:root {
    --font-xs: 0.65vw;
    --font-sm: 0.72vw;
    --font-md: 0.85vw;
    --font-lg: 1.05vw;
    --font-xl: 1.35vw;
    --font-xxl: 1.85vw;

    --space-2xs: 0.22vw;
    --space-xs: 0.32vw;
    --space-sm: 0.48vw;
    --space-md: 0.68vw;
    --space-lg: 0.92vw;
    --space-xl: 1.32vw;
    --space-xxl: 1.78vw;
    --space-xxxl: 2.35vw;

    --border-thin: 0.05vw;
    --border-medium: 0.1vw;

    --radius-sm: 0.42vw;
    --radius-md: 0.62vw;
    --radius-lg: 0.95vw;

    --shadow-soft: 0 0.85vw 2.15vw rgba(15, 23, 42, 0.12);
    --shadow-button: 0 0.55vw 1.1vw rgba(15, 118, 110, 0.25);

    --blur-backdrop: 0.35vw;

    --color-bg: #f4f7f8;
    --color-surface: #ffffff;
    --color-surface-soft: #e6eff1;
    --color-border: rgba(99, 112, 128, 0.18);
    --color-accent: #0f766e;
    --color-accent-light: #34d399;
    --color-accent-dark: #047857;
    --color-secondary: #22c55e;
    --color-text: #1f2933;
    --color-muted: #5b6775;
    --color-muted-soft: #94a3b8;
    --color-danger: #dc2626;
    --color-danger-dark: #b91c1c;
}

html,
body {
    height: 100%;
    width: 100%;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    font-size: var(--font-md);
    background: var(--color-bg);
    color: var(--color-text);
}

body.slider-only {
    display: flex;
    min-height: 100vh;
}

body.slider-only #slide_container {
    flex: 1;
    height: 100%;
}

.layout {
    display: flex;
    flex-direction: column;
    min-height: 100%;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xxl);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(var(--blur-backdrop));
    border-bottom: var(--border-thin) solid var(--color-border);
}

.top-bar h1 {
    font-size: var(--font-xxl);
    margin: 0;
    color: var(--color-accent);
}

.top-left {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.admin-nav {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--color-muted);
    text-decoration: none;
    font-weight: 600;
    padding-bottom: var(--space-xs);
    border-bottom: var(--border-medium) solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
    font-size: var(--font-sm);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.user-sub-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
}

.user-sub-nav a {
    color: var(--color-muted);
    text-decoration: none;
    padding: var(--space-sm) var(--space-lg);
    border-radius: 999%;
    border: var(--border-thin) solid var(--color-border);
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    font-size: var(--font-xs);
    background: rgba(255, 255, 255, 0.7);
}

.user-sub-nav a:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: rgba(52, 211, 153, 0.12);
}

.user-sub-nav a.active {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: rgba(52, 211, 153, 0.18);
}

.slider-sub-nav {
    width: 100%;
    align-self: flex-start;
    margin-bottom: var(--space-lg);
}

.own-password-form {
    margin-top: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.own-password-form h3 {
    margin: 0;
    font-size: var(--font-sm);
}

.card-separator {
    margin: var(--space-xl) 0;
    border: none;
    height: var(--border-thin);
    background: rgba(148, 163, 184, 0.3);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    font-size: var(--font-sm);
    color: var(--color-muted);
}

.inline-form {
    display: inline-block;
    margin: 0;
}

.image-format-form {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-xs);
}

.image-format-form select {
    margin-left: var(--space-xs);
}

.image-format-form .button-link {
    padding: 0;
}

.flash-container {
    padding: var(--space-lg) var(--space-xxl);
}

.flash {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
    color: var(--color-text);
    font-size: var(--font-sm);
}

.flash:last-child {
    margin-bottom: 0;
}

.flash-success {
    background: #4ade80;
}

.flash-error {
    background: #f87171;
}

.flash-warning {
    background: #facc15;
}

.flash-info {
    background: #38bdf8;
}

.content {
    flex: 1;
    display: flex;
    gap: 2.5vw;
    padding: 1.25vw;
}

