:root {
    --font-main: Poppins, sans-serif;
    --font-title: Poppins, sans-serif;
    --transition-main: all 0.3s ease;
}

body {
    font-family: var(--font-main);
    font-optical-sizing: auto;
    font-style: normal;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    width: 90%;
    margin: 0 auto;
    padding: 20px;
}

.main-content {
    padding: 40px 0;
    flex-grow: 1;
    margin-top: calc(64px + env(safe-area-inset-top));
}

.page-description {
    max-width: 800px;
    margin: 0 auto 40px;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 18px;
    line-height: 1.6;
}

.app-header {
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
    box-sizing: border-box;
    position: fixed;
    top: 0;
    left: 0;
    height: calc(64px + env(safe-area-inset-top));
    width: 100%;
    background-color: var(--color-surface);
    z-index: 999;
    display: flex;
    padding-top: env(safe-area-inset-top);
}

.app-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    margin: 0;
    width: 100%;
    max-width: none;
}

.header-left {
    display: flex;
    align-items: center;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-actions:empty {
    display: none;
}

.header-utilities {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-utilities:empty {
    display: none;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 28px;
}

.btn.btn--header-checkout {
    background: #43A047;
    border-radius: 38px;
    color: #fff;
    padding: 6px 16px;
    font-size: 16px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    border: none;
    cursor: pointer;
    margin-left: 6px;
}

.btn.btn--header-checkout .spinner {
    height: 14px;
    width: 14px;
    margin-right: 0;
}

.btn.btn--header-checkout:hover {
    background: var(--color-success);
    transform: none;
}

.material-symbols-rounded {
    font-variation-settings:
        'FILL' var(--icon-fill, 0),
        'wght' var(--icon-weight, 400),
        'GRAD' var(--icon-grade, 0),
        'opsz' var(--icon-opsz, 24);
}

.icon {
    font-family: 'Material Symbols Rounded';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    vertical-align: middle;
    user-select: none;
    color: currentColor;
}

.icon--spin {
    animation: spin 1s linear infinite;
    transform-origin: 50% 50%;
}

.icon--filled {
    --icon-fill: 1;
}

.help-button {
    width: 32px;
    height: 32px;
    border-radius: 32px;
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    background: var(--color-surface);
    color: var(--color-text);
    font-weight: 600;
    font-size: 14px;
    transition: background 0.2s ease, color 0.2s ease;
}

html.theme-dark .help-button {
    border-color: #d9d9d9;
}

html.theme-dark .help-button:disabled {
    border-color: #d9d9d9;
}

.help-button:hover {
    background: var(--color-surface-alt);
    color: var(--color-text);
}

.help-button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    color: var(--color-button-disabled-text);
    background: var(--color-bg-alt);
    border-color: var(--color-button-disabled-border);
}

.help-button__icon {
    line-height: 1;
}

.help-button .icon,
.help-button__icon .icon {
    font-size: 18px;
}

.avatar-widget {
    position: relative;
    display: flex
}

.avatar-trigger {
    width: 40px;
    height: 40px;
    border-radius: 40px;
    border: 1px solid var(--color-border-strong);
    background: var(--color-surface);
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    cursor: pointer;
}

.avatar-trigger:focus {
    outline: 2px solid var(--color-focus-ring);
    outline-offset: 2px;
}

.avatar-trigger img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-popover {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 220px;
    background: var(--color-elevated);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-hard);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 0.2s ease, transform 0.2s ease;
    background-clip: padding-box;
    z-index: 1200;
}

.avatar-widget.is-open .avatar-popover {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.avatar-widget[data-avatar-context="book"] .avatar-popover {
    top: 50%;
    left: calc(100% + 12px);
    right: auto;
    transform: translate(-8px, -50%);
}

.avatar-widget[data-avatar-context="book"].is-open .avatar-popover {
    transform: translate(0, -100%);
}

.avatar-popover__identity {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.avatar-popover__name {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

.avatar-popover__email {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-text-muted);
    word-break: break-word;
}

