/* This file is part of Nokia HEIF library
 *
 * Copyright (c) 2015-2026 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
 *
 * Contact: heif@nokia.com
 *
 * This software, including documentation, is protected by copyright controlled by Nokia Corporation and/ or its subsidiaries. All rights are reserved.
 *
 * Copying, including reproducing, storing, adapting or translating, any or all of this material requires the prior written consent of Nokia.
 */

/* Mobile Responsive Styles for HEIF Website
 * Breakpoints:
 * - 768px: Tablet and below - hamburger menu activates
 * - 576px: Mobile phones
 * - 400px: Small phones
 */

/* ===================================
   SAFE AREA INSETS (notch / Dynamic Island / home bar)
   =================================== */

:root {
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
}

/* ===================================
   REDUCED MOTION
   =================================== */

@media (prefers-reduced-motion: reduce) {
    .mobile-menu-toggle span,
    .heif-nav-items,
    .mobile-dropdown-content,
    .mobile-dropdown-header::after,
    .gallery-modal-content,
    .gallery-modal-info-panel,
    .gallery-modal-full-info,
    .hdr-tooltip-bubble,
    .heif-nav-container,
    .mobile-menu-overlay {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}

/* ===================================
   SCROLLBAR HIDING FOR TOUCH STRIPS
   =================================== */

@media (max-width: 768px) {
    .gallery-burst-strip,
    .gallery-collection-strip {
        scrollbar-width: none; /* Firefox */
        -ms-overflow-style: none; /* IE/Edge */
    }
    .gallery-burst-strip::-webkit-scrollbar,
    .gallery-collection-strip::-webkit-scrollbar {
        display: none; /* Chrome / Safari */
    }
}

/* ===================================
   PREVENT UNWANTED TOUCH BEHAVIORS
   =================================== */

@media (max-width: 768px) {
    /* Prevent text selection on interactive elements - but allow touch scrolling */
    button, 
    a, 
    .gallery-item,
    .gallery-modal-quit,
    .mobile-menu-toggle,
    .mobile-dropdown-header,
    .heif-nav-title,
    .heif-example-content {
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
        -webkit-touch-callout: none; /* Disable iOS callout menu */
        /* Allow vertical scrolling through these elements */
        touch-action: pan-y;
    }
    
    /* Images/canvases need special handling for context menu long-press */
    canvas,
    .gallery-item canvas,
    .gallery-item img {
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
        -webkit-touch-callout: none;
        /* manipulation allows pan and pinch-zoom but disables double-tap zoom */
        touch-action: manipulation;
    }

    /* Modal images/canvases — no panning allowed */
    .gallery-modal-content img,
    .gallery-modal-content canvas {
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
        -webkit-touch-callout: none;
        touch-action: none;
    }

    /* Burst/collection strip thumbnails need horizontal scroll */
    .gallery-burst-strip canvas,
    .gallery-collection-strip canvas {
        touch-action: pan-x;
    }
}

/* Landscape: burst/collection strips are vertical, need pan-y */
@media (max-width: 900px) and (orientation: landscape) {
    .gallery-burst-strip,
    .gallery-burst-strip canvas,
    .gallery-collection-strip,
    .gallery-collection-strip canvas {
        touch-action: pan-y !important;
    }
}

@media (max-width: 768px) {
    
    /* Lock modal layers on mobile — prevent all touch-scroll / drag */
    .gallery-modal-window.visible,
    .gallery-modal-backdrop.visible {
        overflow: hidden;
        touch-action: none;
        overscroll-behavior: none;
    }

    .gallery-modal-window.visible .gallery-modal-content {
        touch-action: none;
    }

    .gallery-modal-window.visible .gallery-modal-header {
        touch-action: none;
    }

    /* Re-enable horizontal scroll on strips inside the modal */
    .gallery-modal-window.visible .gallery-burst-strip,
    .gallery-modal-window.visible .gallery-collection-strip {
        touch-action: pan-x;
    }

    /* Re-enable vertical scroll on grid and full-info panel */
    .gallery-modal-window.visible .gallery-modal-grid,
    .gallery-modal-window.visible .gallery-modal-full-info {
        touch-action: pan-y;
    }

    /* Prevent pull-to-refresh and overscroll effects on main containers */
    body.modal-open,
    .heif-examples-modal-window.display {
        overscroll-behavior: contain;
    }
    
    /* Remove tap highlight on iOS/Android */
    .gallery-item,
    .gallery-modal-content,
    button,
    a {
        -webkit-tap-highlight-color: transparent;
    }
    
    /* Allow text selection in actual content areas */
    p, li, span, h1, h2, h3, h4, h5, h6,
    .heif-about-content-info,
    .heif-technical-content,
    .heif-news-content,
    .heif-comparison-content-text {
        -webkit-user-select: text;
        -moz-user-select: text;
        -ms-user-select: text;
        user-select: text;
    }
}

/* ===================================
   PAGE OVERLAY (darkens page content when menu open)
   =================================== */

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gallery-overlay-transparent);
    z-index: 50; /* Below nav (100) but above page content */
    pointer-events: none;
    transition: background 0.3s ease;
}

