/* ============================================
   CSS RESET
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

/* ============================================
   ROOT & BODY
   ============================================ */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  background: var(--color-bg);
  color: var(--color-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ============================================
   MAIN LAYOUT
   ============================================ */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-5);
  padding-top: calc(72px + var(--space-6));
  min-height: 100vh;
}

/* ============================================
   LINKS
   ============================================ */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

/* ============================================
   BUTTONS
   ============================================ */
button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

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

/* ============================================
   FORM ELEMENTS
   ============================================ */
select {
  font: inherit;
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  padding-right: var(--space-6);
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%237c7872' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-2) center;
}

select:hover {
  border-color: var(--color-text-tertiary);
}

select:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px var(--color-accent-primary-subtle);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"] {
  font: inherit;
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  width: 100%;
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

input[type="text"]:hover,
input[type="email"]:hover,
input[type="password"]:hover,
input[type="search"]:hover {
  border-color: var(--color-text-tertiary);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="search"]:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px var(--color-accent-primary-subtle);
}

input::placeholder {
  color: var(--color-text-tertiary);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1 {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
}

h2 {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
}

h3 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
}

h4 {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  line-height: var(--leading-snug);
}

p {
  line-height: var(--leading-relaxed);
}

small {
  font-size: var(--text-sm);
}

/* ============================================
   UTILITY: TABULAR NUMBERS
   ============================================ */
.tabular-nums {
  font-variant-numeric: tabular-nums;
}

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

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-400);
}

@media (prefers-color-scheme: dark) {
  ::-webkit-scrollbar-thumb {
    background: var(--color-gray-600);
  }

  ::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
  }
}

/* ============================================
   SELECTION
   ============================================ */
::selection {
  background: var(--color-accent-primary-subtle);
  color: var(--color-text-primary);
}