.content.slides-layout {
    align-items: flex-start;
    flex-wrap: wrap;
}

.slider-settings {
    width: 45vw;
    max-width: 45vw;
    flex: none;
    max-height: min(calc(45vw * 9 / 16), calc(100vh - 6vw));
    overflow-y: auto;
}

.slider-settings .grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.slider-settings .card {
    width: 100%;
}

.slider-settings .image-library {
    grid-template-columns: repeat(auto-fit, minmax(8vw, 1fr));
}

.content.single-column {
    flex-direction: column;
    gap: var(--space-xl);
    padding: var(--space-xxl);
}

.half-layout {
    margin: 0;
}

.half-wrapper {
    display: flex;
    width: 100vw;
    height: 100vh;
}

.half-column {
    width: 50%;
    height: 100%;
    position: relative;
}

.half-slider-column {
    background: var(--color-surface-soft);
    overflow: hidden;
}

.half-slider-column #slide_container {
    width: 100%;
    height: 100%;
}

.half-content-column {
    background: rgba(148, 163, 184, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
}

.half-embed {
    width: 100%;
    height: 100%;
    border: none;
    background: #fff;
}

.half-embed.is-hidden {
    display: none;
}

.half-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.half-fallback img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
}

.content.single-column #viewer,
.content.single-column .management {
    width: 100%;
    max-width: 100%;
}

.content.single-column #viewer {
    height: auto;
    min-height: 0;
}

#viewer {
    flex: none;
    width: 45vw;
    max-width: 45vw;
    height: calc(45vw * 9 / 16);
    min-height: calc(45vw * 9 / 16);
    background: rgba(164, 179, 188, 0.22);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-soft);
}

#viewer.viewer-halfscreen {
    width: 45vw;
    max-width: 45vw;
    height: calc(45vw * 9 / 7);
    min-height: calc(45vw * 9 / 7);
}

#slide_container {
    width: 100%;
    height: 100%;
    position: relative;
    background: var(--color-surface-soft);
}

#slide_container img {
    position: absolute;
    top: 0;
    left: 0;
    object-fit: cover;
    width: 100% !important;
    height: 100% !important;
    opacity: 0;
    transition: opacity 0.6s ease-in-out;
}

#slide_container img.active {
    opacity: 1;
    z-index: 1;
}

.management {
    flex: none;
    width: 45vw;
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.management.full-width {
    flex: 1;
    width: 100%;
    max-width: none;
}

.management:not(.full-width) > .card {
    width: 100%;
    max-width: 70%;
    margin-left: auto;
    margin-right: auto;
}

.management:not(.full-width) > #profile-card,
.management:not(.full-width) > #create-card,
.management:not(.full-width) > #edit-card {
    max-width: 60%;
}

.management:not(.full-width) > #list-card {
    max-width: 85%;
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-soft);
    border: var(--border-thin) solid rgba(148, 163, 184, 0.12);
}

.card h2 {
    margin: 0 0 var(--space-md) 0;
    font-size: var(--font-xl);
    color: var(--color-accent);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(11.5vw, 1fr));
    gap: var(--space-xl);
}

.slider-admin-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.slider-management-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-xl);
    width: 100%;
}

#library-card {
    margin-top: 0;
}

label {
    display: block;
    font-size: var(--font-sm);
    margin-bottom: var(--space-sm);
    color: var(--color-muted);
}

label input,
label select {
    margin-top: var(--space-xs);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select {
    width: 80%;
    display: block;
    padding: var(--space-sm) var(--space-md);
    margin-left: auto;
    margin-right: auto;
    border: var(--border-thin) solid rgba(148, 163, 184, 0.35);
    border-radius: var(--radius-sm);
    background: #ffffff;
    color: var(--color-text);
    font-size: var(--font-sm);
}

input[type="file"] {
    display: block;
    margin-top: var(--space-sm);
    color: var(--color-text);
    font-size: var(--font-sm);
}

.checkbox {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-sm);
    color: var(--color-muted);
}

button {
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-xl);
    border: none;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent-dark));
    color: #ffffff;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    font-size: var(--font-sm);
}

button:hover {
    transform: translateY(-0.1vw);
    box-shadow: var(--shadow-button);
}

.button-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-xl);
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent-dark));
    color: #ffffff;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    font-size: var(--font-sm);
}

