:root {
  --bg-primary: #ffffff;
  --text-primary: #1a1a1a;
  --accent-color-1: #00a2d2;
  --accent-color-2: #0066cc;
  --accent-color-3: #33ccff;
  --accent-hover: #0088b3;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 10px rgba(0, 0, 0, 0.07);
  --shadow-xl: 0 20px 20px rgba(0, 0, 0, 0.09);
  --radius-container: 4px;
  --radius-small: 2px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --container-bg-1: #667eea;
  --container-bg-2: #f093fb;
  --container-bg-3: #4facfe;
}

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.header {
  background: rgba(255, 255, 255, 0.95);
  padding: var(--spacing-lg) var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  align-items: center;
  max-width: 1500px;
  margin: 0 auto;
  width: 100%;
}

.header-accent {
  width: 80px;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--accent-color-1) 50%,
    transparent 100%
  );
  opacity: 0.6;
}

.header-accent:last-child {
  transform: scaleX(-1);
}

.logo-img {
  height: 48px;
  width: auto;
  display: block;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

.main-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl) var(--spacing-lg);
  min-height: calc(100vh - 200px);
}

.container-wrapper {
  display: flex;
  gap: var(--spacing-lg);
  width: 100%;
  max-width: 1500px;
  height: 600px;
}

.container {
  flex: 1;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-radius: var(--radius-container);
  padding: var(--spacing-xl);
  cursor: pointer;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
}

.container::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.8) 0%,
    rgba(0, 0, 0, 0.6) 25%,
    rgba(0, 0, 0, 0.4) 50%,
    rgba(0, 0, 0, 0.2) 75%,
    rgba(0, 0, 0, 0) 100%
  );
  z-index: 0;
  transition: all 0.5s ease;
}

.container:hover::after {
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.9) 0%,
    rgba(0, 0, 0, 0.75) 25%,
    rgba(0, 0, 0, 0.55) 50%,
    rgba(0, 0, 0, 0.3) 75%,
    rgba(0, 0, 0, 0.1) 100%
  );
}

.container > * {
  position: relative;
  z-index: 1;
}

.container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--accent-color-1),
    var(--accent-color-2)
  );
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
  z-index: 2;
  border-radius: var(--radius-container) var(--radius-container) 0 0;
}

.container:nth-child(1) {
  background-color: var(--container-bg-1);
  background-image: url("imgs/writing.jpg");
}

.container:nth-child(1)::before {
  background: linear-gradient(
    90deg,
    var(--accent-color-1),
    var(--accent-color-2)
  );
}

.container:nth-child(2) {
  background-color: var(--container-bg-2);
  background-image: url("imgs/coding-man.jpg");
}

.container:nth-child(2)::before {
  background: linear-gradient(
    90deg,
    var(--accent-color-2),
    var(--accent-color-3)
  );
}

.container:nth-child(3) {
  background-color: var(--container-bg-3);
  background-image: url("imgs/graph.jpg");
}

.container:nth-child(3)::before {
  background: linear-gradient(
    90deg,
    var(--accent-color-3),
    var(--accent-color-1)
  );
}

.container:hover {
  flex: 2;
  transform: translateY(-12px);
  box-shadow: var(--shadow-xl);
}

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

.container:hover .hidden-content {
  opacity: 1;
  transform: translateY(0);
  max-height: 600px;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--bg-primary);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.subtitle {
  font-size: 1.125rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
  text-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
}

.hidden-content {
  opacity: 0;
  transform: translateY(20px);
  max-height: 0;
  overflow: hidden;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.description {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.cta-text {
  display: inline-block;
  margin-top: var(--spacing-md);
  font-weight: 600;
  font-size: 1rem;
  color: var(--bg-primary);
  background-color: var(--accent-color-1);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-small);
  transition: all 0.3s ease;
  letter-spacing: 0.01em;
}

.container:hover .cta-text {
  background-color: var(--accent-hover);
  transform: translateX(4px);
}

.footer {
  background: linear-gradient(
    135deg,
    var(--accent-color-1) 0%,
    var(--accent-color-2) 100%
  );
  color: white;
  padding: var(--spacing-2xl) var(--spacing-xl) var(--spacing-lg);
  margin-top: auto;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-evenly;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.footer-section h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.footer-section p {
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-xs);
  opacity: 0.95;
}

.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.875rem;
  opacity: 0.85;
  letter-spacing: 0.01em;
}

@media (max-width: 1024px) {
  .container-wrapper {
    flex-direction: column;
    height: auto;
    gap: var(--spacing-md);
  }

  .container {
    height: 300px;
    min-height: 300px;
  }

  .container:hover {
    flex: 1;
    height: auto;
    min-height: 300px;
  }

  .container .hidden-content {
    opacity: 1;
    transform: translateY(0);
    max-height: none;
    overflow: visible;
  }

  .header {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .main-content {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  h2 {
    font-size: 1.75rem;
  }

  .container::after {
    background: rgba(0, 0, 0, 0.4);
  }
}

@media (max-width: 768px) {
  .header {
    padding: var(--spacing-md);
  }

  .main-content {
    padding: var(--spacing-lg) var(--spacing-md);
    min-height: auto;
  }

  .container-wrapper {
    gap: var(--spacing-md);
  }

  .container {
    height: auto;
    min-height: 280px;
    padding: var(--spacing-lg);
  }

  .container:hover {
    flex: 1;
    transform: none;
    height: auto;
    min-height: 280px;
  }

  .container:hover .hidden-content,
  .container .hidden-content {
    opacity: 1;
    transform: translateY(0);
    max-height: none;
  }

  h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
  }

  .subtitle {
    font-size: 1rem;
  }

  .description {
    font-size: 0.9375rem;
  }

  .footer {
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-lg);
  }

  .footer-section {
    width: 100%;
  }

  .footer-section h3 {
    font-size: 1.25rem;
  }

  .footer-section h4 {
    font-size: 1rem;
  }

  .header-decoration {
    width: 40px;
    opacity: 0.4;
  }
}