:root {
    --text-color: #18191a;
    --background-color: #ffffff;

    --header-font: 'Plus Jakarta Sans', sans-serif;
    --header-color: #656565;
    --header-font-weight: 300;
    --thick-font-weight: 600;
    
    --accent-color: #f4f4f4;
    --border-radius: 4px;

    --width-1: 30rem;
    --width-narrow-1: 7rem;
}

a {
    text-decoration: none;
    color: inherit;
}

body {
    background-color: var(--background-color);
    background-size: 100% 30%;
    background-position: center top;
    background-attachment: scroll;
    background-repeat: repeat-y;
    margin: 0px;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    min-height: 0;
}

.main-content.drifts {
    overflow: hidden;
}

.side-by-side {
    flex: 1;
    display: flex;
    flex-direction: row;
    min-height: 0;
    gap: 1rem;
}

.header {  
    width: var(--width-1);
    margin: 0 auto 1rem auto;
    padding: 1rem 0;
    font-family: var(--header-font);
    color: var(--header-color);
    border-bottom: 0.5px solid var(--header-color);

    h1 {
        text-align: center;
        font-weight: var(--header-font-weight);
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }
}

.subheader {
    width: var(--width-1);
    margin: 0 auto;
    padding: 1rem 0;
    font-family: var(--header-font);
    color: var(--header-color);
}

.subtitle {
    text-align: center;
    font-weight: 300;
    font-size: 0.5rem;
    margin-bottom: 0;
    color: var(--header-color);
    font-family: var(--header-font);
    font-style: italic;
}

.landing-header {
    width: var(--width-1);
    margin: 5rem auto 2rem auto;
    font-family: var(--header-font);
    color: var(--header-color);

    h1 {
        text-align: center;
        font-weight: var(--header-font-weight);
        font-size: 2rem;
    }
}

.drifts-link {
    width: var(--width-1);
    font-family: var(--header-font);
    color: var(--header-color);

    display: flex;
    flex-direction: row;
    margin-bottom: 1rem;
}

.drifts-link a {
    color: var(--header-color);
    font-weight: var(--header-font-weight);
    font-size: 1rem;


    cursor: pointer;
    display: inline-block;
    padding: 0.3rem 0.5rem;
    font-size: 0.6rem;
    font-weight: 400;
    border: 1px solid #ddd;
    border-radius: 3px;
    background-color: #fff;
}
.drifts-link p {
    font-size: 0.5rem;
    color: var(--header-color);
    margin: auto auto;
}

.subtitle {
    text-align: center;
    font-weight: 300;
    font-size: 0.5rem;
    margin-bottom: 0;
    color: var(--header-color);
    font-family: var(--header-font);
    font-style: italic;
}

.projects-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
    perspective: 2000px;
}

.page {
    background-color: white;
    width: 12rem;
    height: 16rem;
    
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    overflow-wrap: break-word;
    word-wrap: break-word;
    position: relative;

    border-radius: var(--border-radius);
    border: 0.5px solid var(--header-color);

    transform-origin: center center;
    padding: 0.5rem;
    overflow: hidden;
}

.page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-color, white);
    z-index: 0;
}

.page a {
    text-decoration: underline;
    color: rgb(45, 44, 44);
}
.page:hover {
    z-index: 100;
    transform: scale(1.1);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

.project-name {
    padding: 0.6rem;
    font-size: 0.6rem;
    color: var(--text-color, #18191a);
    transition: all 0.3s ease;
    font-family: 'Georgia', serif;
    font-weight: 600;
}
.project-description {
    padding: 0 0.6rem 0.6rem;
    font-size: 0.5rem;
    color: var(--text-color, #050505);
    transition: all 0.3s ease;
    font-family: 'Georgia', serif;
}
.project-metadata {
    padding: 0 0.6rem 0.6rem;
    font-family: 'Georgia', serif;
    font-size: 0.45rem;
    color: var(--text-color, #888);
    line-height: 1.4;
    transition: all 0.3s ease;
    font-style: italic;
}
.project-metadata div {
    margin-bottom: 0.1rem;
}
.project-image {
    width: 100%;
    max-height: 60%;
    object-fit: contain;
    opacity: 1.0;
    flex-shrink: 0;
    order: 0;
    align-self: flex-start;
    position: relative;
    z-index: 1;
}
.project-content {
    position: relative;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    flex: 1;
    min-height: 0;
    order: 1;
    z-index: 1;
}