.mobile-menu-overlay.active {
    background: var(--overlay-dark);
    pointer-events: auto;
}

/* ===================================
   HAMBURGER MENU TOGGLE
   =================================== */

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 110;
    position: relative;
    flex-shrink: 0;
}

.mobile-menu-toggle span {
    position: absolute;
    width: 20px;
    height: 2px;
    background-color: var(--color-blue-digital);
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    transform-origin: center center;
    left: 50%;
    margin-left: -10px;
}

.mobile-menu-toggle span:nth-child(1) {
    top: 50%;
    margin-top: -7px;
}

.mobile-menu-toggle span:nth-child(2) {
    top: 50%;
    margin-top: 0;
}

.mobile-menu-toggle span:nth-child(3) {
    top: 50%;
    margin-top: 7px;
}

/* Hamburger animation when menu is open - proper X cross */
.mobile-menu-toggle.active span:nth-child(1) {
    top: 50%;
    margin-top: 0;
    transform: rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.mobile-menu-toggle.active span:nth-child(3) {
    top: 50%;
    margin-top: 0;
    transform: rotate(-45deg);
}



/* ===================================
   MOBILE NAVIGATION (< 768px)
   =================================== */

/* Nav hide on scroll */
.heif-nav-container {
    transition: transform 1.2s ease-in-out, background-color 0.3s ease;
}

.heif-nav-container.nav-hidden {
    transform: translateY(-100%);
}

@media (max-width: 768px) {
    /* Show hamburger menu */
    .mobile-menu-toggle {
        display: flex;
    }

    /* Ensure nav title stays above mobile menu */
    .heif-nav .heif-nav-title {
        z-index: 105;
        position: relative;
    }

    .heif-nav .heif-nav-row{
        padding-top: 2%;
    }

    /* Mobile menu slides down from below nav bar */
    .heif-nav-items {
        position: fixed;
        top: clamp(50px, 8vh, 64px);
        left: 0;
        right: 0;
        background: var(--bg-muted);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 0px;
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), 
                    opacity 0.3s ease, 
                    visibility 0.3s ease;
        box-shadow: var(--shadow-lg);
        z-index: 99;
        max-height: calc(100vh - clamp(50px, 8vh, 64px));
        max-height: calc(100dvh - clamp(50px, 8vh, 64px));
        overflow-y: auto;
        border-radius: 0; /* No rounded corners - seamless with nav */
    }

    .heif-nav-items.mobile-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    /* Hide regular nav items on mobile - only show dropdowns */
    .heif-nav .heif-nav-item {
        display: none;
    }

    /* Dropdown sections - card style */
    .mobile-dropdown {
        background: var(--card-bg);
        border-radius: 0px;
        margin-bottom: 0px;
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: box-shadow 0.2s ease, transform 0.2s ease;
    }
    
    .mobile-dropdown:last-child {
        margin-bottom: 0;
    }
    
    .mobile-dropdown:hover {
        box-shadow: var(--shadow-md);
    }
    
    .mobile-dropdown.open {
        box-shadow: var(--shadow-lg);
    }

    .mobile-dropdown-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 16px 18px;
        margin: 0;
        font-weight: 700;
        font-size: 13px;
        letter-spacing: 0.5px;
        color: var(--color-blue-digital);
        cursor: pointer;
        background: transparent;
        transition: background-color 0.2s ease;
        text-transform: uppercase;
    }

    .mobile-dropdown-header:hover {
        background-color: var(--color-blue-light);
    }
    
    .mobile-dropdown.open .mobile-dropdown-header {
        background-color: var(--nav-dropdown-hover);
    }

    /* Dropdown arrow indicator */
    .mobile-dropdown-header::after {
        content: '';
        width: 8px;
        height: 8px;
        border-right: 2px solid var(--color-blue-digital);
        border-bottom: 2px solid var(--color-blue-digital);
        transform: rotate(45deg);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        opacity: 0.6;
    }

    .mobile-dropdown.open .mobile-dropdown-header::after {
        transform: rotate(-135deg);
    }

    .mobile-dropdown-header:hover::after {
        opacity: 1;
    }

    .mobile-dropdown-content {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        background: var(--bg-page);
    }

    .mobile-dropdown.open .mobile-dropdown-content {
        max-height: 300px;
        overflow-y: auto;
    }

    /* Dropdown items - clean style without index numbers */
    .mobile-dropdown-content .heif-nav-item {
        display: flex !important;
        align-items: center;
        padding: 14px 18px !important;
        font-size: 14px !important;
        font-weight: 500 !important;
        color: var(--fg-secondary) !important;
        background: transparent !important;
        border-bottom: 1px solid var(--border-divider) !important;
        transition: background-color 0.2s ease, padding-left 0.2s ease !important;
    }
    
    .mobile-dropdown-content .heif-nav-item:last-child {
        border-bottom: none !important;
    }

    .mobile-dropdown-content .heif-nav-item:hover {
        background: var(--color-blue-light) !important;
        padding-left: 22px !important;
    }