.avatar-popover__separator {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: 0;
}

.avatar-popover__actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.avatar-popover__theme-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.avatar-popover__theme-title {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.avatar-popover__btn {
    border: none;
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 14px;
    font-weight: 400;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
    font-family: Roboto;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    background: none;
    color: var(--color-text);
}

.avatar-popover__btn:not([hidden]) {
    display: flex;
}

.avatar-popover__btn .icon {
    font-size: 18px;
}

.avatar-popover__btn:hover {
    background: var(--color-surface-alt);
}

.avatar-popover__btn--theme {
    justify-content: flex-start;
    align-items: flex-start;
}

.avatar-popover__btn--theme[data-selected="true"] {
    background: var(--color-surface-alt);
    font-weight: 500;
}

.avatar-popover__btn--theme[data-selected="true"] .icon {
    color: var(--color-accent);
}

.avatar-popover__btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.avatar-popover__theme-note {
    font-size: 12px;
    color: var(--color-text-muted);
}

.card {
    background-color: var(--color-surface);
    border-radius: 8px;
    box-shadow: var(--shadow-soft);
    padding: 30px;
    margin-bottom: 30px;
    transition: var(--transition-main);
}

.card:hover {
    box-shadow: var(--shadow-hard);
}

#auth-prompt {
    margin-top: 40px;
}

#auth-prompt .card {
    text-align: center;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
    border: 1px solid transparent;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition-main);
    text-align: center;
    text-decoration: none;
    font-weight: 400;
}

.btn:hover {
    background-color: var(--color-accent-hover);
    box-shadow: var(--shadow-soft);
}

.btn:disabled,
.btn[disabled] {
    background-color: var(--color-button-disabled-bg);
    border-color: var(--color-button-disabled-border);
    color: var(--color-button-disabled-text);
    cursor: not-allowed;
    opacity: 0.6;
    pointer-events: none;
}

.btn--large {
    padding: 15px 30px;
    font-size: 18px;
}

.btn--secondary {
    background-color: var(--secondary-color);
    color: var(--color-text-inverse);
}

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

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

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

.btn--nav {
    border-radius: 50%;
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--secondary-color);
}

.btn--nav:hover {
    background-color: var(--color-text);
    transform: translateY(-2px);
}

.controls-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}

.controls-group--compact {
    margin-bottom: 0;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-overlay);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-main);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
    display: flex;
}

.modal-content {
    background-color: var(--color-elevated);
    border-radius: 8px;
    padding: 30px;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-hard);
    text-align: center;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    margin: -30px -30px 20px -30px;
}

.modal-header h2,
.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--color-text);
}

.modal-header .close {
    width: 32px;
    height: 32px;
    cursor: pointer;
    border: none;
    background: none;
    color: var(--color-text-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.modal-header .close .icon {
    font-size: 22px;
}

.modal-header .close:hover {
    opacity: 1;
    color: var(--color-text);
}

.modal-title {
    color: var(--secondary-color);
    margin-top: 0;
}

.modal-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 25px;
}

.btn-cancel {
    background-color: var(--color-button-ghost-bg);
    border-color: var(--color-button-ghost-border);
    color: var(--color-button-ghost-text);
}

.btn-cancel:hover {
    background-color: var(--color-button-ghost-hover-bg);
}

.btn-delete {
    background-color: var(--color-danger);
}

.btn-delete:hover {
    background-color: var(--color-danger-hover);
}

/* For share URL functionality */
.share-url-container {
    display: flex;
    margin: 15px 0;
}

.share-url-container input {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid var(--color-border);
    border-radius: 4px 0 0 4px;
    font-size: 14px;
}

.share-url-container .btn {
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
    border: 1px solid transparent;
    border-radius: 0 4px 4px 0;
    padding: 10px 15px;
    cursor: pointer;
}

.share-url-container .btn:hover {
    background-color: var(--color-accent-hover);
}

.share-url-container .btn .icon {
    font-size: 20px;
}

.share-note {
    color: var(--color-text-muted);
    font-size: 14px;
    margin-bottom: 10px;
}

