@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap");

:root {
  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Monaco, "Cascadia Code", monospace;

  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* Primary Colors */
  --primary-50: #f0f9ff;
  --primary-100: #e0f2fe;
  --primary-200: #bae6fd;
  --primary-300: #7dd3fc;
  --primary-400: #38bdf8;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  --primary-800: #075985;
  --primary-900: #0c4a6e;

  /* Accent Colors */
  --accent-purple: #8b5cf6;
  --accent-teal: #14b8a6;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  /* Neutral Colors */
  --gray-50: #fafafa;
  --gray-100: #f4f4f5;
  --gray-200: #e4e4e7;
  --gray-300: #d4d4d8;
  --gray-400: #a1a1aa;
  --gray-500: #71717a;
  --gray-600: #52525b;
  --gray-700: #3f3f46;
  --gray-800: #27272a;
  --gray-900: #18181b;
  --gray-950: #09090b;

  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* Type Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm: 0.125rem;
  --radius-default: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1),
    0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);
  --shadow-primary: 0 10px 40px -10px rgba(14, 165, 233, 0.3);
  --shadow-purple: 0 10px 40px -10px rgba(139, 92, 246, 0.3);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #0ea5e9, #0284c7);
  --gradient-accent: linear-gradient(135deg, #0ea5e9, #8b5cf6);
  --gradient-white: linear-gradient(135deg, #ffffff, #f8fafc, #f1f5f9);
  --gradient-mesh: radial-gradient(
      at 20% 50%,
      rgba(14, 165, 233, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(at 80% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    radial-gradient(at 40% 20%, rgba(20, 184, 166, 0.15) 0%, transparent 50%);

  /* Transitions */
  --duration-75: 75ms;
  --duration-100: 100ms;
  --duration-150: 150ms;
  --duration-200: 200ms;
  --duration-300: 300ms;
  --duration-500: 500ms;
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --gray-950: #fafafa;
  --gray-900: #f4f4f5;
  --gray-800: #e4e4e7;
  --gray-700: #d4d4d8;
  --gray-600: #a1a1aa;
  --gray-500: #71717a;
  --gray-400: #52525b;
  --gray-300: #3f3f46;
  --gray-200: #27272a;
  --gray-100: #18181b;
  --gray-50: #09090b;

  --primary-500: #38bdf8;
  --primary-600: #0ea5e9;
  --primary-700: #7dd3fc;
  --primary-400: #0284c7;

  --shadow-primary: 0 10px 40px -10px rgba(56, 189, 248, 0.3);
  --gradient-white: linear-gradient(135deg, #09090b, #111827, #030712);
  --gradient-mesh: radial-gradient(
      at 20% 50%,
      rgba(56, 189, 248, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(at 40% 20%, rgba(20, 184, 166, 0.1) 0%, transparent 50%);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  background: var(--gradient-white);
  color: var(--gray-900);
  line-height: 1.6;
  transition: background 0.3s ease, color 0.3s ease;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-mesh);
  pointer-events: none;
  z-index: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--gray-900);
  font-weight: var(--font-bold);
  line-height: 1.2;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--duration-200) var(--ease-out);
}

img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* Container */
.container {
  max-width: var(--breakpoint-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
  position: relative;
  z-index: 1;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  height: 72px;
  transition: all var(--duration-300) var(--ease-out);
}

[data-theme="dark"] .navbar {
  background: rgba(9, 9, 11, 0.95);
  border-bottom: 1px solid var(--gray-800);
}

.navbar__container {
  max-width: var(--breakpoint-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.navbar__logo {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform var(--duration-300) var(--ease-bounce);
}

.navbar__logo:hover {
  transform: scale(1.05) rotate(-2deg);
}

.navbar__logo-img {
  height: 48px;
  width: auto;
  transition: transform var(--duration-300) var(--ease-bounce);
}

.navbar__logo-img:hover {
  transform: scale(1.1) rotate(-5deg);
}

[data-theme="dark"] .navbar__logo-img {
  filter: brightness(0) invert(1);
}

.navbar__menu {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

[data-theme="dark"] .navbar__link {
  color: #fff;
}

.navbar__link {
  color: var(--gray-600);
  font-weight: var(--font-medium);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  position: relative;
  transition: all var(--duration-200) var(--ease-out);
}

.navbar__link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: all var(--duration-300) var(--ease-out);
  transform: translateX(-50%);
}

.navbar__link:hover {
  color: var(--primary-600);
  background: var(--primary-50);
}