.button-link:hover {
    transform: translateY(-0.1vw);
    box-shadow: var(--shadow-button);
}

.content.single-column .card form:not(.inline-form) {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.content.single-column .card form:not(.inline-form) .button-link {
    align-self: flex-end;
}

button.secondary,
.button-secondary {
    background: linear-gradient(135deg, #2dd4bf, #0e7490);
}

button.danger,
.button-danger {
    background: linear-gradient(135deg, var(--color-danger), var(--color-danger-dark));
}

button.danger:hover,
.button-danger:hover {
    box-shadow: 0 0.55vw 1.1vw rgba(220, 38, 38, 0.25);
}

.image-library {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-lg);
}

.image-library .image-toggle-form {
    display: flex;
    width: 100%;
    margin: 0;
}

.image-toggle-button {
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    border: var(--border-thin) solid rgba(148, 163, 184, 0.18);
    background: var(--color-surface);
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
    color: var(--color-muted);
    text-align: center;
}

.image-toggle-button:hover:not(:disabled) {
    transform: translateY(-0.08vw);
    box-shadow: var(--shadow-soft);
}

.image-toggle-button img {
    width: 100%;
    border-radius: var(--radius-sm);
    aspect-ratio: 1 / 1;
    object-fit: cover;
}

.image-toggle-button span {
    font-size: var(--font-xs);
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05vw;
}

.image-toggle-button.is-assigned {
    border-color: rgba(15, 118, 110, 0.6);
    color: var(--color-accent);
    background: rgba(15, 118, 110, 0.08);
}

.image-toggle-button.is-assigned span {
    color: var(--color-danger);
}

.image-toggle-button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
    box-shadow: none;
}

.image-item {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    border: var(--border-thin) solid rgba(148, 163, 184, 0.18);
}

.image-item img {
    width: 100%;
    border-radius: var(--radius-sm);
    aspect-ratio: 1 / 1;
    object-fit: cover;
    margin-bottom: var(--space-sm);
}

.slider-select-form {
    margin-bottom: var(--space-lg);
}

.assigned-image-list {
    list-style: none;
    padding: 0;
    margin: var(--space-lg) 0 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.assigned-image-list li {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    border: var(--border-thin) solid rgba(148, 163, 184, 0.2);
    background: var(--color-surface);
}

.assigned-image-list img {
    width: 4.5vw;
    height: 3vw;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: var(--border-thin) solid rgba(148, 163, 184, 0.3);
}

.assigned-image-list .image-meta {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-2xs);
}

.assigned-image-list .image-meta span {
    font-size: var(--font-xs);
    color: var(--color-muted);
}

.assigned-image-list .image-meta .button-link {
    align-self: flex-start;
    margin-top: 0;
}

.image-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xs);
}

.image-meta span {
    font-size: var(--font-xs);
    color: var(--color-muted);
}

.slider-block {
    border: var(--border-thin) solid rgba(148, 163, 184, 0.22);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    background: var(--color-surface);
}

.slider-block:last-child {
    margin-bottom: 0;
}

.slider-block.active-slider {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 var(--border-medium) rgba(4, 120, 87, 0.18);
}

.slider-headline {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--space-lg);
    font-size: var(--font-sm);
}

.slider-actions {
    display: flex;
    gap: var(--space-md);
    margin: var(--space-md) 0;
    align-items: center;
}

.badge {
    padding: var(--space-xs) var(--space-md);
    border-radius: 999%;
    background: rgba(34, 197, 94, 0.2);
    color: var(--color-accent-dark);
    font-weight: 600;
    font-size: var(--font-xs);
}

.slider-image-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.slider-image-list li {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.slider-image-preview img {
    width: 4.7vw;
    height: 3.2vw;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: var(--border-thin) solid rgba(148, 163, 184, 0.4);
}

.slider-image-controls {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    flex: 1;
    font-size: var(--font-xs);
}

.slider-image-controls .buttons {
    display: flex;
    gap: var(--space-sm);
}

.slider-image-controls button {
    margin-top: 0;
    padding: var(--space-xs) var(--space-md);
}

.user-table {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.user-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xl);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    border: var(--border-thin) solid var(--color-border);
}