.tag-header {
    width: 0;
    height: 0;
    overflow: visible;
    position: relative;
}

.tag-header + .page {
    position: relative;
}

.tag-header + .page::before {
    content: attr(data-tag);
    box-sizing: border-box;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    font-style: italic;
    font-family: 'Georgia', serif;
    font-size: 1.5rem;
    color: #020116;
    font-weight: 600;
    /* Sticky note / label background with texture */
    background: 
        /* Paper texture overlay */
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(255,255,255,0.1) 2px,
            rgba(255,255,255,0.1) 4px
        ),
        /* Subtle grain */
        radial-gradient(circle at 30% 40%, rgba(255,255,255,0.2) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(0,0,0,0.03) 0%, transparent 50%),
        /* Rich yellow gradient */
        linear-gradient(135deg, 
            #ffe66d 0%,
            #ffd93d 25%,
            #ffe156 50%,
            #ffd829 75%,
            #ffe156 100%
        );
    height: 3rem;
    width: 12rem;
    padding: 0.5rem 1rem;
    z-index: 50;
    position: absolute;
    top: 1rem;
    left: 1rem;
    /* Deep shadow with curl effect */
    box-shadow: 
        /* Bottom right curl shadow */
        8px 8px 12px rgba(0,0,0,0.25),
        /* Main shadow */
        0 6px 20px rgba(0,0,0,0.2),
        0 3px 6px rgba(0,0,0,0.15),
        /* Edge definition */
        inset 0 0 0 1px rgba(255,255,255,0.3),
        inset 1px 1px 0 rgba(255,255,255,0.5),
        /* Top lighting */
        inset 0 2px 4px rgba(255,255,255,0.4),
        /* Bottom shadow */
        inset 0 -1px 2px rgba(0,0,0,0.1);
    /* Slightly irregular corners */
    border-radius: 3px 2px 4px 1px;
    /* More interesting imperfect edges */
    clip-path: polygon(
        0.5% 1%, 2% 0.3%, 98% 0%, 99.5% 0.5%, 
        100% 2%, 100% 97%, 99% 99.5%, 98% 100%, 
        2% 100%, 0.5% 99%, 0% 97%, 0% 2%
    );
    transform: translate(0px, 16rem) rotate(-3deg);
    transition: all 0.3s ease;
    }

.tag-filter-label {
    margin-bottom: 0.8rem;
    font-weight: var(--header-font-weight);
    font-size: 0.7rem;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.06rem;
}

.tag-filter-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tag-filter-button {
    cursor: pointer;
    display: inline-block;
    padding: 0.3rem 0.5rem;
    font-size: 0.6rem;
    font-weight: 400;
    color: #666;
    border: 1px solid #ddd;
    border-radius: 3px;
    background-color: #fff;
    transition: all 0.2s ease;
    user-select: none;
}

.tag-filter-button:hover {
    border-color: #999;
    background-color: #f0f0f0;
}

.tag-filter-button.active {
    background-color: var(--header-color);
    color: #fff;
    border-color: var(--header-color);
}

.tag-filter-button.active:hover {
    color: var(--header-color);
    background-color: var(--background-color);
}

.tag-filter-checkbox {
    display: none;
}

#tag-filters {
    font-family: var(--header-font);
    font-size: 0.7rem;
    width: var(--width-1);
    margin-bottom: 1rem;
}

.project-date {
    font-size: 0.45rem;
    color: var(--text-color, #999);
    font-weight: 300;
    margin-left: 0.5rem;
    opacity: 0.7;
}

.tag-filter-button {
    position: relative;
}

.tag-filter-button .tag-tooltip {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 0.5rem;
    padding: 0.4rem 0.6rem;
    background-color: #18191a;
    color: #fff;
    font-size: 0.65rem;
    border-radius: 4px;
    white-space: nowrap;
    z-index: 1000;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    pointer-events: none;
    max-width: 200px;
    white-space: normal;
}

.tag-filter-button .tag-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: #18191a;
}

.tag-filter-button:hover .tag-tooltip {
    visibility: visible;
    opacity: 1;
}


.options-bar {
    position: absolute;
    right: 1rem;
    top: 1rem;
    display: flex;
    flex-direction: row;
    gap: 0.5rem;
}

.options-btn {
    cursor: pointer;
    padding: 0.3rem 0.5rem;
    font-size: 0.6rem;
    font-weight: 400;
    border: 1px solid #ddd;
    border-radius: 3px;
    background-color: #fff;
    font-family: var(--header-font);
    color: var(--header-color);
    transition: all 0.2s ease;
}

