/* =========================
   Root Variables
   ========================= */
:root {
  --color-bg: #ffffff;
  --color-text: #111111;
  --color-text-secondary: #444444;
  --color-border: #e0e0e0;
  --color-accent: #111111;
  --color-accent-hover: #333333;

  --font-base: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --max-width: 1100px;
  --spacing: 1rem;
  --radius: 4px;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html, body {
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: var(--font-base);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

/* =========================
   Header & Navigation
   ========================= */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing) calc(var(--spacing) * 2);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-text);
}

.site-nav ul {
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  transition: color var(--transition-fast);
}

.site-nav a:hover {
  color: var(--color-text-secondary);
}

/* =========================
   Main App
   ========================= */
main#app {
  flex: 1;
  max-width: var(--max-width);
  margin: 2rem auto;
  padding: 0 calc(var(--spacing) * 2);
  position: relative;
  min-height: 60vh;
}

/* =========================
   Hero Section
   ========================= */
.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.hero-content {
  flex: 1 1 400px;
}

.hero-content h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.hero-content p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: var(--color-text-secondary);
}

.hero-content button {
  background-color: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.hero-content button:hover {
  background-color: var(--color-accent-hover);
}

.hero-visual {
  flex: 1 1 300px;
  display: flex;
  justify-content: center;
}

.floating-img {
  width: 250px;
  animation: float 3s ease-in-out infinite;
}

/* Floating animation */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-15px);
  }
}

/* =========================
   Generic Section Styles
   ========================= */
section {
  margin-bottom: 3rem;
}

section h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

section p {
  color: var(--color-text-secondary);
}

/* =========================
   Footer
   ========================= */
.site-footer {
  border-top: 1px solid var(--color-border);
  text-align: center;
  padding: var(--spacing);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
}

/* =========================
   Page Transition Animations
   ========================= */
.fade-enter {
  opacity: 0;
  transform: translateY(10px);
}

.fade-enter-active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

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

.fade-exit-active {
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}