/* ========== LAYOUT ========== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Mobile header - hidden on desktop */
.mobile-header {
    display: none;
}

.mobile-overlay {
    display: none;
}

/* ========== SIDEBAR ========== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-white);
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    padding: 32px 0;
    transition: transform 0.3s ease;
}

.sidebar.collapsed {
    transform: translateX(-100%);
}

.sidebar-toggle {
    position: fixed;
    left: 260px;
    top: 20px;
    width: 36px;
    height: 36px;
    background: var(--bg-white);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 101;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.sidebar-toggle:hover {
    background: rgba(181, 101, 118, 0.08);
}

.sidebar.collapsed ~ .sidebar-toggle {
    left: 20px;
}

.sidebar-toggle svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-gray);
    transition: transform 0.3s ease;
}

.sidebar.collapsed ~ .sidebar-toggle svg {
    transform: rotate(180deg);
}

.sidebar-branding {
    padding: 0 24px 40px;
    width: 100%;
}

.sidebar-logo {
    display: block;
}

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

.sidebar-nav {
    flex: 1;
    padding: 24px 0;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 4px;
}

.sidebar-nav a {
    display: block;
    padding: 10px 24px;
    font-size: 14px;
    color: var(--text-gray);
    transition: all 0.2s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--dusty-rose-action);
}

.sidebar-footer {
    padding: 24px 24px 0;
}

.sidebar-footer a {
    display: block;
    padding: 10px 0;
    font-size: 13px;
    color: var(--text-gray);
    transition: color 0.2s;
}

.sidebar-footer a:hover {
    color: var(--dusty-rose-action);
}

/* ========== MAIN CONTENT ========== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    width: calc(100% - var(--sidebar-width));
    transition: margin-left 0.3s ease, width 0.3s ease;
}

.sidebar.collapsed ~ .main-content {
    margin-left: 0;
    width: 100%;
}

/* ========== TAB SYSTEM ========== */
.tab-content {
    display: none;
    padding: 64px;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

.tab-title {
    font-family: 'Syne', sans-serif;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: -0.01em;
    color: var(--blue-authority);
}

.tab-desc {
    font-size: 16px;
    color: var(--text-gray);
    margin-bottom: 48px;
    line-height: 1.6;
}

/* ========== GRIDS ========== */
.feature-cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.contact-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 64px;
    max-width: 1200px;
    margin: 0 auto;
}