.share-expires {
    color: var(--color-text-muted);
    font-size: 13px;
    font-style: italic;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-overlay-inverse);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.loading-overlay .btn {
    background-color: var(--color-surface);
    color: var(--color-text);
}

.spinner {
    display: inline-block;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    position: relative;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

.spinner--small {
    width: 1em;
    height: 1em;
    border: 0.15em solid currentColor;
    border-right-color: transparent;
}

.spinner--large {
    --spinner-border-width: 6px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(137deg, #F68000 21.75%, #B201D1 100%);
    -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - var(--spinner-border-width)), #000 calc(100% - var(--spinner-border-width) + 1px));
    mask: radial-gradient(farthest-side, transparent calc(100% - var(--spinner-border-width)), #000 calc(100% - var(--spinner-border-width) + 1px));
}

.spinner--large::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: conic-gradient(from 90deg, transparent 0deg 320deg, rgba(24, 28, 41, 0.4) 320deg 360deg);
    -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - var(--spinner-border-width)), #000 calc(100% - var(--spinner-border-width) + 1px));
    mask: radial-gradient(farthest-side, transparent calc(100% - var(--spinner-border-width)), #000 calc(100% - var(--spinner-border-width) + 1px));
    pointer-events: none;
}

.loading-spinner {
    margin-bottom: 20px;
}

.toast-container {
    position: fixed;
    top: calc(20px + env(safe-area-inset-top));
    right: 20px;
    z-index: 9999;
    max-width: 350px;
    width: 100%;
}

.toast {
    background-color: var(--color-elevated);
    box-shadow: var(--shadow-soft);
    border-radius: 8px;
    padding: 16px 20px;
    margin-bottom: 10px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    font-family: var(--font-main);
    font-size: 14px;
    animation: toast-in 0.3s ease-in-out forwards;
    overflow: hidden;
    position: relative;
    max-width: 100%;
    opacity: 0;
    transform: translateY(-20px);
}

.toast.error {
    border-left: 4px solid var(--color-danger);
}

.toast.success {
    border-left: 4px solid var(--color-success);
}

.toast.info {
    border-left: 4px solid var(--color-accent);
}

.toast.warning {
    border-left: 4px solid var(--color-warning);
}

.toast-content {
    flex: 1;
    margin-right: 10px;
}

.toast-close {
    font-size: 16px;
    color: var(--color-text-muted);
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    height: 20px;
    width: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-close:hover {
    color: var(--color-text);
}

.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background-color: rgba(var(--shadow-color-rgb) / 0.1);
    width: 100%;
}

.toast-progress-bar {
    height: 100%;
    width: 100%;
    background-color: var(--color-accent);
    animation: toast-progress 10s linear forwards;
}

@keyframes toast-in {
    0% {
        opacity: 0;
        transform: translateY(-20px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes toast-out {
    0% {
        opacity: 1;
        transform: translateY(0);
    }

    100% {
        opacity: 0;
        transform: translateY(-20px);
    }
}

@keyframes toast-progress {
    0% {
        width: 100%;
    }

    100% {
        width: 0%;
    }
}

@media (max-width: 768px) {
    .app-header .container {
        flex-direction: row;
        text-align: left;
    }

    .main-nav {
        margin-top: 15px;
        width: 100%;
    }

    .main-nav ul {
        justify-content: center;
    }

    .hide-on-mobile {
        display: none !important;
    }

    #user-section {
        gap: 0 !important;
    }

    .main-nav li {
        margin-left: 10px;
    }

    .main-nav a {
        padding: 8px 10px;
    }

    .btn.btn--header-checkout .text {
        display: none;
    }
}

/* Dim text while a new font is loading */
.font-loading {
    opacity: 0.5;
    transition: opacity 0.2s ease-in-out;
}

.main-nav a .icon {
    margin-right: 6px;
    font-size: 18px;
}

.btn .icon:not(:only-child) {
    margin-right: 8px;
}