:root {
    --ink: #161a1d;
    --muted: #5f6b72;
    --line: #d9e0e3;
    --paper: #f7f9fa;
    --surface: #ffffff;
    --teal: #00897b;
    --teal-deep: #00695c;
    --coral: #e4572e;
    --gold: #f4b942;
    --green: #2e7d32;
    --red: #b3261e;
    --shadow: 0 18px 45px rgba(22, 26, 29, 0.10);
}

* {
    box-sizing: border-box;
}

html {
    min-width: 320px;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
    font: inherit;
    letter-spacing: 0;
}

button {
    border: 0;
}

.app-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.topbar {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    padding: 28px clamp(18px, 4vw, 56px);
    background: var(--surface);
    border-bottom: 1px solid var(--line);
}

.eyebrow {
    margin: 0 0 6px;
    color: var(--teal-deep);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.topbar h1,
.empty-state h2,
.pane-heading h2,
.timeline-panel h2,
.render-panel h2,
.import-group h2 {
    margin: 0;
    color: var(--ink);
    font-weight: 800;
    line-height: 1.05;
}

.topbar h1 {
    max-width: 680px;
    font-size: clamp(2rem, 6vw, 4.25rem);
}

.tool-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 8px;
    max-width: 560px;
}

.tool-nav a {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 9px 12px;
    color: var(--ink);
    background: var(--surface);
    text-decoration: none;
    font-weight: 700;
}

.tool-nav a:hover,
.tool-nav a.active {
    color: #ffffff;
    background: var(--ink);
    border-color: var(--ink);
}

.workspace {
    width: min(1440px, 100%);
    margin: 0 auto;
    padding: 26px clamp(16px, 4vw, 56px) 36px;
    display: grid;
    gap: 22px;
}

.import-panel,
.editor-panel,
.empty-state,
.tool-panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.import-panel {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    padding: 18px;
}

.import-group {
    min-width: 0;
    display: grid;
    align-content: start;
    gap: 14px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fbfcfc;
}

.import-group h2,
.pane-heading h2,
.timeline-panel h2,
.render-panel h2 {
    font-size: 1.12rem;
}

.import-group p,
.empty-state p {
    margin: 7px 0 0;
    color: var(--muted);
}

.control-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: end;
}

.input-field {
    min-width: 0;
    display: grid;
    gap: 6px;
}

.input-field label {
    color: var(--muted);
    font-size: 0.86rem;
    font-weight: 800;
}

.input-field input {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--ink);
    background: var(--surface);
}

.input-field input:focus,
.select-field select:focus {
    outline: 3px solid rgba(0, 137, 123, 0.18);
    border-color: var(--teal);
}

.primary-action,
.secondary-action,
.render-action {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 8px;
    padding: 10px 16px;
    font-weight: 800;
    cursor: pointer;
}

.primary-action,
.render-action {
    color: #ffffff;
    background: var(--teal);
}

.primary-action:hover,
.render-action:hover {
    background: var(--teal-deep);
}

.secondary-action {
    color: var(--ink);
    background: #eef4f3;
    border: 1px solid var(--line);
}

.secondary-action:hover {
    background: #dfeceb;
}

.status-message {
    grid-column: 1 / -1;
    min-height: 42px;
    display: flex;
    align-items: center;
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--muted);
    background: #eef4f3;
    font-weight: 750;
}

.status-message.info {
    color: #1f5f7a;
    background: #eaf5f8;
}

.status-message.success {
    color: var(--green);
    background: #edf7ef;
}

.status-message.error {
    color: var(--red);
    background: #fff0ed;
}

.empty-state {
    min-height: 360px;
    display: grid;
    grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1fr);
    align-items: center;
    gap: 28px;
    padding: clamp(22px, 4vw, 44px);
}

.empty-state h2 {
    max-width: 720px;
    font-size: clamp(1.8rem, 4vw, 3.4rem);
}

.empty-state p {
    max-width: 640px;
    font-size: 1rem;
}

.empty-visual {
    position: relative;
    min-height: 260px;
    border-radius: 8px;
    overflow: hidden;
    background:
        linear-gradient(135deg, rgba(0, 137, 123, 0.22), rgba(244, 185, 66, 0.22)),
        repeating-linear-gradient(90deg, #1d2528 0 16px, #f7f9fa 16px 24px);
}

.film-frame,
.film-frame.small {
    position: absolute;
    inset: 42px 28px auto;
    height: 130px;
    border: 8px solid #ffffff;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--coral), var(--gold));
    box-shadow: 0 18px 35px rgba(22, 26, 29, 0.18);
}

.film-frame.small {
    inset: auto 58px 36px 82px;
    height: 86px;
    background: linear-gradient(135deg, var(--teal), #83c5be);
}

.play-glyph {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-top: 24px solid transparent;
    border-bottom: 24px solid transparent;
    border-left: 34px solid #ffffff;
    transform: translate(-35%, -50%);
    filter: drop-shadow(0 8px 14px rgba(22, 26, 29, 0.25));
}

.editor-panel {
    display: grid;
    gap: 18px;
    padding: 18px;
}

.editor-panel[hidden],
.empty-state[hidden] {
    display: none;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.media-pane,
.timeline-panel,
.render-panel {
    min-width: 0;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fbfcfc;
    padding: 16px;
}

