/* =============================================
   AYONETE ICHA - Portfolio Website
   Base Styles & Design System
   ============================================= */

/* CSS Custom Properties (Design Tokens) */
:root {
  /* Colors */
  --color-bg: #000000;
  --color-primary: #FFE600;
  --color-text: #FFFFFF;
  --color-text-muted: #999999;
  --color-accent-blue: #3B82F6;

  /* Typography */
  --font-display: 'Bebas Neue', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;

  /* Layout */
  --nav-height: 80px;
  --container-max: 1400px;
  --container-padding: 2rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(3rem, 8vw, 6rem); }
h2 { font-size: clamp(2rem, 5vw, 4rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.5rem); }

p {
  font-size: 1rem;
  line-height: 1.7;
}

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

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

/* Utility Classes */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

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

.text-muted {
  color: var(--color-text-muted);
}

.highlight {
  background-color: var(--color-primary);
  color: var(--color-bg);
  padding: 0 0.25em;
}

/* =============================================
   Navigation
   ============================================= */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--container-padding);
  z-index: 1000;
  background: linear-gradient(to bottom, rgba(0,0,0,0.8) 0%, transparent 100%);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  flex-shrink: 0;
}

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

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

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav__links-right {
  margin-left: auto;
}

.nav__link {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

.nav__link--active {
  color: var(--color-text);
}

.nav__playground {
  color: var(--color-primary);
}

/* Mobile Navigation */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav__toggle span {
  width: 25px;
  height: 2px;
  background-color: var(--color-text);
  transition: var(--transition-base);
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transform: none;
    background-color: var(--color-bg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
  }

  .nav__links.active {
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    font-size: 1.5rem;
  }

  .nav__links-right {
    display: none;
  }
}

/* =============================================
   Main Content Area
   ============================================= */
.main {
  padding-top: var(--nav-height);
  min-height: 100vh;
}

/* Page Header */
.page-header {
  text-align: center;
  padding: var(--space-2xl) 0;
}

.page-header__title {
  text-transform: uppercase;
}

/* =============================================
   Buttons
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 2px solid var(--color-text);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: var(--transition-base);
}

.btn:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-bg);
}

.btn--primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-bg);
}

.btn--primary:hover {
  background-color: transparent;
  color: var(--color-primary);
}

/* =============================================
   Decorative Elements
   ============================================= */
.deco-circle {
  position: fixed;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background-color: var(--color-accent-blue);
  pointer-events: none;
  z-index: -1;
}

.deco-circle--left {
  top: 100px;
  left: -150px;
}

/* =============================================
   Scrollbar Styling
   ============================================= */
::-webkit-scrollbar {
  width: 8px;
}

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

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

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

/* =============================================
   Loading State
   ============================================= */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
}

.loading__spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-text-muted);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}