/* ========================================
   ABBOU ACCOUNTING - Design System
   "The Architectural Ledger"
   ======================================== */

/* === CSS Variables === */
:root {
  /* Colors */
  --background: #131313;
  --surface: #131313;
  --surface-dim: #131313;
  --surface-bright: #393939;
  --surface-container-lowest: #0e0e0e;
  --surface-container-low: #1c1b1b;
  --surface-container: #201f1f;
  --surface-container-high: #2a2a2a;
  --surface-container-highest: #353534;
  --surface-variant: #353534;
  
  --primary: #ffffff;
  --primary-fixed: #5d5f5f;
  --primary-fixed-dim: #454747;
  --primary-container: #d4d4d4;
  
  --secondary: #c7c6c6;
  --secondary-fixed: #c7c6c6;
  --secondary-fixed-dim: #ababab;
  --secondary-container: #464747;
  
  --tertiary: #e4e2e1;
  --tertiary-fixed: #5f5e5e;
  --tertiary-fixed-dim: #474747;
  --tertiary-container: #919090;
  
  --on-background: #e5e2e1;
  --on-surface: #e5e2e1;
  --on-surface-variant: #c6c6c6;
  --on-primary: #1a1c1c;
  --on-primary-container: #000000;
  --on-secondary: #1a1c1c;
  --on-secondary-container: #e3e2e2;
  --on-tertiary: #1b1c1c;
  --on-tertiary-container: #000000;
  
  --outline: #919191;
  --outline-variant: #474747;
  
  --error: #ffb4ab;
  --error-container: #93000a;
  
  /* Typography */
  --font-headline: 'Newsreader', serif;
  --font-body: 'Manrope', sans-serif;
  --font-label: 'Inter', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  --spacing-4xl: 8rem;
  
  /* Border Radius */
  --radius-none: 0px;
  
  /* Transitions */
  --transition-fast: 200ms;
  --transition-base: 300ms;
  --transition-slow: 500ms;
  --transition-slower: 700ms;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background-color: var(--background);
  color: var(--on-surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  max-width: 100vw;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--primary);
}

h1 { font-size: clamp(2.5rem, 8vw, 5rem); }
h2 { font-size: clamp(2rem, 6vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h4 { font-size: clamp(1.25rem, 3vw, 2rem); }
h5 { font-size: clamp(1.125rem, 2.5vw, 1.5rem); }
h6 { font-size: clamp(1rem, 2vw, 1.25rem); }

p {
  margin-bottom: 1rem;
  color: var(--secondary);
}

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

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

/* === Layout === */
.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  overflow-x: hidden;
}

.container-narrow {
  max-width: 960px;
}

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

/* === Navigation === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(19, 19, 19, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(71, 71, 71, 0.2);
}

.navbar__container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  position: relative;
  max-width: 100%;
  overflow: hidden;
}

.navbar__logo {
  display: flex;
  align-items: center;
  z-index: 1001;
}

.navbar__logo img {
  max-height: 50px;
  width: auto;
  object-fit: contain;
}

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

.navbar__link {
  font-family: var(--font-label);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--secondary);
  transition: color var(--transition-base);
  position: relative;
}

.navbar__link:hover,
.navbar__link--active {
  color: var(--primary);
}

.navbar__link--active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--primary);
}

/* === Buttons === */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  font-family: var(--font-label);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
}

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

.btn--primary:hover {
  background: var(--secondary-fixed-dim);
}

.btn--secondary {
  background: transparent;
  color: var(--secondary);
  border: 1px solid var(--outline-variant);
}

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

.btn--full {
  width: 100%;
}

/* === Forms === */
.form-group {
  margin-bottom: var(--spacing-xl);
  position: relative;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--spacing-md) 0;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--primary);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--outline-variant);
  outline: none;
  transition: border-color var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
  border-bottom-color: var(--primary);
}

.form-label {
  position: absolute;
  top: var(--spacing-md);
  left: 0;
  font-family: var(--font-label);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--secondary);
  pointer-events: none;
  transition: all var(--transition-base);
}

.form-input:focus + .form-label,
.form-input:not(:placeholder-shown) + .form-label,
.form-textarea:focus + .form-label,
.form-textarea:not(:placeholder-shown) + .form-label {
  top: -0.5rem;
  font-size: 0.625rem;
  color: var(--primary);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* === Cards === */
.card {
  background: var(--surface-container-low);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

