/* Сброс, типографика, базовый каркас приложения. */

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

html,
body {
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    min-height: 100dvh;
    font-family: var(--font-sans);
    font-size: var(--fs-md);
    line-height: var(--lh-normal);
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

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

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

button {
    font: inherit;
    color: inherit;
    background: transparent;
    border: 0;
    padding: 0;
    cursor: pointer;
}

img,
svg {
    display: block;
    max-width: 100%;
}

input,
select,
textarea {
    font: inherit;
    color: inherit;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-weight: var(--fw-bold);
    line-height: var(--lh-tight);
    letter-spacing: -0.01em;
}

p {
    margin: 0;
}

ul, ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

hr {
    border: 0;
    height: 1px;
    background: var(--color-line);
    margin: var(--space-4) 0;
}

::selection {
    background: var(--accent-soft);
    color: var(--color-text);
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-line-strong);
    border-radius: var(--radius-pill);
    border: 2px solid transparent;
    background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
    background: color-mix(in srgb, var(--accent) 40%, var(--color-line-strong));
    background-clip: padding-box;
    border: 2px solid transparent;
}

/* ================== Базовый каркас ================== */

.app-shell {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    min-height: 100dvh;
}

.app-shell--collapsed {
    grid-template-columns: var(--sidebar-collapsed-width) 1fr;
}

.app-shell--auth {
    display: block;
    min-height: 100dvh;
}

.app-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.app-main__content {
    flex: 1 1 auto;
    width: 100%;
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: var(--space-6) var(--space-6) calc(var(--space-8) + var(--safe-bottom));
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

/* ================== Утилитарные классы (минимум) ================== */

.stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}
.stack--sm { gap: var(--space-2); }
.stack--lg { gap: var(--space-5); }
.stack--xl { gap: var(--space-7); }

.row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}
.row--between { justify-content: space-between; }
.row--end { justify-content: flex-end; }
.row--nowrap { flex-wrap: nowrap; }

.grid {
    display: grid;
    gap: var(--space-4);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }

.text-muted { color: var(--color-text-muted); }
.text-soft  { color: var(--color-text-soft); }
.text-accent { color: var(--accent); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger  { color: var(--color-danger); }

.text-xs { font-size: var(--fs-xs); }
.text-sm { font-size: var(--fs-sm); }
.text-md { font-size: var(--fs-md); }
.text-lg { font-size: var(--fs-lg); }
.text-xl { font-size: var(--fs-xl); }

.fw-medium   { font-weight: var(--fw-medium); }
.fw-semibold { font-weight: var(--fw-semibold); }
.fw-bold     { font-weight: var(--fw-bold); }
.fw-black    { font-weight: var(--fw-black); }

.uppercase { text-transform: uppercase; letter-spacing: 0.08em; }
.tabular   { font-variant-numeric: tabular-nums; }
.truncate  { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.no-wrap   { white-space: nowrap; }

.hidden { display: none !important; }
.visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0, 0, 0, 0);
    white-space: nowrap; border: 0;
}

.spacer { flex: 1 1 auto; }

/* ================== Responsive ================== */

@media (max-width: 980px) {
    .app-shell {
        grid-template-columns: 1fr !important;
    }

    .app-main__content {
        padding: var(--space-4) var(--space-3) calc(var(--space-6) + var(--bottom-tabs-height) + var(--safe-bottom));
        gap: var(--space-4);
    }

    .grid--2,
    .grid--3,
    .grid--4 {
        grid-template-columns: 1fr;
    }

    body[data-role="auth"] .app-main__content,
    body[data-role="public"] .app-main__content {
        padding-bottom: var(--safe-bottom);
    }
}