border-color);
  color: var(--secondary-color);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  border-radius: 30px;
  font-weight: 500;
  box-shadow: 0 2px 10px var(--shadow-light);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary-color);
  color: var(--accent-color);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--shadow-medium);
}

/* Compact project grid & cards */

.projects-grid {
  max-width: 1400px;
  margin: 3rem auto 0;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.project-card {
  cursor: pointer;
  transition: var(--transition);
  border-radius: 18px;
  overflow: hidden;
  background: var(--accent-color);
  box-shadow: 0 10px 30px var(--shadow-light);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px var(--shadow-medium);
}

.project-image {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0,0,0,0.65),
    rgba(0,0,0,0.1)
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  padding: 1.25rem;
  display: flex;
  align-items: flex-end;
}

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

.project-description {
  color: #fff;
  font-size: 0.9rem;
}

.project-info {
  padding: 1.25rem 1.5rem 1.5rem;
  background: var(--accent-color);
}

.project-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
  color: var(--primary-color);
}

/* About */

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 6rem;
  align-items: start;
  padding: 3rem;
  position: relative;
  z-index: 3;
}

#about.page {
  position: relative;
  min-height: calc(100vh - 80px);
  background: var(--accent-color);
}

#about .page-container {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
  position: relative;
  z-index: 3;
}

.about-background {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.about-bg-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  opacity: 0.3;
  filter: contrast(1.2) brightness(1.3);
}

.about-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.95) 0%,
    rgba(255, 255, 255, 0.85) 50%,
    rgba(255, 255, 255, 0.95) 100%
  );
  z-index: 2;
  pointer-events: none;
}

.about-intro {
  font-size: 1.4rem;
  color: var(--secondary-color);
  margin-bottom: 2rem;
  line-height: 1.4;
}

.about-details p {
  margin-bottom: 1.5rem;
  color: var(--secondary-color);
  line-height: 1.6;
}

.about-stats {
  display: flex;
  gap: 3rem;
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border-color);
}

.stat {
  text-align: center;
  padding: 1.5rem;
  background: var(--bg-light);
  border-radius: 12px;
  flex: 1;
  box-shadow: 0 4px 15px var(--shadow-light);
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

/* Languages & profile */

.languages-section {
  margin-top: 3rem;
  padding: 2rem;
  background: var(--bg-light);
  border-radius: 16px;
  box-shadow: 0 4px 20px var(--shadow-light);
}

.languages-section h3 {
  margin-bottom: 1.5rem;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--primary-color);
}

.language-list {
  list-style: none;
  padding-left: 0;
}

.language-list li {
  font-weight: 500;
  color: var(--secondary-color);
  padding: 0.5rem 0;
  font-size: 1rem;
}

.language-list li span {
  font-weight: 600;
  color: var(--primary-color);
  margin-left: 0.5rem;
}

.profile-section {
  text-align: center;
  margin-bottom: 3rem;
  padding: 2rem;
  background: var(--bg-light);
  border-radius: 16px;
  box-shadow: 0 4px 20px var(--shadow-light);
}

.profile-image {
  width: 200px;
  height: 200px;
  margin: 0 auto 2rem;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--accent-color);
  box-shadow: 0 8px 30px var(--shadow-medium);
}

.profile-placeholder {
  width: 100%;
  height: 100%;
  background: var(--accent-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-weight: 500;
}

.profile-info h3 {
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--primary-color);
}

.availability {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  animation: pulse 2s infinite;
}

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

/* Skills */

.skills-section {
  background: var(--bg-light);
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px var(--shadow-light);
}

.skills-section h3 {
  margin-bottom: 2rem;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--primary-color);
}

.skills-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem;
  border-radius: 8px;
  transition: var(--transition);
}

.skill-item:hover {
  background: rgba(0, 0, 0, 0.02);
}

.skill-name {
  font-weight: 600;
  color: var(--primary-color);
  width: 120px;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.skill-grade {
  flex-grow: 1;
  height: 12px;
  background: var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.05);
  position: relative;
}

.skill-grade-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), #333);
  border-radius: 6px 0 0 6px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0%;
}

.skill-score {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--secondary-color);
  min-width: 35px;
  text-align: right;
  flex-shrink: 0;
}

/* Contact */

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: start;
}

.contact-details {
  margin-bottom: 3rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  padding: 2rem;
  background: var(--accent-color);
  border-radius: 16px;
  transition: var(--transition);
  box-shadow: 0 4px 20px var(--shadow-light);
  border: 1px solid var(--border-color);
}

.contact-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--shadow-medium);
}