    /* Nav row layout adjustments */
    .heif-nav-row {
        min-height: 50px;
        padding: 5px 0;
    }
    
    /* Remove nav margins on mobile to eliminate gap */
    .heif-nav {
        margin-top: 0;
        margin-bottom: 0;
    }
    
    /* Ensure nav container has consistent height + safe area */
    .heif-nav-container {
        height: clamp(50px, 8vh, 64px);
        padding-top: var(--safe-top);
    }

    /* Nav title size adjustments */
    .heif-nav .heif-nav-title {
        font-size: 20px;
    }

    .heif-nav .heif-nav-title-big {
        font-size: 20px;
        letter-spacing: 2px;
    }

    .heif-nav .heif-nav-title-small {
        font-size: 8px;
    }

    /* Right side controls container */
    .mobile-nav-controls {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
        margin-right: 0;
    }
    
    /* Ensure nav doesn't overflow viewport */
    .heif-nav {
        padding: 0 3%;
        overflow-x: hidden;
    }
    
    .heif-nav-row {
        max-width: 100%;
    }
}

/* ===================================
   CONTENT PADDING ADJUSTMENTS
   =================================== */

@media (max-width: 768px) {
    /* Add padding-top to content pages to account for fixed nav */
    .heif-comparison-content,
    .heif-technical-content,
    .heif-news-content {
        padding-top: max(70px, 12vh);
    }
    
    /* Reduce main content padding - ensure equal left/right */
    .heif-comparison-content,
    .heif-technical-content,
    .heif-news-content {
        padding-left: 4%;
        padding-right: 4%;
        padding-bottom: 3%;
        /* Fix Bootstrap row negative margins causing overflow */
        overflow-x: hidden;
    }

    .heif-news-content .heif-news-item {
        margin-bottom: 1.5em;
    }

    .heif-news-timeline {
        padding-left: 24px;
    }

    .heif-news-timeline::before {
        left: 2px;
    }

    .heif-news-dot {
        left: -24px;
        width: 6px;
        height: 6px;
    }

    .heif-news-title {
        font-size: 16px;
    }

    .heif-news-body {
        font-size: 13px;
    }
    
    /* Fix Bootstrap row margins on comparison page */
    .heif-comparison-content .row {
        margin-left: 0;
        margin-right: 0;
    }
    
    .heif-comparison-content [class*="col-"] {
        padding-left: 10px;
        padding-right: 10px;
    }

    .heif-comparison-content-text {
        width: 100%;
        margin-top: 15px;
        margin-bottom: 15px;
    }
    
    .heif-comparison-content-text h3 {
        margin-top: 10px;
    }

    /* Examples container padding */
    .heif-examples-container {
        padding: max(70px, 12vh) 4%;
    }

    /* About section padding */
    .heif-about-content,
    .heif-features-content,
    .heif-download-content {
        padding-left: 4%;
        padding-right: 4%;
    }

    /* Welcome message positioning - keep centered like desktop */
    .heif-welcome-message-container {
        top: 50%;
    }

    .heif-welcome-message-big,
    .heif-examples-message-big {
        font-size: 6vw;
        padding: 0 10px;
    }

    .heif-welcome-message-small,
    .heif-examples-message-small {
        font-size: 3.6vw;
        padding: 0 10px;
    }
    
    /* Hero technical info - more readable badge style on mobile */
    .heif-welcome-hero-technical-info {
        font-size: 11px;
        background: var(--mobile-overlay-bg);
        backdrop-filter: blur(4px);
        padding: 6px 10px;
        border-radius: 6px;
        right: 8px;
        bottom: 8px;
        max-width: calc(100% - 16px);
        white-space: nowrap;
    }
}

@media (max-width: 576px) {
    /* Even smaller padding on small phones */
    .heif-comparison-content {
        padding-top: 70px;
    }
    
    .heif-comparison-content,
    .heif-technical-content,
    .heif-news-content {
        padding-left: 3%;
        padding-right: 3%;
        padding-bottom: 2%;
    }

    .heif-examples-container {
        padding: max(60px, 10vh) 3%;
    }

    .heif-about-content,
    .heif-features-content,
    .heif-download-content {
        padding-left: 3%;
        padding-right: 3%;
    }
    
    /* Hero technical info - even more compact on small phones */
    .heif-welcome-hero-technical-info {
        font-size: 10px;
        padding: 5px 8px;
        border-radius: 4px;
    }
}

/* ===================================
   LANDSCAPE MOBILE - REDUCED PADDINGS
   =================================== */

@media (max-width: 900px) and (orientation: landscape) {
    /* Reduce side paddings in landscape mode */
    .heif-comparison-content,
    .heif-technical-content,
    .heif-news-content {
        padding-left: 2%;
        padding-right: 2%;
    }
    
    .heif-examples-container {
        padding-left: 2%;
        padding-right: 2%;
    }
    
    .heif-about-content,
    .heif-features-content,
    .heif-download-content {
        padding-left: 2%;
        padding-right: 2%;
    }
    
    /* Gallery grid adjustments for landscape */
    .gallery-grid {
        padding: 0 2%;
    }
    
