body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background-color: var(--color-bg);
}

/* ========================================
   PUBLIC LAYOUT (landing, auth pages)
   ======================================== */
.public-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.public-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.public-nav__logo {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.public-nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.public-content {
    flex: 1;
}

/* ========================================
   DASHBOARD LAYOUT (authenticated pages)
   ======================================== */
.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Top bar */
.app-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--space-lg);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-topbar__left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.app-topbar__logo {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text); /* dark on mobile; turns brand color on desktop */
}

/* Credits + name are hidden on mobile (no room) — shown from 768px up */
.app-topbar__right {
    display: none;
    align-items: center;
    gap: var(--space-lg);
}

.app-topbar__credits {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

.app-topbar__user {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Hamburger menu button (mobile only) */
.menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.menu-toggle:hover {
    background: var(--color-bg);
}

.menu-toggle svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-text);
}

/* Sidebar container */
.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-logo {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.sidebar-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    font-size: var(--font-size-2xl);
    color: var(--color-text-muted);
    cursor: pointer;
    background: none;
    border: none;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-md);
    overflow-y: auto;
}

.sidebar-section {
    margin-top: var(--space-lg);
}

.sidebar-section__title {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    margin-bottom: 2px;
}

.sidebar-link:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.sidebar-link.is-active {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.sidebar-link svg {
    flex-shrink: 0;
}

.sidebar-badge {
    margin-left: auto;
    background: var(--color-primary);
    color: #fff;
    font-size: var(--font-size-xs);
    padding: 0.1rem 0.5rem;
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-semibold);
}

.sidebar-footer {
    padding: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.sidebar-link--logout {
    color: var(--color-danger);
}

.sidebar-link--logout:hover {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

/* Sidebar panel */
.app-sidebar {
    display: none;
    flex-direction: column;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    width: 280px;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 200;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform var(--transition-base);
}

.app-sidebar.is-open {
    display: flex;
    transform: translateX(0);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 199;
}

.sidebar-overlay.is-active {
    display: block;
}

/* Main content */
.app-main {
    flex: 1;
    padding: var(--space-lg);
    min-height: calc(100vh - var(--header-height));
}

/* ========================================
   TABLET AND UP (768px+)
   ======================================== */
@media (min-width: 768px) {
    .app-layout {
        flex-direction: row;
        padding-top: var(--header-height);
    }

    .app-topbar {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
    }

    .menu-toggle {
        display: none;
    }

    /* Restore brand color + show credits/name on desktop */
    .app-topbar__logo {
        color: var(--color-primary);
    }

    .app-topbar__right {
        display: flex;
    }

    .sidebar-close {
        display: none;
    }

    /* Brand is in the top bar on desktop, so the (now empty) sidebar header is hidden */
    .sidebar-header {
        display: none;
    }

    .app-sidebar {
        display: flex;
        position: sticky;
        top: var(--header-height);
        height: calc(100vh - var(--header-height));
        width: var(--sidebar-width);
        transform: none;
        z-index: 1;
    }

    .sidebar-overlay {
        display: none !important;
    }

    .app-main {
        flex: 1;
        padding: var(--space-xl);
        max-width: calc(100% - var(--sidebar-width));
    }
}

/* ========================================
   LARGE DESKTOP (1280px+)
   ======================================== */
@media (min-width: 1280px) {
    .app-main {
        padding: var(--space-2xl);
    }
}

/* ========================================
   GENERAL UTILITIES
   ======================================== */
.container {
    width: 100%;
    max-width: var(--max-content-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.page-header {
    margin-bottom: var(--space-xl);
}

.page-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
}

.page-header p {
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

.grid {
    display: grid;
    gap: var(--space-lg);
}

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

@media (min-width: 576px) {
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.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-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }