/* UI Components: Modals, Toasts, Spinners */

/* Spinner Animation */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
    vertical-align: middle;
}

/* Keep the idle state hidden even when utility styles have lower priority. */
.spinner.hidden {
    display: none;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    left: max(1rem, env(safe-area-inset-left));
    right: max(1rem, env(safe-area-inset-right));
    bottom: max(1rem, env(safe-area-inset-bottom));
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
}

.toast {
    pointer-events: auto;
    width: min(420px, calc(100vw - 2rem));
    min-width: 0;
    padding: 1rem 1.25rem;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    gap: 1rem;
    transform: translateY(1rem) scale(0.95);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.show {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.toast-success {
    border-left: 4px solid #10b981;
}

.toast-error {
    border-left: 4px solid #ef4444;
}

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

.toast-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-message {
    flex: 1;
    color: var(--text-main);
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
}

.toast-close {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    color: var(--text-meta);
    border-radius: var(--radius-sm);
    transition: color 0.2s ease, background-color 0.2s ease;
}

.toast-close:hover {
    color: var(--text-main);
    background: rgba(var(--accent-rgb), 0.1);
}

/* Modal System */
#appModal {
    transition: visibility 0.3s linear, opacity 0.3s ease;
}

#appModal.hidden {
    display: none;
    opacity: 0;
    visibility: hidden;
}

#appModal:not(.hidden) {
    display: flex;
    opacity: 1;
    visibility: visible;
}

#appModal .modal-overlay {
    transition: backdrop-filter 0.4s ease, background-color 0.4s ease;
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
}

#appModal.show .modal-overlay {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background-color: var(--overlay-bg);
}

#appModal .modal-container {
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
    transform: scale(0.9) translateY(10px);
    opacity: 0;
}

#appModal.show .modal-container {
    transform: scale(1) translateY(0);
    opacity: 1;
}

/* Button Loading State */
.btn-loading {
    pointer-events: none;
    opacity: 0.8;
}

.btn-loading .spinner {
    display: inline-block !important;
}

.article-external-link {
    text-decoration-style: dotted;
    text-underline-offset: 0.18em;
}

.article-link-preview-card {
    position: absolute;
    z-index: 10001;
    width: min(360px, calc(100vw - 32px));
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--glass-bg);
    color: var(--text-body);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.32);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(6px) scale(0.98);
    transform-origin: var(--article-link-arrow-left, 50%) bottom;
    transition: opacity 160ms ease,
    visibility 160ms ease,
    transform 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

.article-link-preview-card.is-visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scale(1);
}

.article-link-preview-card.is-measuring {
    transition: none;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
}

.article-link-preview-card.is-below {
    transform-origin: var(--article-link-arrow-left, 50%) top;
}

.article-link-preview-card.is-above .article-link-preview-arrow {
    bottom: -7px;
    transform: translateX(-50%) rotate(45deg);
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.article-link-preview-card.is-below .article-link-preview-arrow {
    top: -7px;
    transform: translateX(-50%) rotate(45deg);
    border-left: 1px solid var(--border);
    border-top: 1px solid var(--border);
}

.article-link-preview-arrow {
    position: absolute;
    left: var(--article-link-arrow-left, 50%);
    width: 14px;
    height: 14px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.article-link-preview-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.article-link-preview-icon {
    width: 22px;
    height: 22px;
    border-radius: 4px;
    object-fit: cover;
}

.article-link-preview-title {
    min-width: 0;
    color: var(--text-main);
    font-size: 14px;
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.article-link-preview-url {
    color: var(--accent);
    font-size: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.article-link-preview-description {
    margin-top: 8px;
    color: var(--text-meta);
    font-size: 12px;
    line-height: 1.5;
}

.pjax-article-transition-clone {
    position: fixed !important;
    z-index: 10000;
    box-sizing: border-box;
    margin: 0 !important;
    overflow: hidden;
    pointer-events: none;
    transform-origin: left top;
    will-change: left, top, width, height, font-size, line-height;
}

.pjax-article-transition-clone::before,
.pjax-article-transition-clone::after {
    display: none !important;
}

.pjax-article-transition-target-hidden {
    visibility: hidden !important;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
    filter: grayscale(0.2);
}

/* Vditor Preview Theme Overrides */
.vditor-reset {
    color: var(--text-body) !important;
    background: transparent !important;
}

.vditor-reset h1,
.vditor-reset h2,
.vditor-reset h3 {
    color: var(--text-main) !important;
    border-bottom: none !important;
}

.vditor-reset code {
    background: var(--input-bg) !important;
    color: var(--accent) !important;
}

.vditor-reset pre {
    background: var(--card-bg) !important;
    border: 1px solid var(--border) !important;
}
.pjax-status {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    max-width: calc(100vw - 2rem);
    padding: .75rem 1rem;
    border: 1px solid var(--border);
    border-radius: .75rem;
    background: var(--card-bg);
    color: var(--text-main);
    box-shadow: 0 4px 20px rgba(0, 0, 0, .35);
}
.pjax-status[hidden] { display: none; }
.pjax-status button, .pjax-status a {
    margin-left: .75rem;
    text-decoration: underline;
    cursor: pointer;
}
.pjax-status button {
    border: 1px solid var(--accent);
    border-radius: .4rem;
    padding: .2rem .55rem;
    color: var(--accent);
    background: transparent;
}
.pjax-status a { color: var(--accent); }
@media (prefers-reduced-motion: reduce) {
    #pjax-progress { transition: none !important; }
}

/* Old WindBlog pagination: the O in BLOG is the page input. */
.windblog-pagination {
    --pagination-surface: #f4f7fb;
    --pagination-border: #d2dbe6;
    --pagination-ink: #29313b;
    --pagination-muted: #99a5b5;
    --pagination-accent: #1668d9;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: clamp(.65rem, 2.5vw, 1.25rem);
    width: 100%;
    padding: 2.25rem 0 1rem;
    color: var(--pagination-ink);
}

.windblog-pagination-arrows {
    display: flex;
    gap: .8rem;
    padding-top: .15rem;
}

.windblog-pagination-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3.65rem;
    height: 3.65rem;
    border: 1px solid var(--pagination-border);
    border-radius: 999px;
    color: #566272;
    font-family: var(--font-mono);
    font-size: 1.55rem;
    font-weight: 500;
    line-height: 1;
    cursor: pointer;
    text-decoration: none;
    transition: color .2s ease, border-color .2s ease, background-color .2s ease, transform .2s ease;
}

.windblog-pagination-arrow:hover,
.windblog-pagination-arrow:focus-visible {
    border-color: var(--pagination-accent);
    color: var(--pagination-accent);
    background: color-mix(in srgb, var(--pagination-accent) 7%, transparent);
    transform: translateY(-1px);
}

.windblog-pagination-arrow.is-disabled {
    color: var(--pagination-muted);
    opacity: .58;
}

.windblog-pagination-arrow.is-disabled:hover,
.windblog-pagination-arrow.is-disabled:focus-visible {
    border-color: var(--pagination-border);
    color: var(--pagination-muted);
    background: transparent;
    transform: none;
}

@keyframes windblog-pagination-denied {
    0%, 100% {
        border-color: #ef4444;
        color: #ef4444;
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
        transform: translateX(0);
    }
    20% {
        box-shadow: 0 0 0 4px rgba(239, 68, 68, .18);
        transform: translateX(-4px);
    }
    40% {
        transform: translateX(4px);
    }
    60% {
        box-shadow: 0 0 0 4px rgba(239, 68, 68, .08);
        transform: translateX(-3px);
    }
    80% {
        transform: translateX(3px);
    }
}

/* PJAX page-jump loading flight for the Go control. */
.windblog-pagination-go.is-loading .windblog-pagination-go-label {
    opacity: 0;
    transition: opacity .18s ease;
}

.windblog-pagination-flight {
    position: fixed;
    top: var(--pagination-flight-top);
    left: var(--pagination-flight-left);
    z-index: 10020;
    width: var(--pagination-flight-width);
    height: var(--pagination-flight-height);
    border-radius: 999px;
    background: var(--pagination-accent, #1668d9);
    box-shadow: 0 8px 20px rgba(22, 104, 217, .24);
    pointer-events: none;
    transform-origin: center;
    will-change: transform, opacity;
}

.windblog-pagination-flight-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2.35rem;
    height: 2.35rem;
    border: .22rem solid rgba(255, 255, 255, .35);
    border-top-color: #fff;
    border-right-color: #fff;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: windblog-pagination-flight-spin .72s linear infinite;
}

.windblog-pagination-flight-circle::after {
    position: absolute;
    top: 50%;
    left: 50%;
    width: .34rem;
    height: .34rem;
    border-radius: 50%;
    background: #fff;
    content: "";
    transform: translate(-50%, -50%);
}

.windblog-pagination-flight-rocket {
    position: absolute;
    top: 50%;
    left: 50%;
    display: block;
    color: #fff;
    font-size: 1.65rem;
    line-height: 1;
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-45deg);
}

@keyframes windblog-pagination-flight-spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

@keyframes windblog-pagination-flight-path {
    0% {
        opacity: 1;
        transform: translate3d(0, 0, 0) rotate(0deg) scale(1);
    }
    52% {
        opacity: 1;
        transform: translate3d(-2.7rem, 0, 0) rotate(360deg) scale(1);
    }
    68% {
        opacity: 1;
        transform: translate3d(-2.7rem, 0, 0) rotate(360deg) scale(.82);
    }
    100% {
        opacity: 0;
        transform: translate3d(-2.7rem, -110vh, 0) rotate(-45deg) scale(.3);
    }
}

@keyframes windblog-pagination-flight-rocket {
    0%, 50% {
        opacity: 0;
    }
    68%, 100% {
        opacity: 1;
    }
}

.windblog-pagination-flight.is-flying {
    animation: windblog-pagination-flight-path 1.08s cubic-bezier(.18, .82, .24, 1) forwards;
}

.windblog-pagination-flight.is-flying .windblog-pagination-flight-circle {
    animation: windblog-pagination-flight-spin .34s cubic-bezier(.18, .82, .24, 1) 1 forwards;
}

.windblog-pagination-flight.is-flying .windblog-pagination-flight-rocket {
    animation: windblog-pagination-flight-rocket 1.08s ease forwards;
}

@media (prefers-reduced-motion: reduce) {
    .windblog-pagination-go.is-loading .windblog-pagination-go-label {
        transition: none;
    }

    .windblog-pagination-flight-circle {
        animation: none;
    }

    .windblog-pagination-flight.is-flying {
        animation: windblog-pagination-flight-path .01s linear forwards;
    }

    .windblog-pagination-flight.is-flying .windblog-pagination-flight-circle,
    .windblog-pagination-flight.is-flying .windblog-pagination-flight-rocket {
        animation: none;
    }

    .windblog-pagination-flight.is-flying .windblog-pagination-flight-rocket {
        opacity: 1;
    }
}

.windblog-pagination-arrow.is-disabled.is-denied {
    opacity: 1;
    animation: windblog-pagination-denied .46s ease-in-out;
}

.windblog-pagination-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: min(31rem, 55vw);
}

.windblog-pagination-title {
    display: flex;
    align-items: center;
    height: 3.65rem;
    white-space: nowrap;
    font-family: var(--font-sans);
    font-size: clamp(2.15rem, 4vw, 2.75rem);
    font-weight: 800;
    letter-spacing: 0;
    line-height: 1;
}

.windblog-pagination-fixed {
    display: inline-block;
    letter-spacing: .19em;
}

.windblog-pagination-n-pages {
    display: inline-flex;
    align-items: stretch;
    gap: .03em;
    margin: 0 .02em;
    height: 3.65rem;
}

.windblog-pagination-n-page {
    position: relative;
    display: inline-flex;
    height: 3.65rem;
    min-width: .72em;
}

.windblog-pagination-n-letter {
    position: absolute;
    top: 50%;
    left: 50%;
    display: block;
    line-height: 1;
    letter-spacing: 0;
    transform: translate(-50%, -50%);
}

.windblog-pagination-n-page .windblog-pagination-page {
    position: absolute;
    top: calc(50% + 1.55rem);
    left: 50%;
    min-width: 100%;
    font-size: 1rem;
    line-height: 1;
    transform: translateX(-50%);
}

.windblog-pagination-page-input {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.85rem;
    height: 2.85rem;
    margin-left: .08em;
    border: 1px solid var(--pagination-border);
    border-radius: 999px;
    background: var(--pagination-surface);
    transition: border-color .25s ease, box-shadow .25s ease, background-color .25s ease;
}

.windblog-pagination-page-input input {
    width: 100%;
    height: 100%;
    padding: 0;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--pagination-muted);
    font: inherit;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0;
    line-height: 1;
    text-align: center;
    -moz-appearance: textfield;
}

.windblog-pagination-page-input input::-webkit-outer-spin-button,
.windblog-pagination-page-input input::-webkit-inner-spin-button {
    margin: 0;
    -webkit-appearance: none;
}

.windblog-pagination-form:focus-within .windblog-pagination-page-input {
    border-color: #a8c2f4;
    box-shadow: 0 0 0 3px rgba(22, 104, 217, .16);
}

.windblog-pagination-go {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    box-sizing: border-box;
    width: 2.7rem;
    height: 3.35rem;
    margin-left: .12em;
    overflow: hidden;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--pagination-ink);
    cursor: pointer;
    font: inherit;
    font-size: 2.35rem;
    font-weight: 800;
    letter-spacing: .02em;
    line-height: 1;
    padding: 0 .35rem;
    transition: width .34s cubic-bezier(.22, 1, .36, 1), color .2s ease, background-color .34s ease;
}

.windblog-pagination-go-label {
    display: inline-flex;
    align-items: center;
    gap: .12em;
    white-space: nowrap;
}

.windblog-pagination-form:focus-within .windblog-pagination-go {
    width: 5.7rem;
    background: var(--pagination-accent);
    color: #fff;
    letter-spacing: .01em;
}

.windblog-pagination-go-extra {
    opacity: 0;
    transition: opacity .2s ease;
}

.windblog-pagination-form:focus-within .windblog-pagination-go-extra {
    opacity: 1;
}

.windblog-pagination-go:focus-visible {
    outline: 3px solid rgba(22, 104, 217, .28);
    outline-offset: 2px;
}

.windblog-pagination-page {
    color: #566272;
    font-family: var(--font-mono);
    font-weight: 700;
    text-align: center;
    text-decoration: none;
    transition: color .2s ease, transform .2s ease;
}

@keyframes windblog-pagination-invalid {
    0%, 100% {
        border-color: #ef4444;
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
        transform: translateX(0);
    }
    20% {
        box-shadow: 0 0 0 4px rgba(239, 68, 68, .18);
        transform: translateX(-4px);
    }
    40% {
        transform: translateX(4px);
    }
    60% {
        box-shadow: 0 0 0 4px rgba(239, 68, 68, .08);
        transform: translateX(-3px);
    }
    80% {
        transform: translateX(3px);
    }
}

.windblog-pagination-page-input.is-invalid {
    border-color: #ef4444;
    animation: windblog-pagination-invalid .46s ease-in-out;
}

.windblog-pagination-go.is-invalid {
    opacity: 1;
    background: #ef4444;
    color: #fff;
    animation: windblog-pagination-invalid .46s ease-in-out;
}

.windblog-pagination-form:focus-within .windblog-pagination-go.is-invalid {
    background: #ef4444;
    color: #fff;
}

.windblog-pagination-page:hover,
.windblog-pagination-page:focus-visible,
.windblog-pagination-page.is-current {
    color: var(--pagination-accent);
}

.windblog-pagination-page:hover,
.windblog-pagination-page:focus-visible {
    transform: translateY(-1px);
}

.windblog-pagination-n-page .windblog-pagination-page:hover,
.windblog-pagination-n-page .windblog-pagination-page:focus-visible {
    transform: translate(-50%, -1px);
}

.windblog-pagination-status {
    margin-top: .62rem;
    color: var(--pagination-muted);
    font-size: 1.05rem;
    letter-spacing: .04em;
}

@media (prefers-color-scheme: dark) {
    :root:not(.light) .windblog-pagination {
        --pagination-surface: #151b24;
        --pagination-border: #303b4a;
        --pagination-ink: #e4e9f0;
        --pagination-muted: #8491a2;
    }
}

@media (max-width: 700px) {
    .windblog-pagination {
        gap: .35rem;
        padding-top: 1.5rem;
    }

    .windblog-pagination-arrows {
        gap: .3rem;
    }

    .windblog-pagination-arrow {
        width: 2.55rem;
        height: 2.55rem;
        font-size: 1.2rem;
    }

    .windblog-pagination-form {
        min-width: 0;
        max-width: calc(100vw - 6.2rem);
    }

    .windblog-pagination-title {
        font-size: clamp(1.2rem, 6.6vw, 2rem);
        letter-spacing: .12em;
    }

    .windblog-pagination-page-input {
        width: 2.2rem;
        height: 2.2rem;
    }

    .windblog-pagination-go {
        box-sizing: border-box;
        height: 2.7rem;
        font-size: 1.7rem;
    }

    .windblog-pagination-form:focus-within .windblog-pagination-go {
        width: 5.9rem;
        font-size: 1.7rem;
    }

    .windblog-pagination-status {
        font-size: .82rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .windblog-pagination-arrow,
    .windblog-pagination-go,
    .windblog-pagination-page-input,
    .windblog-pagination-page {
        transition: none;
    }

    .windblog-pagination-go-extra {
        transition: none;
    }

    .windblog-pagination-page-input.is-invalid {
        animation: none;
        border-color: #ef4444;
        box-shadow: 0 0 0 4px rgba(239, 68, 68, .12);
    }

    .windblog-pagination-go.is-invalid {
        animation: none;
        background: #ef4444;
        color: #fff;
        box-shadow: 0 0 0 4px rgba(239, 68, 68, .12);
    }

    .windblog-pagination-form:focus-within .windblog-pagination-go.is-invalid {
        background: #ef4444;
        color: #fff;
    }

    .windblog-pagination-arrow.is-disabled.is-denied {
        animation: none;
        border-color: #ef4444;
        color: #ef4444;
        box-shadow: 0 0 0 4px rgba(239, 68, 68, .12);
    }
}