/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    min-height: 100vh;
    height: 100vh;
    min-height: 100dvh;
    height: 100dvh;
}

/* ===== Top Bar ===== */
.top-bar {
    height: 50px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 1rem;
    gap: 1rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.menu-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.menu-toggle:hover {
    background-color: var(--bg-hover);
}

.app-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--accent-primary);
    text-decoration: none;
    cursor: pointer;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.app-title:hover {
    opacity: 0.88;
    transform: translateY(-1px);
}

.app-title i {
    font-size: 1.2rem;
}

/* Theme indicator removed per user request */

/* ===== App Container ===== */
.app-container {
    display: flex;
    min-height: 0;
    position: fixed;
    top: 50px;
    right: 0;
    bottom: 0;
    left: 0;
    container-type: inline-size;
    container-name: app-shell;
}

/* ===== Sidebar ===== */
.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    overflow-x: hidden;
    flex-shrink: 0;
    min-height: 0;
    transition: width 0.3s ease;
}

.sidebar.collapsed {
    width: 60px;
}

.sidebar.collapsed .nav-item span {
    display: none;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 0.75rem;
}

.sidebar.collapsed .nav-item i {
    margin: 0;
}

.sidebar-nav {
    padding: 0.5rem 0;
    display: flex;
    flex-direction: column;
    min-height: 100%;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    font-size: 0.9rem;
    white-space: nowrap;
    position: relative;
    margin: 0 0.5rem;
    border-radius: 4px;
}

.nav-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.1);
}

.nav-item.active {
    background-color: var(--accent-primary);
    color: #ffffff;
    font-weight: 500;
    box-shadow: 0 0 12px rgba(0, 122, 204, 0.4);
}

.nav-item.active i {
    color: #ffffff;
}

.sidebar.collapsed .nav-item {
    margin: 0 0.25rem;
    position: relative;
}

/* Tooltip for collapsed sidebar */
.sidebar.collapsed .nav-item:hover::after {
    content: attr(title);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    margin-left: 10px;
    padding: 0.5rem 0.75rem;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    white-space: nowrap;
    font-size: 0.875rem;
    z-index: 1000;
    pointer-events: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.sidebar.collapsed .nav-item.active {
    background-color: var(--accent-primary);
}

/* Spacer to push settings to bottom */
.nav-spacer {
    flex-grow: 1;
}

.nav-item i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.nav-category {
    margin: 0.5rem 0;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category-header i {
    font-size: 1rem;
}

.category-items {
    padding-left: 0;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    overflow-y: auto;
    background-color: var(--bg-primary);
    min-height: 0;
    padding: 2rem;
    container-type: inline-size;
    container-name: page-content;
}

.content-header {
    margin-bottom: 2rem;
}

.content-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.content-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== Search Bar ===== */
.search-bar {
    margin-bottom: 2rem;
}

.search-field {
    position: relative;
    width: 100%;
    max-width: 600px;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1rem;
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem;
    padding-left: 2.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all 0.2s;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background-color: var(--bg-tertiary);
}

.search-input::placeholder {
    color: var(--text-muted);
}

/* ===== Tool Cards Grid ===== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.tool-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: block;
}

.tool-card:hover {
    background-color: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.tool-icon {
    width: 60px;
    height: 60px;
    background-color: var(--bg-tertiary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 1.8rem;
    color: var(--text-primary);
}

.tool-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.tool-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* ===== QR Mode Page Layout ===== */
.qr-mode-page {
    margin: 0 auto;
}

.qr-content-wrapper {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 2rem;
}

.qr-form-section {
    min-width: 0;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.qr-preview-section {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    position: sticky;
    top: 2rem;
    height: fit-content;
}

.section-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title i {
    color: var(--accent-primary);
}

/* ===== Form Elements ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: all 0.2s;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    background-color: var(--bg-tertiary);
}

