/* ============================================
   FRIDAY – Layout: Sidebar, Header, Content
   ============================================ */

/* --- Intro Overlay --- */
.intro-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

/* Google Apps Button */
.google-apps-btn {
    position: absolute;
    top: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-tertiary);
    transition: all var(--transition-fast);
    z-index: 1010;
    background: transparent;
}

.google-apps-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.intro-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.intro-content {
    text-align: center;
    max-width: 680px;
    padding: var(--space-8);
}

.intro-logo {
    margin-bottom: var(--space-6);
    display: inline-block;
}

.intro-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.intro-tagline {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    font-weight: 400;
}

.intro-description {
    font-size: var(--font-size-base);
    color: var(--text-tertiary);
    line-height: 1.7;
    margin-bottom: var(--space-10);
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

.intro-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
    margin-bottom: var(--space-10);
}

.intro-feature-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-6) var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.intro-feature-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.intro-feature-card .feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.intro-feature-card span {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.intro-cta {
    font-size: var(--font-size-md);
    padding: var(--space-4) var(--space-8);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

/* --- App Layout --- */
.app-layout {
    display: flex;
    min-height: 100vh;
    transition: opacity var(--transition-slow);
}

.app-layout.hidden {
    display: none;
}

/* --- Sidebar --- */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    transition: transform var(--transition-base);
}

.sidebar-header {
    padding: var(--space-5) var(--space-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-light);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.sidebar-brand {
    font-size: var(--font-size-md);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.sidebar-close-btn {
    display: none;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.sidebar-close-btn:hover {
    color: var(--text-primary);
}

.sidebar-nav {
    padding: var(--space-3) var(--space-3);
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    margin-bottom: 2px;
}

.nav-item:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--accent-light);
    color: var(--accent-dark);
}

.nav-item.active svg {
    stroke: var(--accent-dark);
}

.nav-divider {
    height: 1px;
    background: var(--border-light);
    margin: var(--space-3) var(--space-4);
}

/* --- Sidebar Overlay (mobile) --- */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    z-index: 99;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.sidebar-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* --- Main Wrapper --- */
.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- Top Header --- */
.top-header {
    height: var(--header-height);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: 0 var(--space-6);
    background: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 50;
}

.hamburger-btn {
    display: none;
    padding: var(--space-2);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.hamburger-btn:hover {
    color: var(--text-primary);
}

.page-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    flex: 1;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.icon-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.icon-btn.active {
    background: var(--accent-light);
    color: var(--accent-dark);
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    padding: var(--space-8);
    max-width: 960px;
    width: 100%;
    margin: 0 auto;
}

/* --- Footer --- */
.app-footer {
    padding: var(--space-6);
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    border-top: 1px solid var(--border-light);
}

/* --- Bottom Nav (mobile) --- */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: var(--bg-primary);
    border-top: 1px solid var(--border-light);
    z-index: 90;
    justify-content: space-around;
    align-items: center;
    padding: 0 var(--space-2);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast);
}

.bottom-nav-item.active {
    color: var(--accent-dark);
}

.bottom-nav-item:hover {
    color: var(--text-primary);
}