.options-btn:hover {
    border-color: #999;
    background-color: #f0f0f0;
}

.content-layout {
    display: flex;
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.content-layout {
    display: flex;
    gap: 1.5rem;
    max-width: 60rem;
    margin: 0 auto;
}

.documents-container {
    flex: 1;
    max-height: 60vh;
    overflow-y: auto;
    padding: 0;
}

.document-item {
    padding: 1rem;
    margin: 0.5rem 0;
    cursor: pointer;
    background-color: white;
    border: 0.5px solid var(--header-color);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    font-family: var(--header-font);
}

.document-item:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.document-item.selected {
    border: 1.4px solid var(--header-color);
    background-color: var(--accent-color);
}

.doc-meta {
    font-size: 0.5rem;
    color: var(--header-color);
    margin-top: 0.5rem;
}

.document-detail {
    width: 40%;
    height: 100%;
    background-color: white;
    font-family: var(--header-font);
    color: var(--text-color);
    overflow-y: auto;
    padding: 1rem;
}

.spacer {
    height: 20vh;
}

.detail-actions.empty button {
    width: 100%;
}

.document-detail.empty {
    
}

.document-header {
    border-bottom: 0.5px solid var(--header-color);
}

.errors {
    width: var(--width-1);
    margin: 0 auto 1rem auto;
    padding: 0.8rem;
    font-family: var(--header-font);
    font-size: 0.6rem;
    color: var(--header-color);
    background-color: var(--accent-color);
    border-radius: var(--border-radius);
    text-align: center;
    display: none;
}

.document-title-input {
    width: 4rem;
    /* elipses */
    text-overflow: ellipsis;
    padding: 0.6rem 0;
    border: none;
    font-size: 1rem;
    font-weight: var(--header-font-weight);
    background: transparent;
    font-family: var(--header-font);
    color: var(--text-color);
}

.document-title-input:focus {
    width: 100%;
}

.document-title-input:focus {
    outline: none;
    border-bottom: 0.5px solid var(--header-color);
}

.document-metadata {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.metadata-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.metadata-label {
    font-size: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.06rem;
    color: var(--header-color);
    font-weight: 400;
}

.metadata-value {
    font-size: 0.6rem;
    color: var(--text-color);
}

.other-documents {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 0.5px solid var(--header-color);
}

.other-documents h4 {
    font-size: 0.7rem;
    margin-bottom: 0.8rem;
    color: var(--text-color);
    font-weight: var(--header-font-weight);
}

.compact-doc-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.compact-doc-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 1rem;
    background-color: white;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s;
    border: 0.5px solid var(--header-color);
}

.compact-doc-item:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.compact-doc-title {
    font-size: 0.6rem;
    font-weight: 400;
}

.compact-doc-date {
    font-size: 0.5rem;
    color: var(--header-color);
}

.detail-section {
    margin: 0.8rem 0;
    display: flex;
    flex-direction: row;
    gap: 0.5rem;
    font-size: 0.6rem;
}

.detail-label {
    font-weight: 600;
}

.document-content-preview {
    max-height: 20rem;
    overflow-y: auto;
    padding: 1.5rem;
    font-size: 0.6rem;
    line-height: 1.6;
    border-radius: var(--border-radius);
    margin: 1rem 0;
    border: 0.5px solid var(--header-color);
    /* need to show /n */
    white-space: pre-line;
}

#document-title-input {
    flex: 1;
    padding: 0.5rem;
    border: none;
    font-size: 0.8rem;
    background: transparent;
    font-family: var(--header-font);
}

.image-preview {
    margin: 1.5rem 0;
    max-width: calc(100% - 2rem);
    text-align: center;
}

.image-preview img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
}

.levels-container {
    width: 60%;
    display: flex;
    flex-wrap: wrap;
    row-gap: 0rem;
    column-gap: 1.5rem;
    justify-content: center;
    overflow-y: auto;
    height: 100%;
    align-content: flex-start;
}

.level-box-wrapper {
    position: relative;
    height: 20rem;
    width: calc(20rem * 8.5 / 11);
    margin-bottom: 3rem;
}


.level-box {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    background-color: white;
    border-radius: var(--border-radius);
    border: 0.5px solid var(--header-color);
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
    font-family: var(--header-font);
}

.level-image-inside {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: top;
    /* opacity: 0.3; */
    z-index: 0;
    border-radius: var(--border-radius);
}