    /* Welcome container in landscape - keep centered */
    .heif-welcome-message-container {
        top: 50%;
    }
}

/* ===================================
   GALLERY SET SWITCHER MOBILE
   =================================== */

@media (max-width: 768px) {
    .gallery-container {
        padding-top: clamp(60px, 10vh, 90px);
    }

    .gallery-header {
        padding: 15px 12px;
    }

    .gallery-header h1 {
        font-size: 1.6rem;
    }

    .gallery-subtitle {
        font-size: 0.85rem;
    }

    /* Tab buttons — scrollable single row */
    .gallery-set-switcher {
        gap: 0;
        margin-top: 10px;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
        justify-content: flex-start;
        padding: 0 4%;
        -webkit-overflow-scrolling: touch;
    }
    .gallery-set-switcher::-webkit-scrollbar {
        display: none;
    }

    .gallery-set-btn {
        padding: 8px 14px;
        font-size: 0.82rem;
        white-space: nowrap;
        flex-shrink: 0;
    }

    /* View control — compact, centered */
    .gallery-view-control {
        width: calc(100% - 24px);
        font-size: 0.72rem;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .gallery-set-btn {
        padding: 7px 10px;
        font-size: 0.78rem;
    }

    .gallery-header h1 {
        font-size: 1.3rem;
    }
}

/* ===================================
   GALLERY MODAL MOBILE IMPROVEMENTS
   =================================== */

/*
 * TABLET (768px and below)
 * - Reduced padding
 * - Smaller controls
 * - Info panel adjustments
 * - Proper spacing between elements and info box
 */
@media (max-width: 768px) {
    /* Base modal content - IMAGE CENTERED */
    .gallery-modal-content {
        padding: max(44px, 8vh) 1% max(70px, 12vh) 1%;
        gap: clamp(6px, 1.5vh, 12px);
    }

    /* Still images - CENTERED */
    .gallery-modal-content > canvas,
    .gallery-modal-content > img {
        max-width: 100%;
        max-height: 100%;
    }

    /* Close button — push below status bar / rounded corners + safe area */
    .gallery-modal-header {
        top: 0;
        padding: max(14px, calc(2vh + var(--safe-top))) max(12px, calc(2vw + var(--safe-right))) 8px;
    }

    .gallery-modal-quit {
        width: 44px;
        height: 44px;
        /* Visual size stays small; tap target enlarged via padding */
        padding: 9px;
        box-sizing: border-box;
    }

    /* Info panel - fixed at bottom, clear safe area */
    .gallery-modal-info-panel {
        padding: 8px 12px;
        padding-bottom: max(8px, calc(8px + var(--safe-bottom)));
        font-size: 13px;
        bottom: max(8px, calc(1.5vh + var(--safe-bottom)));
        max-width: 95%;
        max-height: 30vh;
        max-height: 30dvh;
        overflow-y: auto;
    }

    .gallery-modal-info-title {
        font-size: 14px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        max-width: 100%;
    }

    /* Info button: keep 18px visible circle, invisible 44px tap area */
    .gallery-modal-info-btn {
        width: 18px;
        height: 18px;
        font-size: 13px;
        font-weight: 400;
        position: relative;
    }
    .gallery-modal-info-btn::before {
        content: '';
        position: absolute;
        inset: -13px;  /* expands tap area to ~44px without visual change */
    }

    .gallery-modal-info-details {
        font-size: 11px;
        gap: 6px;
    }

    .gallery-modal-full-info {
        max-width: 92%;
        width: 92%;
        bottom: max(60px, calc(10vh + var(--safe-bottom)));
        max-height: 50vh;
        max-height: 50dvh;
    }
    
    /* Back button — reposition inside viewport on mobile */
    .gallery-modal-back-btn {
        position: static;
        right: auto;
        top: auto;
        transform: none;
        margin-top: 6px;
        align-self: center;
    }

    /* HDR tooltip — prevent viewport clipping */
    .hdr-tooltip-bubble {
        left: 50%;
        right: auto;
        transform: translateX(-50%) translateY(10px);
        white-space: normal;
        min-width: 200px;
        max-width: calc(100vw - 32px);
    }
    .hdr-tooltip-bubble.visible {
        transform: translateX(-50%) translateY(0);
    }

    /* Burst/Audio controls - scaled down */
    .gallery-burst-controls {
        gap: 6px;
        padding: 3px;
    }
    
    .gallery-burst-btn {
        padding: 5px 10px;
        font-size: 12px;
    }
    
    /* Burst thumbnail strip - with margin to info panel */
    .gallery-burst-strip {
        height: clamp(50px, 10vh, 70px);
        min-height: 50px;
        padding: 5px;
        gap: 4px;
        margin-bottom: clamp(6px, 1.5vh, 12px);
    }
    
    .gallery-burst-strip canvas {
        height: clamp(36px, 7vh, 50px);
        width: auto;
    }
    
    /* Burst indicator */
    .gallery-burst-indicator {
        font-size: 11px;
        margin-top: 4px;
    }
    
    /* Burst main image container */
    .gallery-burst-main {
        margin-bottom: 6px;
    }
    
