/* ==========================================================================
   Idgie Kagan Portfolio - Main Styles
   ========================================================================== */

/* Design System Variables
   ========================================================================== */

:root {
  /* Primary Colors */
  --color-black: #1a1a1a;
  --color-white: #ffffff;
  --color-gray-900: #2d2d2d;
  --color-gray-700: #4a4a4a;
  --color-gray-500: #767676;
  --color-gray-300: #d4d4d4;
  --color-gray-100: #f5f5f5;

  /* Accent Color */
  --color-accent: #e74c3c;

  /* Functional Colors */
  --color-success: #27ae60;
  --color-error: #e74c3c;
  --color-info: #3498db;

  /* Font Families */
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Courier New', monospace;

  /* Font Sizes */
  --fs-xs: 0.75rem;    /* 12px */
  --fs-sm: 0.875rem;   /* 14px */
  --fs-base: 1rem;     /* 16px */
  --fs-lg: 1.125rem;   /* 18px */
  --fs-xl: 1.25rem;    /* 20px */
  --fs-2xl: 1.5rem;    /* 24px */
  --fs-3xl: 2rem;      /* 32px */
  --fs-4xl: 2.5rem;    /* 40px */
  --fs-5xl: 3rem;      /* 48px */

  /* Line Heights */
  --lh-tight: 1.2;
  --lh-base: 1.6;
  --lh-loose: 1.8;

  /* Spacing System */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 3rem;     /* 48px */
  --space-3xl: 4rem;     /* 64px */
  --space-4xl: 6rem;     /* 96px */

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-base: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  /* Container */
  --container-max: 1600px;
  --container-padding: var(--space-xl);
}

/* Reset & Base Styles
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 80px; /* Account for fixed nav */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Optimize scrolling performance */
@supports (scrollbar-width: thin) {
  * {
    scrollbar-width: thin;
    scrollbar-color: var(--color-gray-500) var(--color-gray-100);
  }
}

/* Webkit scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-gray-500);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-700);
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-gray-900);
  background-color: var(--color-white);
  overflow-x: hidden;
  margin: 0;
  padding: 0;
  width: 100%;
}

/* Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: var(--lh-tight);
  margin-bottom: var(--space-lg);
  color: var(--color-black);
}

h1 {
  font-size: var(--fs-5xl);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--fs-4xl);
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--fs-3xl);
}

h4 {
  font-size: var(--fs-2xl);
}

h5 {
  font-size: var(--fs-xl);
}

h6 {
  font-size: var(--fs-lg);
}

p {
  margin-bottom: var(--space-lg);
}

a {
  color: var(--color-black);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Layout Components
   ========================================================================== */

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

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

.section-title {
  text-align: center;
  margin-bottom: var(--space-3xl);
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 2px;
  background-color: var(--color-accent);
  margin: var(--space-lg) auto 0;
}

/* Navigation
   ========================================================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: transparent;
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
  padding: var(--space-lg) 0;
}

.nav.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: 400;
  color: var(--color-black);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-xl);
  align-items: center;
}

.nav-link {
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  position: relative;
  padding: var(--space-sm) 0;
}

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

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

/* Mobile Menu Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--color-black);
  transition: all var(--transition-base);
}

/* Buttons
   ========================================================================== */

.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-align: center;
  border: 2px solid var(--color-black);
  background-color: transparent;
  color: var(--color-black);
  cursor: pointer;
  transition: all var(--transition-base);
  border-radius: var(--radius-sm);
}

.btn:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.3);
  padding: 1rem 2.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
}

.btn-primary:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.btn-accent:hover {
  background-color: #c0392b;
  border-color: #c0392b;
}

/* Forms
   ========================================================================== */

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-gray-700);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  color: var(--color-gray-900);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-base);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-black);
  box-shadow: 0 0 0 3px rgba(26, 26, 26, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-error {
  color: var(--color-error);
  font-size: var(--fs-sm);
  margin-top: var(--space-xs);
}

/* Footer
   ========================================================================== */

.footer {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-section h3 {
  color: var(--color-text-primary);
  font-size: var(--fs-lg);
  margin-bottom: var(--space-lg);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: var(--fs-sm);
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-social {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
}

.footer-social a:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg-primary);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: var(--fs-sm);
  color: var(--color-text-tertiary);
}

/* Utility Classes
   ========================================================================== */

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.hidden {
  display: none;
}

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

/* Accessibility
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}