[data-theme="dark"] .navbar__link:hover {
  background: var(--gray-800);
}

.navbar__link:hover::after,
.navbar__link.active::after {
  width: 80%;
}

.navbar__link:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.navbar__progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--gradient-accent);
  transition: width var(--duration-300) var(--ease-out);
  width: 0%;
}

/* Profile/Hero Section */
.profile {
  padding: calc(var(--space-24) + 72px) 0 var(--space-16);
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.profile__container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
}

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

.profile__data {
  text-align: center;
  animation: fadeInUp 0.8s ease-out;
}

.profile__border {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 0 auto var(--space-6);
  padding: 4px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  box-shadow: var(--shadow-xl), var(--shadow-primary);
  animation: scaleIn 0.8s ease-out;
}

.profile__border::before {
  content: "";
  position: absolute;
  inset: -20px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  opacity: 0.2;
  filter: blur(40px);
  animation: pulse 3s ease-in-out infinite;
}

.profile__image-container {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  overflow: hidden;
  background: var(--gray-100);
  position: relative;
}

.profile__image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile__intro {
  font-size: var(--text-4xl);
  font-weight: var(--font-extrabold);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-2);
}

.profile__profession {
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  color: var(--gray-600);
  margin-bottom: var(--space-4);
}

.profile__social {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
}

.profile__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background: var(--gray-100);
  color: var(--gray-600);
  transition: all var(--duration-300) var(--ease-bounce);
  font-size: var(--text-xl);
}

[data-theme="dark"] .profile__social-link {
  background: var(--gray-800);
}

.profile__social-link:hover {
  transform: translateY(-4px);
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: var(--shadow-lg), var(--shadow-primary);
}

.profile__info {
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.profile__value-prop {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--gray-900);
  margin-bottom: var(--space-4);
  line-height: 1.3;
}

.profile__credibility {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  background: var(--primary-100);
  color: var(--primary-700);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-6);
}

[data-theme="dark"] .profile__credibility {
  background: var(--primary-900);
  color: var(--primary-300);
}

.profile__info-description {
  font-size: var(--text-lg);
  color: var(--gray-600);
  line-height: 1.7;
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  cursor: pointer;
  transition: all var(--duration-200) var(--ease-out);
  text-decoration: none;
  border: none;
  position: relative;
  overflow: hidden;
}

.button::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width var(--duration-500) ease, height var(--duration-500) ease;
}

.button:active::before {
  width: 300px;
  height: 300px;
}

.button-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: var(--shadow-md), var(--shadow-primary);
}

.button-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), var(--shadow-primary);
}

.button--outline {
  background: transparent;
  border: 2px solid var(--primary-500);
  color: var(--primary-600);
}

.button--outline:hover {
  background: var(--gradient-accent);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-primary);
}

.button__small {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
}

.button--large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

/* Section Titles */
.section__title {
  font-size: var(--text-4xl);
  font-weight: var(--font-extrabold);
  text-align: center;
  margin-bottom: var(--space-12);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  padding-bottom: var(--space-4);
}

.section__title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 60px;
  height: 4px;
  background: var(--gradient-accent);
  transform: translateX(-50%);
  border-radius: var(--radius-full);
}

/* Projects Section */
.projects {
  padding: var(--space-20) 0;
  position: relative;
}

.projects__featured {
  margin-bottom: var(--space-16);
}

.projects__section-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--gray-700);
  margin-bottom: var(--space-8);
}

.projects__featured-grid,
.projects__content {
  display: grid;
  gap: var(--space-6);
}

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

.projects__content {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.projects__card {
  position: relative;
  background: #fff;
  border-radius: var(--radius-xl);
  overflow: hidden;
  height: 380px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-100);
  transition: all var(--duration-300) var(--ease-out);
}

[data-theme="dark"] .projects__card {
  background: var(--gray-900);
  border-color: var(--gray-800);
}

.projects__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--duration-300) var(--ease-out);
  transform-origin: left;
}

.projects__card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl), var(--shadow-primary);
}

.projects__card:hover::before {
  transform: scaleX(1);
}

.projects__card--featured {
  height: 450px;
}

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

.projects__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-500) var(--ease-out);
}

.projects__card:hover .projects__img {
  transform: scale(1.05);
}

.projects__modal {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(9, 9, 11, 0.98) 0%,
    rgba(9, 9, 11, 0.9) 30%,
    rgba(9, 9, 11, 0.7) 60%,
    transparent 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-6);
  transform: translateY(100%);
  transition: transform var(--duration-300) var(--ease-out);
}

.projects__card:hover .projects__modal {
  transform: translateY(0);
}

.projects__badge {
  display: inline-block;
  background: var(--gradient-accent);
  color: #fff;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-3);
}

