.gif-app {
    --gif-primary: #06b6d4;
    --gif-primary-strong: #0891b2;
    --gif-primary-soft: rgba(6, 182, 212, 0.12);
    --gif-primary-fade: rgba(6, 182, 212, 0.06);
    --gif-surface: var(--bg-section, #ffffff);
    --gif-surface-alt: #f8fbfd;
    --gif-surface-deep: #edf5fb;
    --gif-border: rgba(44, 62, 80, 0.12);
    --gif-shadow: 0 18px 40px rgba(44, 62, 80, 0.08);
    --gif-shadow-soft: 0 10px 22px rgba(44, 62, 80, 0.06);
    --gif-text: var(--text-primary, #2c3e50);
    --gif-muted: var(--text-secondary, #627384);
    width: 100%;
    max-width: 74rem;
    display: grid;
    gap: var(--spacing-md);
    color: var(--gif-text);
}

body.dark-mode .gif-app {
    --gif-primary: #22d3ee;
    --gif-primary-strong: #06b6d4;
    --gif-primary-soft: rgba(34, 211, 238, 0.14);
    --gif-primary-fade: rgba(34, 211, 238, 0.08);
    --gif-surface: var(--bg-section, #2d2d2d);
    --gif-surface-alt: #31363b;
    --gif-surface-deep: #252a31;
    --gif-border: rgba(255, 255, 255, 0.09);
    --gif-shadow: 0 18px 36px rgba(0, 0, 0, 0.25);
    --gif-shadow-soft: 0 10px 22px rgba(0, 0, 0, 0.16);
    --gif-text: var(--text-primary, #ffffff);
    --gif-muted: var(--text-secondary, #c7d2da);
}

.gif-card {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--gif-border);
    border-radius: 1.5rem;
    background: var(--gif-surface);
    box-shadow: var(--gif-shadow);
}

.gif-controls h2,
.gif-stage h2 {
    margin: 0;
    text-align: left;
    color: var(--gif-text);
    font-size: clamp(1.35rem, 2.7vw, 2.2rem);
    letter-spacing: -0.02em;
}

.gif-section-head p,
.gif-preview-header p,
.gif-timeline-head p {
    margin: 0;
    color: var(--gif-muted);
    line-height: 1.55;
}

.gif-layout {
    display: grid;
    grid-template-columns: minmax(20rem, 24rem) minmax(0, 1fr);
    gap: var(--spacing-md);
    align-items: stretch;
}

.gif-controls,
.gif-stage {
    padding: 1.35rem;
    height: 100%;
}

.gif-controls {
    display: grid;
    gap: 1.15rem;
    align-content: start;
    background:
        linear-gradient(180deg, var(--gif-primary-fade), rgba(255, 255, 255, 0) 18%),
        var(--gif-surface);
}

.gif-section-head {
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--gif-border);
}

.gif-section-head p {
    margin-top: 0.45rem;
    font-size: 0.94rem;
}

.gif-upload-block,
.gif-export-panel {
    display: grid;
    gap: 0.75rem;
}

.gif-label {
    color: var(--gif-muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.gif-dropzone {
    display: grid;
    place-items: center;
    gap: 0.45rem;
    min-height: 12rem;
    padding: 1.25rem;
    border-radius: 1.25rem;
    border: 1.5px dashed rgba(6, 182, 212, 0.34);
    background:
        linear-gradient(180deg, rgba(6, 182, 212, 0.06), rgba(6, 182, 212, 0.015)),
        var(--gif-surface-alt);
    text-align: center;
    cursor: pointer;
    transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.gif-dropzone:hover,
.gif-dropzone:focus-visible,
.gif-dropzone.is-dragover {
    transform: translateY(-2px);
    border-color: var(--gif-primary);
    box-shadow: 0 0 0 4px var(--gif-primary-soft);
    outline: none;
}

.gif-dropzone-icon {
    width: 4rem;
    height: 4rem;
    display: grid;
    place-items: center;
    border-radius: 1.2rem;
    background: linear-gradient(135deg, var(--gif-primary), var(--gif-primary-strong));
    color: #ffffff;
    font-size: 1.45rem;
    box-shadow: 0 16px 28px rgba(6, 182, 212, 0.28);
}

.gif-dropzone p {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--gif-text);
}

.gif-dropzone span {
    color: var(--gif-muted);
    font-size: 0.92rem;
}

.gif-inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.gif-inline-actions .gif-button {
    flex: 1 1 0;
}