.platform-select-native {
    display: none;
}

.platform-dropdown {
    position: relative;
}

.platform-dropdown.is-open {
    z-index: 35;
}

.platform-dropdown-trigger {
    width: 100%;
    padding: 0.75rem 0.9rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.platform-dropdown-trigger:hover,
.platform-dropdown.is-open .platform-dropdown-trigger,
.platform-dropdown-trigger:focus-visible {
    outline: none;
    border-color: var(--accent-primary);
    background-color: var(--bg-tertiary);
}
.platform-dropdown-trigger-value {
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.platform-dropdown-trigger-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.platform-dropdown-trigger-logo,
.platform-dropdown-option-logo {
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 999px;
    overflow: hidden;
    flex: 0 0 1.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
}
.platform-dropdown-trigger-logo.is-placeholder,
.platform-dropdown-option-logo i {
    color: var(--text-secondary);
    font-size: 0.95rem;
}
.platform-dropdown-trigger-logo-image,
.platform-dropdown-option-logo-image {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}
.platform-dropdown-trigger-chevron {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: transform 0.2s ease;
}
.platform-dropdown.is-open .platform-dropdown-trigger-chevron {
    transform: rotate(180deg);
}
.platform-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.45rem);
    left: 0;
    right: 0;
    z-index: 30;
    max-height: 19rem;
    padding: 0.4rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 12px 30px var(--shadow);
    overflow-y: auto;
}
.platform-dropdown-option {
    width: 100%;
    border: 0;
    border-radius: 8px;
    padding: 0.55rem 0.65rem;
    background: transparent;
    color: var(--text-primary);
    font: inherit;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
}
.platform-dropdown-option:hover,
.platform-dropdown-option:focus-visible {
    outline: none;
    background: var(--bg-card-hover);
}
.platform-dropdown-option.active {
    background: color-mix(in srgb, var(--accent-primary) 16%, transparent);
    color: var(--accent-primary);
}
.platform-dropdown-option-label {
    flex: 1;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ===== Buttons ===== */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-hover);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ===== QR Code Display ===== */
.qr-display {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    padding: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    margin-bottom: 1.5rem;
}

#qrcode {
    display: inline-block;
}

#qrcode canvas,
#qrcode img {
    border-radius: 8px;
}

.qr-placeholder {
    text-align: center;
    color: var(--text-muted);
}

.qr-placeholder i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

/* ===== Download Options ===== */
.download-options {
    margin-top: 1.5rem;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.app-toast-container {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 2000;
    pointer-events: none;
}

.app-toast {
    min-width: 240px;
    max-width: min(360px, calc(100vw - 2rem));
    padding: 0.9rem 1rem;
    border-radius: 10px;
    background-color: rgba(20, 20, 20, 0.94);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.28);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.app-toast.visible {
    opacity: 1;
    transform: translateY(0);
}

.app-toast.error {
    background-color: rgba(116, 25, 25, 0.95);
    border-color: rgba(255, 190, 190, 0.28);
}

body.kiosk-mode {
    overflow: auto;
    background-color: #ffffff;
}

body.share-state-restoring #qrcode,
body.share-state-restoring .qr-preview-section {
    visibility: hidden;
}

body.kiosk-mode .top-bar,
body.kiosk-mode .sidebar,
body.kiosk-mode .content-header,
body.kiosk-mode .qr-form-section,
body.kiosk-mode .download-options,
body.kiosk-mode .qr-preview-section .section-title {
    display: none !important;
}

body.kiosk-mode .app-container {
    position: static;
    min-height: 100vh;
    min-height: 100dvh;
    background-color: #ffffff;
}

body.kiosk-mode .main-content {
    width: 100%;
    max-width: none;
    padding: 0;
    overflow: visible;
    background-color: #ffffff;
}

body.kiosk-mode .qr-mode-page,
body.kiosk-mode .qr-content-wrapper {
    min-height: 100vh;
    min-height: 100dvh;
    background-color: #ffffff;
}

body.kiosk-mode .qr-content-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
}

body.kiosk-mode .qr-preview-section {
    display: block !important;
    background: #ffffff;
    border: none;
    padding: 0;
    box-shadow: none;
    position: static;
}

body.kiosk-mode .qr-display {
    background: #ffffff;
    border: none;
    min-height: auto;
    padding: 0;
}

body.kiosk-mode #qrcode {
    display: flex;
    align-items: center;
    justify-content: center;
}

body.kiosk-mode #qrcode canvas {
    width: auto;
    height: min(88vh, 88vw);
    max-width: 92vw;
    max-height: 92vh;
}

body.kiosk-mode #qrcode img {
    width: auto;
    height: min(88vh, 88vw);
    max-width: 92vw;
    max-height: 92vh;
}

body.kiosk-mode .qr-placeholder {
    border: none;
    background: transparent;
}

/* ===== Settings Page ===== */
.settings-container {
    max-width: 100%;
}

.setting-row {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.setting-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.setting-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.setting-icon.app-icon {
    color: var(--accent-primary);
}

.setting-info {
    flex: 1;
}

.setting-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.setting-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.setting-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.setting-select {
    min-width: 200px;
    padding: 0.5rem 2.5rem 0.5rem 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23e0e0e0' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
}

.setting-select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

/* Toggle Switch */
.toggle-switch {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.toggle-switch input[type="checkbox"] {
    display: none;
}

.toggle-slider {
    width: 48px;
    height: 24px;
    background-color: var(--bg-hover);
    border-radius: 24px;
    position: relative;
    transition: background-color 0.3s;
    border: 1px solid var(--border-color);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: var(--text-primary);
    top: 2px;
    left: 3px;
    transition: transform 0.3s;
}

.toggle-switch input[type="checkbox"]:checked + .toggle-slider {
    background-color: var(--accent-primary);
}

.toggle-switch input[type="checkbox"]:checked + .toggle-slider::before {
    transform: translateX(24px);
}

.toggle-label {
    font-size: 0.9rem;
    color: var(--text-primary);
    min-width: 80px;
}

/* Icon Buttons */
.icon-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
}

.icon-btn:hover {
    background-color: var(--bg-hover);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* App Details Row */
.app-details {
    border-color: var(--border-color);
}

/* Useful Links */
.useful-links {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-top: 1rem;
}

.links-header {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.links-header i {
    font-size: 1.2rem;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.link-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.link-item:hover {
    background-color: var(--bg-hover);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.link-item i {
    font-size: 1.1rem;
}

@container page-content (max-width: 768px) {
    .setting-row {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .setting-right {
        width: 100%;
        justify-content: flex-start;
    }
    
    .setting-select {
        width: 100%;
    }
    
    .links-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Responsive Design ===== */
@container page-content (max-width: 720px) {
    .qr-content-wrapper {
        grid-template-columns: 1fr;
    }
    
    .qr-preview-section {
        position: static;
    }
}

@container app-shell (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 50px;
        bottom: 0;
        width: min(280px, 85cqi);
        transform: translateX(-100%);
        z-index: 999;
        box-shadow: 2px 0 10px var(--shadow);
        transition: transform 0.3s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar.collapsed {
        width: min(280px, 85cqi);
    }

    .sidebar.collapsed .nav-item span {
        display: inline;
    }

    .sidebar.collapsed .nav-item {
        justify-content: flex-start;
        padding: 0.75rem 1rem;
        margin: 0 0.5rem;
    }

    .sidebar.collapsed .nav-item i {
        margin: 0;
    }

    .sidebar.collapsed .nav-item:hover::after {
        display: none;
    }

}

@container page-content (max-width: 768px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }
}

@container app-shell (max-width: 768px) {
    .main-content {
        padding: 1rem;
    }
}

/* ===== Scrollbar Styling ===== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ===== Utility Classes ===== */
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }

.text-center { text-align: center; }
.d-none { display: none; }
.d-block { display: block; }

/* ===== Release Notes Styles ===== */
.release-notes-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.release-notes-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
}

.release-notes-content h1 {
    color: var(--text-primary);
    font-size: 2rem;
    margin-bottom: 0.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--accent-primary);
}

.release-notes-content h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.release-notes-content h3 {
    color: var(--accent-primary);
    font-size: 1.2rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.release-notes-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.release-notes-content ul {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.release-notes-content li {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

.release-notes-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.release-notes-content code {
    background-color: var(--bg-secondary);
    color: var(--accent-primary);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.release-notes-content pre {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.release-notes-content pre code {
    background-color: transparent;
    padding: 0;
}

.release-notes-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

.release-notes-content a {
    color: var(--accent-primary);
    text-decoration: none;
}

.release-notes-content a:hover {
    text-decoration: underline;
}

.loading-spinner {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.loading-spinner i {
    font-size: 2rem;
    margin-bottom: 1rem;
    display: block;
}

.loading-spinner .spin {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.error-message {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.error-message i {
    font-size: 3rem;
    color: var(--accent-secondary);
    margin-bottom: 1rem;
    display: block;
}

/* ===== Frame Selector Cards ===== */
.frame-selector-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
    margin-top: 0.5rem;
}

.frame-card {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.frame-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow);
}

.frame-card.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: #ffffff;
}

.frame-card.active .frame-name {
    color: #ffffff;
}

.frame-preview {
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.5rem;
    background: #ffffff;
    border-radius: 4px;
    padding: 0.5rem;
}

.frame-preview svg {
    max-width: 100%;
    max-height: 100%;
    display: block;
}

.frame-preview img {
    max-width: 100%;
    max-height: 100%;
    display: block;
    border-radius: 4px;
}

.frame-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 0.5rem;
}

.frame-settings-panel {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.frame-settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.frame-color-group {
    min-width: 0;
}

.frame-color-control {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.frame-color-input {
    width: 100%;
    min-height: 44px;
    padding: 0.35rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-card);
    cursor: pointer;
}

.frame-alpha-control {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 0.65rem;
}

.frame-alpha-label,
.frame-alpha-value {
    font-size: 0.78rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.frame-alpha-input {
    width: 100%;
    accent-color: var(--accent-primary);
}

.frame-settings-toggle {
    margin-top: 0.5rem;
}

.logo-settings-panel {
    margin-top: 1rem;
}

.logo-size-range {
    width: 100%;
    accent-color: var(--accent-primary);
}

.qr-customization-panel {
    display: none;
}

.config-accordion {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.config-accordion-item {
    min-width: 0;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-secondary);
    overflow: hidden;
}

.config-accordion-item.open {
    overflow: visible;
}

.config-accordion-trigger {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.1rem;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font: inherit;
    cursor: pointer;
    text-align: left;
}

.config-accordion-trigger:hover {
    background: var(--bg-hover);
}

.config-accordion-trigger-main {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    min-width: 0;
}

.config-accordion-icon {
    width: 2.2rem;
    height: 2.2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border-radius: 999px;
    background: color-mix(in srgb, var(--accent-primary) 14%, transparent);
    color: var(--accent-primary);
}

.config-accordion-copy {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.config-accordion-label {
    font-size: 0.95rem;
    font-weight: 600;
}

.config-accordion-description {
    font-size: 0.8rem;
    line-height: 1.35;
    color: var(--text-secondary);
}

.config-accordion-chevron {
    flex-shrink: 0;
    color: var(--text-secondary);
    transition: transform 0.2s ease;
}

.config-accordion-item.open .config-accordion-chevron {
    transform: rotate(180deg);
}

.config-accordion-panel {
    display: none;
    min-width: 0;
    padding: 1rem 1.1rem 1.1rem;
    border-top: 1px solid var(--border-color);
}