.projects__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: #fff;
  margin-bottom: var(--space-2);
}

.projects__problem {
  font-size: var(--text-sm);
  color: var(--primary-300);
  font-style: italic;
  margin-bottom: var(--space-2);
}

.projects__description {
  font-size: var(--text-sm);
  color: #fff;
  line-height: 1.5;
  margin-bottom: var(--space-4);
}

.projects__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.projects__button {
  padding: var(--space-2);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  color: #fff;
  transition: all var(--duration-200) var(--ease-out);
  margin-right: var(--space-2);
}

.projects__button:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

/* Skills Section */
.skills {
  padding: var(--space-20) 0;
  background: linear-gradient(135deg, var(--gray-50), var(--gray-100));
  border-radius: var(--radius-3xl);
  margin: 0 var(--space-6);
}

[data-theme="dark"] .skills {
  background: linear-gradient(135deg, var(--gray-900), var(--gray-800));
}

.skills__content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.skills__area {
  background: #fff;
  padding: var(--space-8);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--gray-200);
  transition: all var(--duration-300) var(--ease-out);
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .skills__area {
  background: var(--gray-900);
  border-color: var(--gray-700);
}

.skills__area::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--duration-300) var(--ease-out);
}

.skills__area:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.skills__area:hover::before {
  transform: scaleX(1);
}

.skills__title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--gray-900);
}

.skills__title i {
  font-size: var(--text-2xl);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.skills__box {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.skills__data {
  padding: var(--space-4);
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary-500);
  transition: all var(--duration-200) var(--ease-out);
}

[data-theme="dark"] .skills__data {
  background: var(--gray-800);
}

.skills__data:hover {
  transform: translateX(8px);
  background: var(--primary-50);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .skills__data:hover {
  background: var(--gray-700);
}

.skills__name {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

[data-theme="dark"] .skills__name {
  color: var(--gray-300);
}

.skills__level {
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: 1.5;
}

/* Contact Section */
.contact {
  padding: var(--space-20) 0;
  text-align: center;
}

.contact__description {
  font-size: var(--text-xl);
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: 1.7;
}

.contact__cta {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  background: var(--gradient-accent);
  border: none;
  border-radius: var(--radius-full);
  width: 56px;
  height: 56px;
  cursor: pointer;
  z-index: 100;
  transition: all var(--duration-300) var(--ease-bounce);
  box-shadow: var(--shadow-xl), var(--shadow-primary);
  color: #fff;
  font-size: var(--text-xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  transform: scale(1.1) rotate(180deg);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-toggle__light,
.theme-toggle__dark {
  position: absolute;
  transition: opacity var(--duration-300) var(--ease-out);
}

.theme-toggle__dark {
  opacity: 0;
}

[data-theme="dark"] .theme-toggle__light {
  opacity: 0;
}

[data-theme="dark"] .theme-toggle__dark {
  opacity: 1;
}

/* Footer */
.footer {
  padding: var(--space-12) 0;
}

[data-theme="dark"] .footer__copy {
  color: #fff;
}

.footer__copy {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--gray-500);
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.2;
    transform: scale(1);
  }
  50% {
    opacity: 0.3;
    transform: scale(1.1);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gradient-primary);
}

/* Responsive */
@media (max-width: 768px) {
  .navbar__menu {
    display: none;
  }

  .profile {
    padding-top: calc(var(--space-16) + 72px);
  }

  .profile__border {
    width: 150px;
    height: 150px;
  }

  .profile__intro {
    font-size: var(--text-3xl);
  }

  .profile__value-prop {
    font-size: var(--text-2xl);
  }

  .section__title {
    font-size: var(--text-3xl);
  }

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

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

  .contact__cta {
    flex-direction: column;
    align-items: stretch;
  }

  .theme-toggle {
    width: 48px;
    height: 48px;
    bottom: var(--space-6);
    right: var(--space-6);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }

  .navbar__container {
    padding: 0 var(--space-4);
  }

  .profile__intro {
    font-size: var(--text-2xl);
  }

  .profile__value-prop {
    font-size: var(--text-xl);
  }

  .section__title {
    font-size: var(--text-2xl);
  }

  .skills {
    margin: 0 var(--space-4);
  }
}

/* Focus States for Accessibility */
*:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

button:focus-visible,
a:focus-visible {
  outline-offset: 4px;
}

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

/* Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-600);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  z-index: 9999;
  text-decoration: none;
  border-radius: var(--radius-lg);
}

.skip-link:focus {
  top: var(--space-4);
  left: var(--space-4);
}