.gif-inline-actions-wide {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.gif-button {
    min-height: 2.95rem;
    border: 1px solid transparent;
    border-radius: 0.95rem;
    padding: 0.8rem 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
}

.gif-button:hover:enabled {
    transform: translateY(-1px);
}

.gif-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.gif-button-primary {
    background: linear-gradient(135deg, var(--gif-primary), var(--gif-primary-strong));
    color: #ffffff;
    box-shadow: 0 16px 26px rgba(6, 182, 212, 0.22);
}

.gif-button-secondary {
    background: linear-gradient(180deg, #f4fbfe, #e8f6fb);
    color: var(--gif-primary-strong);
    border-color: #c7ecf4;
}

body.dark-mode .gif-button-secondary {
    background: linear-gradient(180deg, rgba(34, 211, 238, 0.12), rgba(34, 211, 238, 0.08));
    border-color: rgba(34, 211, 238, 0.2);
    color: #baf4ff;
}

.gif-button-ghost {
    background: rgba(255, 255, 255, 0.78);
    color: var(--gif-text);
    border-color: var(--gif-border);
}

body.dark-mode .gif-button-ghost {
    background: linear-gradient(180deg, #3a4046, #33383e);
}

.gif-settings-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.gif-field {
    display: grid;
    gap: 0.38rem;
}

.gif-bg-controls {
    display: grid;
    grid-template-columns: 4.2rem minmax(0, 1fr);
    gap: 0.6rem;
}

.gif-field small {
    color: var(--gif-muted);
    font-size: 0.77rem;
}

.gif-input {
    width: 100%;
    min-height: 3rem;
    padding: 0.82rem 0.95rem;
    border-radius: 0.95rem;
    border: 1px solid var(--gif-border);
    background: linear-gradient(180deg, var(--gif-surface-alt), #fdfefe);
    color: var(--gif-text);
    font: inherit;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

select.gif-input {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding-right: 0.95rem;
}

body.dark-mode .gif-input {
    background: linear-gradient(180deg, #343a40, #2b3036);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

body.dark-mode select.gif-input {
    background-image: none;
}

.gif-input:hover {
    border-color: rgba(6, 182, 212, 0.28);
}

.gif-input:focus {
    outline: none;
    transform: translateY(-1px);
    border-color: var(--gif-primary);
    box-shadow: 0 0 0 4px var(--gif-primary-soft);
}

.gif-color-input {
    padding: 0.3rem;
    cursor: pointer;
}

.gif-bg-toggle {
    min-height: 3rem;
    min-width: 3rem;
    padding: 0.8rem;
    flex: 0 0 3rem;
    gap: 0;
}

.gif-bg-toggle.is-active {
    background: linear-gradient(135deg, var(--gif-primary), var(--gif-primary-strong));
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 12px 24px rgba(6, 182, 212, 0.22);
}

body.dark-mode .gif-bg-toggle.is-active {
    color: #ffffff;
}

.gif-stage {
    display: grid;
    gap: 1rem;
}

.gif-timeline-card {
    grid-column: 1 / -1;
    padding: 1.1rem 1.35rem 1.2rem;
}

.gif-preview-shell,
.gif-timeline {
    display: grid;
    gap: 0.95rem;
}

.gif-preview-shell {
    grid-template-rows: auto 1fr;
    height: 100%;
}

.gif-preview-header,
.gif-timeline-head {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
}

.gif-preview-header p,
.gif-timeline-head p {
    margin-top: 0.3rem;
    font-size: 0.86rem;
}

.gif-stat-pills {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.55rem;
}

.gif-pill {
    display: inline-flex;
    align-items: center;
    min-height: 2rem;
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    background: var(--gif-surface-deep);
    color: var(--gif-text);
    font-size: 0.84rem;
    font-weight: 600;
    border: 1px solid var(--gif-border);
}

.gif-preview-board {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 0;
    height: 100%;
    padding: 0;
    overflow: hidden;
    border-radius: 1.4rem;
    background:
        radial-gradient(circle at top, rgba(6, 182, 212, 0.08), transparent 45%),
        linear-gradient(180deg, #f7fbfe, #eef4f8);
    border: 1px solid var(--gif-border);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.gif-preview-board.has-frames {
    background: var(--gif-preview-bg, #ffffff);
    border: 1px solid rgba(44, 62, 80, 0.12);
    box-shadow: 0 12px 32px rgba(44, 62, 80, 0.12);
}