    .gallery-burst-main canvas {
        box-shadow: none;
    }
    
    /* Collection container - ensure proper order */
    .gallery-collection-container {
        gap: 8px;
    }
    
    /* Collection indicator */
    .gallery-collection-indicator {
        text-align: center;
        font-size: 11px;
    }
    
    /* Collection strip - with margin to info panel */
    .gallery-collection-strip {
        height: clamp(50px, 10vh, 70px);
        min-height: 50px;
        padding: 5px 8px;
        margin-bottom: clamp(6px, 1.5vh, 12px);
    }
    
    .gallery-collection-thumb {
        height: clamp(36px, 7vh, 50px);
        width: auto;
        border-width: 2px;
    }
    
    /* Album controls - scaled for mobile */
    .gallery-album-controls {
        gap: 5px;
        margin-bottom: 5px;
    }
    
    .gallery-album-label {
        font-size: 11px;
        padding: 0 8px;
    }
    
    .gallery-album-items-bar {
        gap: 4px;
        margin-bottom: 6px;
    }
    
    .gallery-album-id-btn {
        padding: 4px 7px;
        font-size: 11px;
        min-width: 45px;
    }
    
    /* Modal grid */
    .gallery-modal-grid {
        gap: 6px;
        padding: 6px;
    }
    
    .gallery-modal-grid canvas {
        max-width: 130px;
        max-height: 130px;
    }
    
    /* Examples modal */
    .heif-examples-modal-window {
        padding-top: 45px;
    }
    
    .heif-examples-modal-content {
        padding: 0 12px;
    }
    
    .heif-examples-modal-content canvas {
        max-width: 100%;
        max-height: calc(100vh - 90px);
        max-height: calc(100dvh - 90px);
    }
}

/*
 * PHONE (480px and below)
 * - Even smaller padding
 * - More compact controls
 */
@media (max-width: 480px) {
    .gallery-modal-content {
        gap: 6px;
    }

    .gallery-modal-info-panel {
        padding: 6px 10px;
        padding-bottom: max(6px, calc(6px + var(--safe-bottom)));
        bottom: max(4px, calc(1vh + var(--safe-bottom)));
    }

    .gallery-modal-info-title {
        font-size: 12px;
    }

    .gallery-modal-info-details {
        font-size: 9px;
        gap: 4px;
    }
    
    .gallery-burst-controls {
        gap: 4px;
    }
    
    .gallery-burst-btn {
        padding: 4px 7px;
        font-size: 10px;
    }
    
    /* Audio controls - hide volume on small screens */
    .gallery-burst-controls .audio-volume-label,
    .gallery-burst-controls input[type="range"] {
        display: none;
    }
    
    .gallery-burst-strip {
        height: 50px;
        min-height: 50px;
        margin-bottom: max(50px, calc(8vh + var(--safe-bottom)));
    }
    
    .gallery-burst-strip canvas {
        height: 38px;
    }
    
    .gallery-burst-indicator {
        font-size: 10px;
    }
    
    .gallery-collection-strip {
        height: 50px;
        min-height: 50px;
        margin-bottom: max(50px, calc(8vh + var(--safe-bottom)));
    }
    
    .gallery-collection-thumb {
        height: 38px;
    }
    
    .gallery-collection-indicator {
        font-size: 10px;
    }
    
    /* Album controls - very compact */
    .gallery-album-controls {
        gap: 3px;
        margin-bottom: 3px;
    }
    
    .gallery-album-label {
        font-size: 10px;
        padding: 0 5px;
    }
    
    .gallery-album-items-bar {
        gap: 3px;
        margin-bottom: 4px;
    }
    
    .gallery-album-id-btn {
        padding: 3px 5px;
        font-size: 10px;
        min-width: 38px;
    }
    
    .gallery-modal-grid canvas {
        max-width: 100px;
        max-height: 100px;
    }
}

/* ===================================
   LANDSCAPE MOBILE - MAXIMIZE IMAGE
   =================================== */

/*
 * Landscape orientation on mobile devices
 * - Maximize image area with proper centering
 * - Transparent overlay info panel
 * - Minimize UI chrome
 * - Controls on right side for stereo/bothie
 */
@media (max-width: 900px) and (orientation: landscape) {
    /* Base modal - gap adjustment for landscape */
    .gallery-modal-content {
        padding-top: max(36px, 6vh);
        gap: 6px;
    }
    
    /* Still images fill the viewport - CENTERED */
    .gallery-modal-content > canvas,
    .gallery-modal-content > img {
        max-width: 100%;
        max-height: calc(100vh - max(50px, 8vh));
        max-height: calc(100dvh - max(50px, 8vh));
    }
    
    /* Smaller close button — keep top padding for safe area */
    .gallery-modal-header {
        padding: max(10px, calc(2vh + var(--safe-top))) max(8px, calc(1.5vw + var(--safe-right))) 4px;
    }
    
    .gallery-modal-quit {
        width: 44px;
        height: 44px;
        padding: 11px;
        box-sizing: border-box;
        opacity: 0.6;
    }
    