.card:hover {
  background: var(--surface-container-highest);
}

/* === Grid System === */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid--2-cols {
  grid-template-columns: repeat(2, 1fr);
}

.grid--3-cols {
  grid-template-columns: repeat(3, 1fr);
}

.grid--4-cols {
  grid-template-columns: repeat(4, 1fr);
}

/* === Utilities === */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-muted { color: var(--on-surface-variant); }

.bg-surface { background: var(--surface); }
.bg-surface-low { background: var(--surface-container-low); }
.bg-surface-lowest { background: var(--surface-container-lowest); }
.bg-surface-high { background: var(--surface-container-high); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }

.divider {
  width: 4rem;
  height: 1px;
  background: var(--outline-variant);
  margin: var(--spacing-lg) 0;
}

/* === Mobile Menu === */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
  padding: var(--spacing-xs);
  z-index: 1002;
  position: relative;
}

.mobile-menu-btn .material-symbols-outlined {
  font-size: 2rem;
}

.mobile-menu-close {
  display: none;
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: none;
  border: none;
  color: var(--primary);
  font-size: 2rem;
  cursor: pointer;
  z-index: 1003;
}

/* === Responsive === */
@media (max-width: 1024px) {
  .grid--3-cols,
  .grid--4-cols {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-4xl: 6rem;
  }

  /* Prevent all horizontal overflow */
  html, body {
    overflow-x: hidden !important;
  }
  
  body {
    width: 100%;
    max-width: 100vw;
  }

  /* Fix navbar */
  .navbar__container {
    padding: var(--spacing-md);
    width: 100%;
    max-width: 100vw;
  }
  
  .navbar__logo {
    flex-shrink: 0;
    max-width: 70%;
  }
  
  .navbar__logo img {
    max-height: 40px;
  }

  /* Fix mobile menu button */
  .mobile-menu-btn {
    display: block;
    flex-shrink: 0;
    padding: var(--spacing-xs);
  }

  /* Fix mobile menu */
  .navbar__menu {
    display: flex;
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--background);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xl);
    z-index: 999;
    transition: right 0.3s ease;
    overflow: hidden;
  }
  
  .navbar__menu.active {
    right: 0;
  }
  
  .navbar__link {
    font-size: 1.25rem;
    letter-spacing: 0.3em;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .mobile-menu-close {
    display: none;
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: none;
    border: none;
    color: var(--primary);
    font-size: 2rem;
    cursor: pointer;
    z-index: 1003;
  }
  
  .mobile-menu-close.active {
    display: block;
  }
  
  /* Fix hero section overlap */
  .hero {
    padding-top: 100px;
    min-height: 80vh;
  }
  
  .hero__content {
    padding: var(--spacing-2xl);
  }
  
  .hero__cta {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
  }
  
  .hero__title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
  }
  
  .hero__subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
  }
  
  /* Fix all sections for mobile */
  .container {
    padding: 0 var(--spacing-md);
    max-width: 100vw;
  }

  section {
    padding: var(--spacing-3xl) 0;
    max-width: 100vw;
    overflow-x: hidden;
  }
  
  /* Prevent any grid or flex items from overflowing */
  .grid,
  [style*="display: grid"],
  [style*="display:flex"] {
    max-width: 100%;
  }
  
  /* Fix all grids to single column on mobile */
  .grid--2-cols,
  .grid--3-cols,
  .grid--4-cols,
  [style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
  }
  
  /* Prevent images and iframes from overflowing */
  img, iframe {
    max-width: 100%;
    height: auto;
  }
  
  /* Fix buttons and forms */
  .btn {
    white-space: normal;
  }
  
  form {
    max-width: 100%;
  }
  
  .bento-grid {
    grid-template-columns: 1fr !important;
    gap: var(--spacing-lg);
  }
  
  .grid-2col {
    grid-template-columns: 1fr !important;
    gap: var(--spacing-xl);
  }
  
  .grid-3col {
    grid-template-columns: 1fr !important;
    gap: var(--spacing-lg);
  }
  
  /* Fix footer */
  .footer {
    padding: var(--spacing-2xl) 0;
  }
  
  .footer__content {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xl);
  }
  
  .footer__links {
    flex-direction: column;
    gap: var(--spacing-md);
  }
}

/* === Animations === */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease-out;
}

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

::-webkit-scrollbar-track {
  background: var(--surface-container-lowest);
}

::-webkit-scrollbar-thumb {
  background: var(--outline-variant);
}

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

/* === Selection === */
::selection {
  background: var(--primary);
  color: var(--on-primary);
}