.level-box > *:not(.level-image-inside) {
    position: relative;
    z-index: 1;
}

.level-box.locked {
    opacity: 0.4;
    pointer-events: none;
}

.level-box.selected {
    border: 1.4px solid var(--header-color);
}

.level-box-wrapper.selected .level-box {
    border: 1.4px solid var(--header-color);
}

.level-box:not(.locked):hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.level-box.completed:hover {

}

.level-info {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.level-name {
    font-weight: 600;
    font-size: 0.7rem;
    margin-bottom: 0.25rem;
}

.level-editor {
    font-size: 0.5rem;
    color: var(--header-color);
    font-weight: 300;
}

.level-lock {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 0.8rem;
}

.drift-header {
    width: 100%;
    font-size: 1rem;
    font-weight: var(--header-font-weight);
    font-family: var(--header-font);
    color: var(--header-color);
    margin: 1rem 0;
    padding: 0 1rem;
}

button {
    cursor: pointer;
    padding: 0.4rem 0.8rem;
    font-size: 0.6rem;
    font-weight: 400;
    border: 1px solid #ddd;
    border-radius: 3px;
    background-color: #fff;
    font-family: var(--header-font);
    color: var(--header-color);
    transition: all 0.2s ease;
}

button:hover {
    border-color: #999;
    background-color: #f0f0f0;
}

button:active {
    transform: translateY(0);
}


.options-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.options-content {
    background: white;
    padding: 2rem;
    max-width: 25rem;
    border-radius: var(--border-radius);
    font-family: var(--header-font);
    font-size: small;
}

.options-content h2 {
    margin-top: 0;
    font-weight: var(--thick-font-weight);
    font-size: 1.5rem;
    color: var(--text-color);
}

.options-content h3 {
    font-weight: var(--header-font-weight);
    font-size: 0.8rem;
    color: var(--header-color);
    margin: 1rem 0 0.5rem 0;
}

.options-section {
    margin: 1.5rem 0;
    font-size: 0.6rem;
    color: var(--header-color);
}

.options-section button {
    margin: 0.25rem;
}

.save-status {
    margin: 0.5rem 0;
    font-size: 0.6rem;
    color: var(--header-color);
    font-style: italic;
}

#fileInput {
    display: none;
}

.landing-container {
    max-width: var(--width-1);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

.landing-section {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    font-family: var(--header-font);
}

.landing-section h2 {
    font-weight: var(--header-font-weight);
    font-size: 1rem;
    margin: 1rem 0 1rem 0;
    color: var(--header-color);
}

.primary-btn {
    font-size: 0.8rem;
    padding: 0.8rem 2rem;
    font-weight: 400;
    border: 1px solid #ddd;
    border-radius: 3px;
    background-color: #fff;
    color: var(--header-color);
}

.primary-btn:hover {
    border-color: #999;
    background-color: #f0f0f0;
}

.drift-option {
    padding: 1rem;
    margin: 0.5rem 0;
    background-color: var(--accent-color);
    border-radius: var(--border-radius);
    text-align: left;
    font-size: 0.6rem;
}

.drift-option.clickable {
    cursor: pointer;
    transition: all 0.3s ease;
}

.drift-option.clickable:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.drift-desc {
    margin-top: 0.5rem;
    font-size: 0.5rem;
    color: var(--header-color);
    font-style: italic;
}

.new-game-section {
    margin: 1rem 0;
}

.new-game-section h3 {
    font-weight: var(--header-font-weight);
    font-size: 0.8rem;
    margin-bottom: 0.8rem;
    color: var(--text-color);
}

.warning-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}

.warning-buttons button {
    width: 100%;
    padding: 0.8rem;
    text-align: center;
}

.backup-btn {
    background-color: #fff;
    border: 1px solid #ddd;
}

.warning-btn {
    background-color: #ffdddd;
    border: 1px solid #ffaaaa;
    color: #cc0000;
}

.warning-btn:hover {
    background-color: #ffcccc;
    border-color: #ff8888;
}

.save-info-item {
    margin: 0.5rem 0;
    font-size: 0.6rem;
    color: var(--header-color);
}

.button-group {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.landing-section .button-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;

    button {
        background-color: var(--header-color);
        color: var(--background-color);
        font-size: 0.6rem;
        width: var(--width-narrow-1);
        height: fit-content;
        padding: 0.23vw;
        border: none;
    }
}