.gif-preview-board.has-frames.is-transparent {
    background:
        linear-gradient(45deg, rgba(44, 62, 80, 0.055) 25%, transparent 25%, transparent 75%, rgba(44, 62, 80, 0.055) 75%, rgba(44, 62, 80, 0.055)),
        linear-gradient(45deg, rgba(44, 62, 80, 0.055) 25%, transparent 25%, transparent 75%, rgba(44, 62, 80, 0.055) 75%, rgba(44, 62, 80, 0.055));
    background-position: 0 0, 12px 12px;
    background-size: 24px 24px;
    background-color: #f4f7fb;
}

.gif-preview-board.is-transparent {
    background:
        linear-gradient(45deg, rgba(44, 62, 80, 0.055) 25%, transparent 25%, transparent 75%, rgba(44, 62, 80, 0.055) 75%, rgba(44, 62, 80, 0.055)),
        linear-gradient(45deg, rgba(44, 62, 80, 0.055) 25%, transparent 25%, transparent 75%, rgba(44, 62, 80, 0.055) 75%, rgba(44, 62, 80, 0.055));
    background-position: 0 0, 12px 12px;
    background-size: 24px 24px;
    background-color: #f4f7fb;
}

body.dark-mode .gif-preview-board {
    background:
        radial-gradient(circle at top, rgba(34, 211, 238, 0.1), transparent 45%),
        linear-gradient(180deg, #2f353c, #262b31);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

body.dark-mode .gif-preview-board.has-frames {
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

body.dark-mode .gif-preview-board.is-transparent {
    background: transparent;
}

body.dark-mode .gif-preview-board.has-frames.is-transparent {
    background:
        linear-gradient(45deg, rgba(255, 255, 255, 0.05) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.05) 75%, rgba(255, 255, 255, 0.05)),
        linear-gradient(45deg, rgba(255, 255, 255, 0.05) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.05) 75%, rgba(255, 255, 255, 0.05));
    background-position: 0 0, 12px 12px;
    background-size: 24px 24px;
    background-color: #262b31;
}

#previewCanvas {
    display: block;
    width: auto;
    max-width: 100%;
    max-height: 100%;
    border-radius: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
    object-fit: contain;
}

#previewCanvas.is-empty {
    visibility: hidden;
    pointer-events: none;
    width: 100%;
    height: 100%;
    border-color: transparent;
    background: transparent;
    box-shadow: none;
}

#previewCanvas.is-transparent-bg {
    background:
        linear-gradient(45deg, rgba(44, 62, 80, 0.055) 25%, transparent 25%, transparent 75%, rgba(44, 62, 80, 0.055) 75%, rgba(44, 62, 80, 0.055)),
        linear-gradient(45deg, rgba(44, 62, 80, 0.055) 25%, transparent 25%, transparent 75%, rgba(44, 62, 80, 0.055) 75%, rgba(44, 62, 80, 0.055));
    background-position: 0 0, 12px 12px;
    background-size: 24px 24px;
    background-color: #f4f7fb;
}

body.dark-mode #previewCanvas {
    border: 0;
    box-shadow: none;
}

body.dark-mode #previewCanvas.is-empty {
    border-color: transparent;
    box-shadow: none;
}

body.dark-mode #previewCanvas.is-transparent-bg {
    background:
        linear-gradient(45deg, rgba(255, 255, 255, 0.05) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.05) 75%, rgba(255, 255, 255, 0.05)),
        linear-gradient(45deg, rgba(255, 255, 255, 0.05) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.05) 75%, rgba(255, 255, 255, 0.05));
    background-position: 0 0, 12px 12px;
    background-size: 24px 24px;
    background-color: #262b31;
}

.gif-preview-empty {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    align-content: center;
    gap: 0.7rem;
    border-radius: inherit;
    color: var(--gif-muted);
    text-align: center;
    padding: 1.5rem;
    background: transparent;
}

.gif-preview-empty i {
    font-size: 2.2rem;
    color: var(--gif-primary);
}

.gif-preview-empty.is-hidden {
    display: none;
}

.gif-sequence-empty {
    display: grid;
    place-items: center;
    gap: 0.7rem;
    min-height: 8.5rem;
    padding: 1.2rem;
    border-radius: 1rem;
    border: 1px dashed rgba(44, 62, 80, 0.15);
    background: linear-gradient(180deg, rgba(44, 62, 80, 0.03), rgba(44, 62, 80, 0.015));
    color: var(--gif-muted);
    text-align: center;
}

body.dark-mode .gif-sequence-empty {
    border-color: rgba(255, 255, 255, 0.1);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.015));
}