.pane-heading,
.render-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

#videoPreview,
.cropper-wrapper {
    width: 100%;
    aspect-ratio: 16 / 9;
    margin-top: 14px;
    border-radius: 8px;
    background: #0f1416;
}

#videoPreview {
    display: block;
    object-fit: contain;
}

.cropper-wrapper {
    overflow: hidden;
    transition: opacity 0.18s ease, filter 0.18s ease;
}

.cropper-wrapper.crop-disabled {
    opacity: 0.62;
    filter: saturate(0.65);
}

#videoCanvas {
    display: block;
    max-width: 100%;
}

.range-slider {
    position: relative;
    height: 30px;
    margin: 18px 10px 8px;
    touch-action: none;
}

.slider-track,
.slider-selected {
    position: absolute;
    top: 11px;
    bottom: 11px;
    border-radius: 8px;
}

.slider-track {
    left: 0;
    right: 0;
    background: #d1dcdf;
}

.slider-selected {
    left: 0;
    width: 100%;
    background: var(--coral);
}

.thumb {
    position: absolute;
    top: 3px;
    width: 24px;
    height: 24px;
    margin-left: -12px;
    border: 3px solid #ffffff;
    border-radius: 8px;
    background: var(--ink);
    box-shadow: 0 5px 12px rgba(22, 26, 29, 0.22);
    cursor: ew-resize;
}

.thumb.start {
    left: 0;
}

.thumb.end {
    left: 100%;
}

.range-value,
.clip-meta {
    color: var(--muted);
    font-weight: 750;
}

.crop-controls,
.export-options {
    display: flex;
    align-items: end;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 14px;
}

.toggle-option {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 9px 12px;
    color: var(--ink);
    background: var(--surface);
    font-weight: 800;
    cursor: pointer;
}

.toggle-option input {
    width: 18px;
    height: 18px;
    accent-color: var(--teal);
}

.select-field {
    min-width: min(250px, 100%);
    display: grid;
    gap: 6px;
    color: var(--muted);
    font-size: 0.86rem;
    font-weight: 800;
}

.select-field select {
    min-height: 44px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 9px 12px;
    color: var(--ink);
    background: var(--surface);
    font-weight: 750;
}

.storyboard {
    min-height: 116px;
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 132px;
    gap: 10px;
    margin-top: 14px;
    overflow-x: auto;
    padding-bottom: 6px;
}

.thumbnail-tile {
    display: grid;
    gap: 6px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 6px;
    background: var(--surface);
    color: var(--ink);
    text-align: left;
    cursor: pointer;
}

.thumbnail-tile:hover {
    border-color: var(--teal);
}

.thumbnail-tile img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: 6px;
    background: #0f1416;
}

.thumbnail-tile span,
.timeline-empty {
    color: var(--muted);
    font-size: 0.84rem;
    font-weight: 800;
}

.render-panel {
    background: #fffaf0;
    flex-wrap: wrap;
}

.footer {
    margin-top: auto;
    padding: 22px clamp(18px, 4vw, 56px);
    color: var(--muted);
    background: var(--surface);
    border-top: 1px solid var(--line);
    font-weight: 700;
}

.tool-panel {
    display: grid;
    gap: 18px;
    padding: 18px;
}

.tool-form {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    align-items: end;
}

.tool-form .wide {
    grid-column: span 2;
}

.image-crop-grid {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.image-preview,
.ai-result img {
    max-width: min(520px, 100%);
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #0f1416;
}

.image-preview {
    grid-column: 1 / -1;
    max-height: 340px;
    object-fit: contain;
}

.ai-result {
    display: grid;
    gap: 12px;
    justify-items: start;
}

.job-output {
    max-width: 100%;
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 14px;
    background: #111719;
    color: #e8f3f1;
}

.loader {
    width: 18px;
    height: 18px;
    display: none;
    border: 3px solid rgba(255, 255, 255, 0.55);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.secondary-action .loader {
    border-color: rgba(22, 26, 29, 0.25);
    border-top-color: var(--ink);
}

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

@media (max-width: 1080px) {
    .topbar,
    .empty-state,
    .preview-grid,
    .import-panel,
    .tool-form,
    .image-crop-grid {
        grid-template-columns: 1fr;
    }

    .tool-form .wide {
        grid-column: auto;
    }

    .topbar {
        display: grid;
        align-items: start;
    }

    .tool-nav {
        justify-content: flex-start;
        max-width: none;
    }
}

@media (max-width: 680px) {
    .workspace {
        padding-inline: 12px;
    }

    .topbar {
        padding-inline: 14px;
    }

    .control-row,
    .pane-heading,
    .render-panel {
        grid-template-columns: 1fr;
        display: grid;
        align-items: stretch;
    }

    .primary-action,
    .secondary-action,
    .render-action {
        width: 100%;
    }

    .crop-controls,
    .export-options {
        display: grid;
        grid-template-columns: 1fr;
    }

    .toggle-option,
    .select-field {
        width: 100%;
    }

    .tool-nav a {
        flex: 1 1 140px;
        justify-content: center;
    }

    .empty-visual {
        min-height: 210px;
    }
}