/* mobile.css — Safe area insets for notched devices and mobile-specific overrides.
   Component-level responsive styles belong in their respective component CSS files.
   This file contains ONLY cross-cutting mobile concerns that span multiple components. */

/* Safe area insets for notched devices (iPhone X+, etc.)
   Top-axis padding is gated to PWA standalone mode (html.pwa-standalone) because
   apple-mobile-web-app-status-bar-style="black-translucent" only causes the
   Dynamic Island / status-bar collision when launched from the home screen.
   In normal mobile-Safari/Edge tab mode the browser chrome already occupies that
   space, so adding padding-top there would visibly push content down for no gain.
   The CSS variable --safe-area-inset-top is populated by a JS polyfill in app.js
   to work around the known WebKit bug where env(safe-area-inset-top) sometimes
   returns 0px in iOS PWA standalone; env() is kept as the secondary fallback. */
@supports (padding: env(safe-area-inset-top)) {
    .session-tabs-bar {
        padding-left: max(10px, env(safe-area-inset-left));
        padding-right: max(10px, env(safe-area-inset-right));
    }
    html.pwa-standalone .session-tabs-bar {
        padding-top: var(--safe-area-inset-top, env(safe-area-inset-top));
    }
    html.pwa-standalone .file-browser-panel .file-browser-header {
        padding-top: var(--safe-area-inset-top, env(safe-area-inset-top));
    }
    /* Baseline (any env()-capable browser) preserves the long-standing menu
       inset; in tab mode env(safe-area-inset-top) is 0 so this is a no-op,
       but it guards against any non-PWA notched case the standalone rule
       below wouldn't cover. The standalone rule wins by specificity and
       routes through the JS-populated --safe-area-inset-top variable. */
    .mobile-menu {
        padding-top: env(safe-area-inset-top);
    }
    html.pwa-standalone .mobile-menu {
        padding-top: var(--safe-area-inset-top, env(safe-area-inset-top));
    }
    .mode-switcher {
        bottom: max(80px, calc(80px + var(--sa-bottom)));
        right: max(20px, env(safe-area-inset-right));
    }
}

/* Show mode switcher on mobile/touch devices */
@media (max-width: 1024px) and (hover: none) and (pointer: coarse),
       (max-width: 820px) {
    .mode-switcher {
        display: flex;
    }
}

/* Mobile hamburger button (hidden on desktop) */
.hamburger-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    min-width: 44px;
    min-height: 44px;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    margin: 0;
    border-radius: var(--radius-sm);
    -webkit-tap-highlight-color: transparent;
    transition: background-color var(--duration-normal) var(--ease-default);
}

.hamburger-btn:hover {
    background-color: var(--surface-tertiary);
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all var(--duration-slow) var(--ease-default);
}

.hamburger-btn.active .hamburger-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.hamburger-btn.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger-btn.active .hamburger-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* Mobile slide-out menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: -300px;
    width: 280px;
    height: 100%;
    background-color: var(--surface-secondary);
    border-right: 1px solid var(--border-default);
    z-index: var(--z-overlay);
    transition: left var(--duration-slow) var(--ease-default);
    display: flex;
    flex-direction: column;
}

.mobile-menu.active {
    left: 0;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-default);
}

.mobile-menu-header h2 {
    font-size: var(--text-xl);
    font-weight: var(--weight-semibold);
    margin: 0;
}

.close-menu-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 28px;
    cursor: pointer;
    padding: 0;
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-menu-content {
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.mobile-menu-btn {
    padding: var(--space-3) var(--space-4);
    background-color: var(--surface-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: var(--text-md);
    font-weight: var(--weight-medium);
    transition: all var(--duration-normal) var(--ease-default);
    text-align: left;
}

.mobile-menu-btn:hover:not(:disabled) {
    background-color: var(--accent-default);
    color: white;
    border-color: var(--accent-default);
}

.mobile-menu-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.mobile-menu-btn.btn-danger {
    background-color: var(--status-error);
    color: white;
    border-color: var(--status-error);
}