    /* Info panel - transparent overlay at bottom */
    .gallery-modal-info-panel {
        padding: 5px 10px;
        padding-bottom: max(5px, calc(5px + var(--safe-bottom)));
        font-size: 10px;
        bottom: max(2px, var(--safe-bottom));
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(8px);
    }
    
    .gallery-modal-info-title {
        font-size: 10px;
    }
    
    .gallery-modal-info-details {
        font-size: 9px;
        gap: 4px;
    }
    
    .gallery-modal-full-info {
        bottom: calc(35px + var(--safe-bottom));
        max-height: 45vh;
        max-height: 45dvh;
        background: rgba(0, 0, 0, 0.8);
    }
    
    /* 
     * STEREO/BOTHIE CONTROLS - position on right side 
     * These modals use gallery-burst-controls with only 2-3 buttons
     * Exclude burst-view, collection-view, and album-view
     */
    .gallery-modal-content:not(.burst-view):not(.collection-view):not(.album-view) .gallery-burst-controls {
        position: fixed;
        right: 8px;
        top: 50%;
        transform: translateY(-50%);
        flex-direction: column;
        gap: 5px;
        background: rgba(0, 0, 0, 0.6);
        padding: 6px;
        border-radius: 6px;
        z-index: 1001;
        animation: none;
    }
    
    .gallery-modal-content:not(.burst-view):not(.collection-view):not(.album-view) .gallery-burst-btn {
        padding: 5px 8px;
        font-size: 10px;
        white-space: nowrap;
    }
    
    .gallery-modal-content:not(.burst-view):not(.collection-view):not(.album-view) .gallery-burst-main canvas {
        max-height: calc(100vh - 50px);
        max-height: calc(100dvh - 50px);
        max-width: calc(100vw - 100px);
    }
    
    /* Audio controls labels - hide in landscape for space */
    .gallery-modal-content .audio-time,
    .gallery-modal-content .audio-status-label {
        font-size: 9px;
    }
    
    /* Burst strip in non-burst-view (audio-image) */
    .gallery-modal-content:not(.burst-view) .gallery-burst-strip {
        height: 45px;
        min-height: 45px;
    }
    
    .gallery-modal-content:not(.burst-view) .gallery-burst-strip canvas {
        height: 35px;
    }
    
    /* 
     * ALBUM/FAVORITES CONTROLS - scale down for mobile landscape
     * Keep controls at top but very compact
     */
    .gallery-album-controls {
        gap: 3px;
        margin-bottom: 3px;
        background: rgba(0, 0, 0, 0.4);
        padding: 3px 6px;
        border-radius: 4px;
    }
    
    .gallery-album-controls .gallery-burst-btn {
        padding: 3px 6px;
        font-size: 9px;
    }
    
    .gallery-album-label {
        font-size: 9px;
        padding: 0 4px;
        min-width: auto;
        white-space: normal;
        text-align: center;
    }
    
    .gallery-album-items-bar {
        gap: 2px;
        margin-bottom: 3px;
        background: rgba(0, 0, 0, 0.3);
        padding: 2px 4px;
        border-radius: 4px;
        max-height: 30px;
        overflow-x: auto;
        overflow-y: hidden;
        flex-wrap: nowrap;
    }
    
    .gallery-album-id-btn {
        padding: 2px 4px;
        font-size: 9px;
        min-width: 32px;
    }
    
    /* Album view main image centering */
    .gallery-modal-content.album-view .gallery-burst-main canvas {
        max-height: calc(100vh - 90px);
        max-height: calc(100dvh - 90px);
        max-width: 100%;
    }
    
    /* 
     * COLLECTION VIEW - indicator text inside main area
     * Strip on right side, centered and auto-sized
     */
    .gallery-collection-container {
        flex-direction: row;
        gap: 8px;
    }
    
    /* Collection indicator - compact and inside main */
    .gallery-collection-indicator {
        position: absolute;
        top: 1%;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(0, 0, 0, 0.6);
        padding: 2px 6px;
        border-radius: 4px;
        font-size: 9px;
        white-space: nowrap;
    }
    
    .gallery-collection-main {
        flex: 1;
        position: relative;
    }
    
    .gallery-collection-canvas {
        max-height: calc(100vh - 50px);
        max-height: calc(100dvh - 50px);
        max-width: calc(100vw - 100px);
    }
    
    /* Collection strip - vertical on right, auto-height centered */
    .gallery-collection-strip {
        position: fixed; /* stays put */
        right: 1%; /* Small gap to the right*/
        top: 50%; /* in the middle vertically */
        transform: translateY(-50%);
        flex-direction: column; /* is a column*/
        height: auto;
        max-height: calc(100vh - 60px);
        max-height: calc(100dvh - 60px);
        min-height: auto;
        width: 10%;
        padding: 7px;
        margin-bottom: 0;
        border-radius: 6px;
        overflow-y: auto;
    }
    
    .gallery-collection-thumb {
        width: 95%;
        height: auto;
        border-width: 2px;
    }
    
    /* Modal grid */
    .gallery-modal-grid {
        gap: 5px;
        padding: 4px;
    }
    
