/* ===== SHARED LAYOUT - Sidebar + Main Content ===== */

:root {
    --sidebar-bg: #ffffff;
    --sidebar-text: #64748b;
    --sidebar-text-active: #0d9488;
    --sidebar-border: #e2e8f0;
    --sidebar-hover-bg: #f1f5f9;
    --sidebar-width: 250px;
    --sidebar-accent: #0d9488;
}

[data-theme="dark"] {
    --sidebar-bg: #0f1623;
    --sidebar-text: #64748b;
    --sidebar-text-active: #2dd4bf;
    --sidebar-border: #1e293b;
    --sidebar-hover-bg: #141d2f;
    --sidebar-accent: #2dd4bf;
}

/* Body becomes flex layout */
body.has-sidebar {
    display: flex !important;
    padding: 0 !important;
    margin: 0 !important;
    overflow-x: hidden;
}

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed;
    left: 0; top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--sidebar-border);
}

.sidebar-logo {
    width: 40px; height: 40px;
    flex-shrink: 0;
}

.sidebar-logo svg {
    width: 100%;
    height: 100%;
    display: block;
}

.sidebar-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--sidebar-text-active);
    line-height: 1.2;
}

.sidebar-tagline {
    font-size: 0.75rem;
    color: var(--sidebar-text);
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 1rem;
    border-radius: 10px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    transition: color 0.15s, background 0.15s;
    line-height: 1.4;
}

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

.nav-item.active {
    color: var(--sidebar-text-active);
    background: var(--sidebar-hover-bg);
    font-weight: 600;
}

.nav-item .nav-indicator {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #3b82f6;
    margin-left: auto;
}

.nav-item svg { flex-shrink: 0; opacity: 0.7; }
.nav-item.active svg, .nav-item:hover svg { opacity: 1; }

/* ===== SIDEBAR FOOTER ===== */
.sidebar-footer {
    padding: 1rem 0.75rem;
    border-top: 1px solid var(--sidebar-border);
    margin-top: auto;
}

.sidebar-theme-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.65rem 1rem;
    border-radius: 10px;
    border: 1px solid var(--sidebar-border);
    background: var(--sidebar-hover-bg);
    color: var(--sidebar-text);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.15s, background 0.15s;
    font-family: inherit;
}

.sidebar-theme-btn:hover {
    color: var(--sidebar-text-active);
    background: var(--sidebar-border);
}

.sidebar-theme-btn svg { flex-shrink: 0; }

/* ===== MOBILE MENU ===== */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 1rem; left: 1rem;
    width: 44px; height: 44px;
    border-radius: 12px;
    background: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    cursor: pointer;
    z-index: 200;
    align-items: center;
    justify-content: center;
    color: var(--sidebar-text-active);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    position: relative;
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    padding: 2rem 2.5rem;
    max-width: calc(100% - var(--sidebar-width));
    box-sizing: border-box;
    overflow-x: hidden;
}

.main-inner {
    max-width: 1100px;
    margin: 0 auto;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: none;
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 20px rgba(0,0,0,0.3);
    }

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

    .mobile-menu-btn { display: flex; }

    .sidebar.open ~ .mobile-menu-btn { display: none; }

    .main-content {
        margin-left: 0;
        max-width: 100%;
        padding: 1rem;
        padding-top: 4.5rem;
    }
}