.mobile-menu-btn.btn-danger:hover:not(:disabled) {
    background-color: var(--color-red-600);
    border-color: var(--color-red-600);
}

.desktop-only {
    display: block;
}

/* ── Mobile Breakpoints ── */

/* iPad Mini and below — tab bar, bottom nav, hamburger, mode switcher */
@media (max-width: 820px) {
    .hamburger-btn {
        display: flex;
        flex-shrink: 0;
    }

    .desktop-only {
        display: none !important;
    }

    /* Account for bottom nav height */
    #app {
        padding-bottom: calc(52px + var(--sa-bottom));
    }

    /* Move mode switcher above bottom nav */
    .mode-switcher {
        bottom: calc(62px + var(--sa-bottom));
    }
}

/* Tablets and below — terminal, modal, and layout adjustments */
@media (max-width: 768px) {
    /* Modal adjustments */
    .settings-modal,
    .session-modal,
    .folder-browser-modal {
        padding: 10px;
        align-items: flex-start;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .modal-content {
        width: calc(100% - 20px);
        max-width: none;
        max-height: calc(100vh - 20px);
        margin: 10px;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .folder-browser-content {
        width: calc(100% - 20px);
        max-width: none;
        max-height: calc(100vh - 20px);
        height: auto;
    }

    .modal-header {
        padding: 15px;
        position: sticky;
        top: 0;
        background-color: var(--surface-secondary);
        z-index: 10;
    }

    .modal-body {
        padding: 15px;
    }

    .modal-footer {
        padding: 15px;
        position: sticky;
        bottom: 0;
        background-color: var(--surface-secondary);
        z-index: 10;
        gap: 10px;
    }

    .modal-footer .btn {
        min-height: 44px;
        padding: 12px 20px;
    }

    .folder-list-container {
        max-height: 40vh;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .folder-item {
        min-height: 44px;
        padding: 12px;
    }

    .session-list {
        max-height: 50vh;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .session-item {
        min-height: 44px;
        padding: 10px;
    }

    .close-btn,
    .modal-close {
        position: absolute;
        right: 10px;
        top: 50%;
        transform: translateY(-50%);
    }

    .main {
        flex: 1;
        overflow: hidden;
    }

    .terminal-container {
        padding: 0;
        width: 100%;
        height: 100%;
        overflow: hidden;
    }

    #terminal {
        padding: 8px;
        width: 100%;
        height: 100%;
        box-sizing: border-box;
    }

    .xterm {
        width: 100% !important;
        height: 100% !important;
    }

    .xterm-viewport {
        width: 100% !important;
        overflow-x: hidden !important;
        overflow-y: auto !important;
    }

    .xterm-screen {
        width: 100% !important;
    }

    .overlay-content {
        padding: 20px;
        max-width: 90%;
    }
}

/* ── Keyboard-open: hide bottom nav, tab bar, mode switcher ── */
/* Scoped to mobile viewports to prevent accidental desktop breakage */
@media (max-width: 820px) {
    body.keyboard-open .bottom-nav,
    body.keyboard-open .mode-switcher {
        opacity: 0;
        pointer-events: none;
        height: 0;
        min-height: 0;
        padding: 0;
        border-width: 0;
        overflow: hidden;
        transition: opacity 0.2s ease, height 0.2s ease, padding 0.2s ease, border-width 0.2s ease;
    }
    body.keyboard-open .session-tabs-bar {
        height: 0;
        min-height: 0;
        overflow: hidden;
        padding: 0;
        border-width: 0;
        opacity: 0;
        transition: opacity 0.2s ease, height 0.2s ease, padding 0.2s ease, border-width 0.2s ease;
    }
    body.keyboard-open #app {
        padding-bottom: 0 !important;
    }
}

/* Extra small devices (phones in portrait) */
@media (max-width: 480px) {
    .btn {
        padding: 8px 12px;
        font-size: 11px;
    }

    #terminal {
        padding: 4px;
    }

    .modal-content {
        max-height: 85vh;
        overflow-y: auto;
    }

    .main {
        padding: 0;
        margin: 0;
    }

    body {
        overflow-x: hidden;
    }
}