    .gallery-modal-grid canvas {
        max-height: 90px;
        max-width: 90px;
    }
    
    /* Examples modal */
    .heif-examples-modal-window {
        padding-top: 8px;
    }
    
    .heif-examples-modal-content {
        padding: 5px 15px;
        min-height: 0;
        height: auto;
    }
    
    .heif-examples-modal-content canvas {
        max-height: calc(100vh - 20px);
        max-height: calc(100dvh - 20px);
        max-width: calc(100vw - 30px);
    }
    
    /* Burst indicator text - for NON-burst-view modals (audio-image, etc.) */
    .gallery-modal-content:not(.burst-view) .gallery-burst-indicator {
        font-size: 10px;
        margin-top: 4px;
        background: rgba(0, 0, 0, 0.6);
        padding: 2px 8px;
        border-radius: 4px;
    }
    
    /* Ensure burst-main has position relative for indicator positioning */
    .gallery-modal-content:not(.burst-view) .gallery-burst-main {
        position: relative;
    }
}

/* ===================================
   COMPARISON PAGE MOBILE LAYOUT
   =================================== */

@media (max-width: 768px) {
    /* Better spacing for stacked comparison images */
    .heif-image-comparison-content.row,
    .sequences-comparison-content.row {
        margin-top: 20px;
        margin-bottom: 10px;
    }

    .heif-image-comparison-item {
        margin-bottom: 15px;
    }
    
    /* Add visual separator between HEIC vs JPEG comparison pairs */
    .heif-image-comparison-content.row {
        padding-bottom: 15px;
        margin-bottom: 15px;
    }
    
    /* 
     * WITHIN-SECTION separators: subtle spacing between comparison pairs
     * Uses whitespace + subtle gradient rather than hard lines
     */
    .heif-image-comparison-content.row + .heif-image-comparison-content.row {
        margin-top: 40px;
        padding-top: 25px;
        border-top: none;
        position: relative;
    }
    
    /* Subtle dot separator between comparisons within same section */
    .heif-image-comparison-content.row + .heif-image-comparison-content.row::before {
        content: '•  •  •';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        text-align: center;
        font-size: 16px;
        letter-spacing: 6px;
        color: var(--color-blue-bright);
    }
    
    /* Last comparison shouldn't have separator before footer */
    .heif-image-comparison-content.row:last-of-type {
        margin-bottom: 20px;
    }
    
    /* Section separators - span full viewport width */
    .heif-image-comparison-separator {
        height: 60px;
        background: var(--mobile-separator-gradient);
        margin: 30px 0;
        margin-left: calc(-4% - 10px);
        margin-right: calc(-4% - 10px);
        padding-left: calc(4% + 10px);
        padding-right: calc(4% + 10px);
        position: relative;
        width: calc(100% + 8% + 20px);
    }
    
    /* Center line accent for section separator */
    .heif-image-comparison-separator::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 5%;
        right: 5%;
        height: 1px;
        background: var(--mobile-separator-line);
    }
    
    /* Reduce gap between sequences comparison items and info */
    .sequences-comparison-content .sequences-comparison-image-container {
        margin-bottom: 10px;
    }
    
    /* Fix spacing for sequences comparison - ensure info panel doesn't touch next image */
    .sequences-comparison-content.row,
    .heif-image-comparison-content.row:has(#heif-container),
    .heif-image-comparison-content.row:has(#gif-container) {
        margin-bottom: 25px;
        padding-bottom: 10px;
    }
    
    /* Info panel spacing fix */
    .sequences-comparison-info-panel {
        margin-top: 8px;
        margin-bottom: 15px;
    }
    
    /* Fix info panel not overlapping images */
    .heif-comparison-info-panel {
        position: relative;
        margin-top: 8px;
    }

    /* Comparison info panel adjustments */
    .heif-comparison-info-panel {
        padding: 8px 12px;
        font-size: 12px;
    }

    .heif-comparison-info-title {
        font-size: 12px;
    }

    .heif-comparison-info-details {
        font-size: 10px;
    }

    /* Zoom preview size adjustments */
    .heif-zoom-preview {
        width: 100px;
        height: 100px;
    }

    /* Sequences toolbar */
    .sequences-toolbar {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
        margin: 15px 0;
    }
    
    /* Fix gap before footer in comparison page */
    .heif-comparison-content > .row:last-child,
    .heif-comparison-content > div:last-child {
        margin-bottom: 20px;
    }
    .sequences-toolbar-element {
        flex: 0 0 auto;
    }
}

@media (max-width: 576px) {
    .heif-image-comparison-content.row,
    .sequences-comparison-content.row {
        margin-top: 25px;
    }

    .heif-comparison-content-text h3 {
        font-size: 1.2em;
    }

    .heif-comparison-content-text p {
        font-size: 14px;
        text-align: left;
    }
}

/* ===================================
   FOOTER MOBILE ADJUSTMENTS
   =================================== */

@media (max-width: 768px) {
    .heif-footer-container {
        padding: 15px 10px;
        font-size: 12px;
    }

