/* =============================================
   RESPONSIVE LAYOUT
   Mobile-first adjustments for < 768px
   ============================================= */

/* Hamburger button — hidden on desktop */
.hamburger-btn {
    display: none;
    background: none;
    border: none;
    color: var(--gray-300);
    font-size: 22px;
    padding: 6px 10px;
    cursor: pointer;
    transition: color var(--transition-fast);
    margin-right: 8px;
}

.hamburger-btn:hover {
    color: white;
}

/* Sidebar backdrop — hidden on desktop */
.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    top: var(--header-height);
    background: rgba(0, 0, 0, 0.45);
    z-index: 89;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.sidebar-backdrop.active {
    opacity: 1;
}

/* =========================================
   TABLET  — max 1024px
   ========================================= */
@media (max-width: 1024px) {
    .header-actions .btn-icon:not(.btn-icon-only) span {
        display: none; /* hide text labels, keep icons */
    }

    .header-actions .btn-icon {
        padding: 8px 10px;
    }
}

/* =========================================
   MOBILE  — max 768px
   ========================================= */
@media (max-width: 768px) {

    /* Show hamburger */
    .hamburger-btn {
        display: inline-flex;
    }

    /* Off-canvas sidebar */
    .sidebar {
        position: fixed;
        top: var(--header-height);
        left: 0;
        bottom: 0;
        width: 320px !important;
        z-index: 90;
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        box-shadow: none;
    }

    body.sidebar-open .sidebar {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }

    body.sidebar-open .sidebar-backdrop {
        display: block;
        opacity: 1;
    }

    /* Prevent body scroll when sidebar open */
    body.sidebar-open .app-main {
        overflow: hidden;
    }

    /* Disable expanded mode on mobile */
    body.sidebar-expanded {
        --sidebar-width: 320px;
    }

    .sidebar-expand-btn {
        display: none;
    }

    /* Map takes full width */
    .map-area {
        flex: 1;
        min-width: 0;
    }

    /* Compact header */
    .app-header {
        padding: 0 12px;
    }

    .header-left {
        gap: 12px;
    }

    .logo span {
        display: none;
    }

    .header-stats {
        display: none;
    }

    .header-actions {
        gap: 4px;
    }

    .header-divider {
        margin: 0 4px;
    }

    .header-menu-btn span:not(.header-tool-badge) {
        display: none;
    }

    .header-menu-btn {
        padding: 7px 10px;
    }

    /* Details panel as full-width bottom sheet */
    .details-panel {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        top: auto;
        width: 100% !important;
        max-height: 60vh;
        z-index: 100;
        border-left: none;
        border-top: 1px solid var(--gray-200);
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        box-shadow: var(--shadow-lg);
    }

    /* Map toolbar compact */
    .map-toolbar {
        padding: 8px 12px;
        flex-wrap: wrap;
        gap: 6px;
    }

    .toolbar-group {
        gap: 4px;
    }

    .toolbar-group .btn span {
        display: none;
    }

    /* Map legend compact */
    .map-legend {
        bottom: 10px;
        left: 10px;
        min-width: 140px;
        max-width: 200px;
    }

    .map-controls-panel {
        bottom: 20px;
        right: 6px;
    }

    /* Sidebar tabs compact */
    .sidebar-tab {
        padding: 10px 4px;
        font-size: 9px;
    }

    .sidebar-tab i {
        font-size: var(--text-lg);
    }

    /* Scheduler header compact */
    .scheduler-header {
        padding: 8px 10px;
        gap: 6px;
    }

    .scheduler-week-label {
        min-width: auto;
        font-size: var(--text-sm);
        padding: 4px 10px;
    }

    .sched-header-search {
        margin-left: 0;
        width: 100%;
    }

    .scheduler-actions {
        flex-wrap: wrap;
        gap: 4px;
    }

    .scheduler-actions .btn span {
        display: none;
    }

    /* Scheduler view toggle */
    .sched-view-toggle {
        order: -1;
    }
}

/* =========================================
   SMALL MOBILE  — max 480px
   ========================================= */
@media (max-width: 480px) {

    :root {
        --header-height: 48px;
    }

    .sidebar {
        width: 100vw !important;
    }

    .app-header {
        padding: 0 8px;
    }

    .logo i {
        font-size: 20px;
    }

    .header-actions .btn-icon {
        padding: 6px 8px;
        font-size: var(--text-sm);
    }

    .theme-toggle {
        width: 32px;
        height: 32px;
    }

    /* Full-width modals */
    .modal {
        width: 95vw;
        max-height: 90vh;
        margin: 5vh auto;
    }

    /* Scheduler grid tighter */
    .sched-tech-col {
        min-width: 120px;
    }

    .sched-task-cell {
        min-height: 28px;
        font-size: var(--text-2xs);
    }
}