.gif-sequence-empty i {
    font-size: 1.5rem;
    color: var(--gif-primary);
}

.gif-sequence-empty p {
    margin: 0;
    max-width: 30rem;
    font-size: 0.92rem;
    line-height: 1.5;
}

.gif-sequence-empty.is-hidden {
    display: none;
}

.gif-frames-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(11.75rem, 13rem);
    align-items: start;
    gap: 0.65rem;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 0 0 1rem;
    scroll-snap-type: x proximity;
}

.gif-frames-list::-webkit-scrollbar {
    height: 0.75rem;
}

.gif-frames-list::-webkit-scrollbar-track {
    background: transparent;
}

.gif-frames-list::-webkit-scrollbar-thumb {
    background: rgba(44, 62, 80, 0.18);
    border-radius: 999px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

body.dark-mode .gif-frames-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.18);
    border: 2px solid transparent;
    background-clip: padding-box;
}

.gif-frame-card {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.5rem;
    align-self: start;
    align-content: start;
    padding: 0.62rem;
    border-radius: 1rem;
    border: 1px solid var(--gif-border);
    background: linear-gradient(180deg, rgba(6, 182, 212, 0.035), rgba(255, 255, 255, 0)), var(--gif-surface);
    scroll-snap-align: start;
}

body.dark-mode .gif-frame-card {
    background: linear-gradient(180deg, rgba(34, 211, 238, 0.04), rgba(255, 255, 255, 0)), var(--gif-surface);
}

.gif-frame-card.is-active {
    border-color: rgba(6, 182, 212, 0.42);
    box-shadow: 0 0 0 4px var(--gif-primary-soft);
}

.gif-frame-thumb {
    width: 100%;
    aspect-ratio: 16 / 9.65;
    border-radius: 0.8rem;
    object-fit: contain;
    background: var(--gif-surface-deep);
    border: 1px solid var(--gif-border);
}

.gif-frame-main {
    display: grid;
    gap: 0.32rem;
}

.gif-frame-main h3 {
    margin: 0;
    font-size: 0.8rem;
    color: var(--gif-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.gif-frame-meta {
    color: var(--gif-muted);
    font-size: 0.73rem;
}

.gif-frame-settings {
    display: grid;
    gap: 0.45rem;
}

.gif-delay-field {
    display: grid;
    gap: 0.22rem;
}

.gif-delay-field label {
    font-size: 0.66rem;
    color: var(--gif-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.gif-delay-field input {
    width: 100%;
    min-height: 2.25rem;
    padding: 0.55rem 0.7rem;
}

.gif-frame-actions {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.38rem;
}

.gif-icon-button {
    width: 100%;
    height: 2.15rem;
    display: inline-grid;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--gif-border);
    border-radius: 0.8rem;
    background: var(--gif-surface-alt);
    color: var(--gif-text);
    cursor: pointer;
    transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

body.dark-mode .gif-icon-button {
    background: #343a40;
}

.gif-icon-button:hover {
    transform: translateY(-1px);
    border-color: rgba(6, 182, 212, 0.3);
}

.gif-status {
    margin: 0;
    color: var(--gif-muted);
    font-size: 0.88rem;
    line-height: 1.5;
}

@media (max-width: 70rem) {
    .gif-layout {
        grid-template-columns: 1fr;
    }

    .gif-timeline-card {
        padding: 1rem;
    }
}

@media (max-width: 54rem) {
    .gif-inline-actions-wide,
    .gif-settings-grid {
        grid-template-columns: 1fr;
    }

    .gif-preview-header,
    .gif-timeline-head {
        flex-direction: column;
    }

    .gif-stat-pills {
        justify-content: flex-start;
    }
}

@media (max-width: 42rem) {
    .gif-app {
        gap: 0.85rem;
    }

    .gif-hero,
    .gif-controls,
    .gif-stage {
        padding: 1rem;
    }

    .gif-frames-list {
        grid-auto-columns: minmax(10.75rem, 11.75rem);
    }

    .gif-preview-board {
        min-height: 18rem;
        height: auto;
        padding: 0;
    }
}