.contact-icon {
  font-size: 1.5rem;
  width: 50px;
  text-align: center;
}

.contact-text h3 {
  margin-bottom: 0.3rem;
  font-weight: 600;
  color: var(--primary-color);
}

.contact-text a {
  color: var(--secondary-color);
  text-decoration: none;
  transition: var(--transition);
}

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

.working-with {
  background: var(--accent-color);
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px var(--shadow-light);
  border: 1px solid var(--border-color);
}

.working-with h3 {
  margin-bottom: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
}

.help-list {
  list-style: none;
}

.help-list li {
  padding: 0.5rem 0;
  color: var(--secondary-color);
  position: relative;
  padding-left: 1.5rem;
}

.help-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: 600;
}

/* Contact form */

.contact-form {
  background: var(--accent-color);
  padding: 3rem;
  border-radius: 20px;
  box-shadow: 0 10px 40px var(--shadow-light);
  border: 1px solid var(--border-color);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-group {
  margin-bottom: 2rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.8rem;
  font-weight: 600;
  color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 1rem 1.2rem;
  border: 2px solid var(--border-color);
  background: var(--bg-ultra-light);
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
  box-shadow: 0 2px 8px var(--shadow-light);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 4px 20px var(--shadow-medium);
  background: var(--accent-color);
}

.form-submit {
  width: 100%;
  padding: 1.2rem 2rem;
  background: var(--primary-color);
  color: var(--accent-color);
  border: none;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 4px 20px var(--shadow-medium);
}

.form-submit:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--shadow-heavy);
}

.form-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.submit-arrow {
  transition: var(--transition);
}

.form-submit:hover:not(:disabled) .submit-arrow {
  transform: translateX(5px);
}

/* Footer */

.footer {
  background: var(--bg-light);
  border-top: 1px solid var(--border-color);
  padding: 3rem 2rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-left p {
  color: var(--text-light);
  font-size: 0.9rem;
}

.social-links {
  display: flex;
  gap: 2rem;
}

.social-links a {
  color: var(--secondary-color);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
  font-weight: 500;
}

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

/* Notifications */

.notification {
  position: fixed;
  top: 100px;
  right: 20px;
  padding: 1rem 1.5rem;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  z-index: 10000;
  transform: translateX(400px);
  transition: transform 0.3s ease;
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 350px;
  font-weight: 500;
  color: white;
}

.notification.notification-success { background: #22c55e; }
.notification.notification-error { background: #ef4444; }
.notification.notification-warning { background: #f59e0b; }
.notification.notification-info { background: #3b82f6; }

.notification-close {
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  margin-left: 1rem;
  opacity: 0.8;
  transition: opacity 0.2s ease;
}

.notification-close:hover {
  opacity: 1;
}

/* Responsive */

@media (max-width: 1024px) {
  .hero-content,
  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
  }

  .about-stats {
    gap: 2rem;
  }

  .hero-bg-image {
    object-fit: cover;
  }

  .loading-animation {
    width: 60px;
    height: 60px;
  }

  .circle {
    width: 10px;
    height: 10px;
  }
}

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

  .nav-menu.active {
    display: flex;
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    padding: 2rem;
    flex-direction: column;
    gap: 2rem;
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
  }

  .nav-toggle {
    display: flex;
  }

  .page-container {
    padding: 2rem 1rem;
  }

  .hero-container {
    padding: 1rem;
    text-align: center;
  }

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

  .about-stats {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .projects-grid {
    margin-top: 2rem;
    padding: 0 1rem;
    grid-template-columns: 1fr;
  }

  .contact-form,
  .about-content {
    padding: 2rem;
  }

  .hero-bg-image {
    opacity: 0.08;
  }

  .notification {
    right: 10px !important;
    max-width: calc(100vw - 20px) !important;
  }

  .loading-text {
    font-size: 1.2rem;
  }

  .loading-animation {
    width: 50px;
    height: 50px;
  }

  .circle {
    width: 8px;
    height: 8px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .page-title {
    font-size: 2rem;
  }

  .visual-element {
    width: 300px;
    height: 300px;
  }

  .floating-card {
    padding: 1rem 1.5rem;
    font-size: 0.9rem;
  }

  .skill-name {
    width: 100px;
    font-size: 0.9rem;
  }

  .skill-score {
    font-size: 0.8rem;
    min-width: 30px;
  }

  .loading-text {
    font-size: 1rem;
  }

  .loading-animation {
    width: 40px;
    height: 40px;
  }

  .circle {
    width: 6px;
    height: 6px;
  }
}

/* Scrollbar & selection */

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-color);
}

::selection {
  background: var(--primary-color);
  color: var(--accent-color);
}