    .heif-footer-container span {
        margin-bottom: 5px;
    }
}

@media (max-width: 480px) {
    .heif-footer-container {
        padding: 12px 8px;
        font-size: 11px;
        line-height: 1.4;
    }
}

/* ===================================
   EXAMPLES PAGE MOBILE
   =================================== */

@media (max-width: 768px) {
    .heif-example-container .heif-example-content {
        height: 35vh;
    }

    .heif-example-content .heif-example-title {
        font-size: 2.5vh;
        height: auto;
        min-height: 25%;
        padding: 8px 15px 8px 8px;
    }

    .heif-examples-info-container {
        padding: 0 10px;
    }
}

@media (max-width: 480px) {
    .heif-example-container .heif-example-content {
        height: 30vh;
    }

    .heif-example-content .heif-example-title {
        font-size: 14px;
    }
}

/* ===================================
   TECHNICAL PAGE MOBILE
   =================================== */

@media (max-width: 768px) {
    .heif-technical-content h3 {
        font-size: 1.3em;
    }

    .heif-technical-content p,
    .heif-technical-content li {
        font-size: 14px;
    }

    .heif-technical-content table {
        font-size: 12px;
    }

    .heif-technical-content pre {
        font-size: 11px;
        overflow-x: auto;
    }
}

/* ===================================
   DOWNLOAD SECTION MOBILE
   =================================== */

@media (max-width: 768px) {
    .heif-download-content {
        padding-top: 20px;
    }

    .heif-download-content-title {
        font-size: 24px;
    }

    .heif-download-content-info {
        font-size: 14px;
    }

    .heif-download-content li {
        font-size: 14px;
    }
}

/* ===================================
   GENERAL MOBILE UTILITIES
   =================================== */

@media (max-width: 768px) {
    /* Add top margin to account for fixed nav */
    .heif-examples-container:first-of-type {
        margin-top: clamp(50px, 8vh, 64px);
    }

    /* Inside the fullpage wrapper (index page) the nav starts hidden and
       sections are position:absolute, so no compensating margin is needed.
       Stand-alone welcome containers on other pages still get the offset. */
    .heif-welcome-container {
        margin-top: clamp(50px, 8vh, 64px);
    }
    .heif-fullpage-wrapper .heif-welcome-container {
        margin-top: 0;
    }

    /* Better touch targets */
    a, button {
        min-height: 44px;
        min-width: 44px;
    }

    /* Exception for inline links in text */
    p a, li a, span a {
        min-height: auto;
        min-width: auto;
    }
}

/* Hide desktop-only elements on mobile - ensure no space taken */
@media (max-width: 768px) {
    .desktop-only {
        display: none !important;
        visibility: hidden !important;
        height: 0 !important;
        overflow: hidden !important;
        padding: 0 !important;
        margin: 0 !important;
        border: none !important;
    }
    
    /* Ensure nav-dropdown (desktop) takes no space */
    .heif-nav-items .nav-dropdown {
        display: none !important;
        height: 0 !important;
        padding: 0 !important;
        margin: 0 !important;
    }
}

/* Hide mobile-only elements on desktop */
@media (min-width: 769px) {
    .mobile-only {
        display: none !important;
    }

    .mobile-menu-toggle {
        display: none !important;
    }

}

/* ===================================
   GALLERY BURST GRID FIX (MOBILE)
   =================================== */

/* Portrait mode uses default styles from gallery.css:
   - Single view: horizontal scrollable strip at bottom
   - Grid view: flex-wrap grid of images
   No overrides needed for portrait. */

/* ===================================
   DESKTOP DROPDOWN NAVIGATION
   =================================== */

/* Desktop dropdown wrapper */
.nav-dropdown {
    position: relative;
    display: inline-block;
    color: var(--transparent);
}

.nav-dropdown-trigger {
    display: inline-flex !important;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}


/* Dropdown chevron indicator */
.nav-dropdown-trigger::after {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-right: 2px solid var(--color-gray-dark);
    border-bottom: 2px solid var(--color-gray-dark);
    transform: rotate(45deg);
    transition: transform 0.2s ease, margin-top 0.2s ease;
    margin-top: -3px;
    margin-left: 2px;
    flex-shrink: 0;
}

.nav-dropdown:hover .nav-dropdown-trigger::after {
    transform: rotate(-135deg);
    margin-top: 3px;
}

.nav-dropdown-content {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(5px);
    background: var(--mobile-dropdown-content-bg);
    backdrop-filter: blur(10px);
    border-radius: 0px;
    padding: 0;
    min-width: 140px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    z-index: 100;
    overflow: hidden;
}

.nav-dropdown:hover .nav-dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown-content .heif-nav-item {
    display: block;
    padding: 10px 16px !important;
    margin: 0 !important;
    font-size: 13px !important;
    background: transparent !important;
    border-radius: 0 !important;
    white-space: nowrap;
    transition: background-color 0.15s ease;
    line-height: 1.4 !important;
}

.nav-dropdown-content .heif-nav-item:hover {
    background-color: var(--transparent) !important;
}

/* Hide desktop dropdowns on mobile */
@media (max-width: 768px) {
    .nav-dropdown {
        display: none !important;
    }
}