.user-row.current-user {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 var(--border-thin) rgba(4, 120, 87, 0.18);
}

.user-info-block {
    flex: 1;
    min-width: 9.5vw;
    display: flex;
    flex-direction: column;
    gap: var(--space-2xs);
}

.user-info-block strong {
    font-size: var(--font-lg);
    color: var(--color-text);
}

.user-info-block span {
    font-size: var(--font-xs);
    color: var(--color-muted);
}

.user-created {
    font-size: var(--font-xs);
    color: var(--color-muted-soft);
}

.user-level-badge {
    align-self: flex-start;
    padding: var(--space-xs) var(--space-md);
    border-radius: 999%;
    background: rgba(34, 197, 94, 0.2);
    color: var(--color-accent-dark);
    font-weight: 600;
    font-size: var(--font-xs);
}

.user-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    align-items: center;
}

.content.single-column #list-card .user-actions {
    justify-content: flex-end;
}

.user-actions button,
.user-actions .button-link {
    margin-top: 0;
}

.upload-dropzone {
    border: var(--border-medium) dashed rgba(15, 118, 110, 0.45);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    background: rgba(205, 239, 230, 0.35);
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.upload-dropzone input[type="file"] {
    display: none;
}

.upload-dropzone .dropzone-instructions {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    align-items: center;
    color: var(--color-muted);
}

.upload-dropzone .dropzone-instructions strong {
    font-size: var(--font-sm);
    color: var(--color-accent-dark);
}

.upload-dropzone .dropzone-instructions span {
    font-size: var(--font-xs);
}

.upload-dropzone .button-link {
    margin-top: var(--space-sm);
}

.upload-dropzone.is-dragover {
    border-color: var(--color-secondary);
    background: rgba(167, 243, 208, 0.45);
}

.upload-dropzone.has-files {
    border-color: rgba(15, 118, 110, 0.55);
    background: rgba(205, 239, 230, 0.55);
}

.upload-dropzone .dropzone-file-list {
    list-style: none;
    padding: 0;
    margin: var(--space-md) 0 0;
    text-align: left;
    max-height: 10vw;
    overflow-y: auto;
    font-size: var(--font-xs);
    color: var(--color-muted);
}

.upload-dropzone .dropzone-file-list li {
    padding: var(--space-2xs) 0;
    border-bottom: var(--border-thin) solid rgba(148, 163, 184, 0.2);
}

.upload-dropzone .dropzone-file-list li:last-child {
    border-bottom: none;
}

.user-inline-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    min-width: 10.5vw;
}

.user-inline-form label {
    font-size: var(--font-xs);
    text-transform: uppercase;
    letter-spacing: 0.08vw;
    color: #94a3b8;
}

.user-inline-form select,
.user-inline-form input[type="password"] {
    margin-top: var(--space-xs);
}

.user-inline-form button {
    margin-top: var(--space-xs);
    align-self: flex-start;
}

.slider-preview {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    min-height: 0;
}

.slider-preview #slide_container {
    position: absolute;
    inset: 0;
}

@media (max-width: 55vw) {
    .content {
        flex-direction: column;
        gap: var(--space-xl);
        padding: var(--space-xl);
    }

    .content.slides-layout {
        flex-direction: column;
    }

    .slider-settings {
        width: 100%;
        max-width: none;
        max-height: none;
    }

    #viewer {
        width: 100%;
        max-width: 100%;
        height: auto;
        min-height: 40vh;
    }

    .management {
        width: 100%;
        max-width: 100%;
    }

    .slider-admin-grid {
        grid-template-columns: 1fr;
    }

    .slider-management-grid {
        grid-template-columns: 1fr;
    }

    .image-library {
        grid-template-columns: 1fr;
    }

    .management:not(.full-width) > .card,
    .management:not(.full-width) > #profile-card,
    .management:not(.full-width) > #create-card,
    .management:not(.full-width) > #edit-card,
    .assigned-image-list li {
        flex-direction: column;
        align-items: flex-start;
    }

    .assigned-image-list img {
        width: 100%;
        height: auto;
    }

    .management:not(.full-width) > #list-card {
        max-width: 100%;
    }

    .top-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
}