.config-accordion-item.open .config-accordion-panel {
    display: block;
}

.config-settings-intro {
    padding-top: 1rem;
    margin-bottom: 1rem;
}

.config-settings-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.qr-section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.35rem;
    margin-top: 0.2rem;
}

.qr-section-label-icon {
    width: 1.9rem;
    height: 1.9rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: color-mix(in srgb, var(--accent-primary) 14%, transparent);
    color: var(--accent-primary);
}

.qr-section-hint {
    margin-bottom: 0.85rem;
}

.logo-presets-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.85rem;
}

.logo-presets-title {
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text-primary);
}

.logo-presets-panel {
    margin-bottom: 1rem;
    width: 100%;
    min-width: 0;
}

.logo-upload-input {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.logo-presets-search {
    margin-bottom: 0.85rem;
}

.logo-presets-search-input {
    min-height: 42px;
}

.logo-presets-grid {
    display: grid;
    width: 100%;
    max-width: 100%;
    grid-auto-flow: column dense;
    grid-auto-columns: minmax(88px, 88px);
    grid-template-rows: repeat(2, minmax(0, 1fr));
    align-items: stretch;
    gap: 0.75rem;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 0.1rem 0 0.45rem;
    scroll-snap-type: x proximity;
    overscroll-behavior-x: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) var(--bg-secondary);
}

.logo-presets-grid::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

.logo-presets-grid::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.logo-presets-grid::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

.logo-presets-grid::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.logo-presets-empty-state {
    margin-top: 0.8rem;
}

.logo-preset-button {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.55rem;
    width: 88px;
    min-width: 88px;
    padding: 0.7rem 0.55rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    scroll-snap-align: start;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.logo-preset-button[hidden],
.logo-preset-button.is-filtered-out {
    display: none !important;
}

.logo-preset-button:hover {
    transform: translateY(-1px);
    border-color: var(--accent-primary);
    box-shadow: 0 4px 10px var(--shadow-light);
}

.logo-preset-button.active {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
}

.logo-preset-button-action {
    justify-content: center;
    grid-row: 1;
}

.logo-preset-thumb {
    width: 58px;
    height: 58px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.2rem;
    border-radius: 10px;
    background: var(--bg-secondary);
}

.logo-preset-thumb img {
    width: 100%;
    height: 100%;
    display: block;
}

.logo-preset-thumb-branded {
    padding: 0.45rem;
}

.logo-preset-thumb-invert img {
    filter: brightness(0) invert(1);
}

.logo-preset-thumb-action {
    color: var(--text-secondary);
    font-size: 1.35rem;
}

.logo-preset-thumb-upload {
    color: var(--accent-primary);
}

.logo-preset-thumb-uploaded img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

.logo-preset-name {
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1.2;
}

.logo-settings-grid {
    align-items: stretch;
    grid-template-columns: 1fr;
}

.logo-shape-toggle {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.logo-shape-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 34px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.logo-shape-button:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.logo-shape-button.active {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--bg-card);
}

.config-accordion-panel .frame-settings-panel {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.config-accordion-panel .form-group:last-child,
.config-accordion-panel .frame-settings-panel:last-child,
.config-accordion-panel .logo-presets-panel:last-child,
.config-accordion-panel .config-settings-intro:last-child {
    margin-bottom: 0;
}

/* Responsive frame selector */
@container page-content (max-width: 768px) {
    .frame-selector-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
    }
    
    .frame-card {
        padding: 0.5rem;
    }
    
    .frame-preview {
        height: 60px;
    }
    
    .frame-name {
        font-size: 0.75rem;
    }

    .frame-settings-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .frame-alpha-control {
        grid-template-columns: 1fr;
        gap: 0.35rem;
    }

    .logo-presets-grid {
        grid-auto-columns: minmax(80px, 80px);
    }

    .logo-preset-button {
        width: 80px;
        min-width: 80px;
    }

}