/* ==========================================================================
   Zenith Focus - Base Styles & Reset
   ========================================================================== */

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

html {
  font-size: 62.5%; /* 1rem = 10px */
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: 1.4rem;
  line-height: 1.5;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  transition: background-color var(--transition-slow), color var(--transition-normal);
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Accessible hidden utility */
.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;
}

/* Button & input resets */
button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
  border: none;
  background: none;
}

button {
  cursor: pointer;
  user-select: none;
  touch-action: manipulation;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--mode-accent);
  outline-offset: 2px;
}

/* Container */
.app-container {
  width: 100%;
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Custom Scrollbar for inner sheets */
::-webkit-scrollbar {
  width: 0.6rem;
  height: 0.6rem;
}

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

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

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