:root {
    --bg: #eef4fb;
    --bg-soft: #f7f9fc;
    --surface: #ffffff;
    --surface-muted: #f8fbff;
    --surface-strong: #0d1b30;
    --text: #132238;
    --text-soft: #5e7088;
    --line: #d8e3f0;
    --line-strong: #c8d7e8;
    --primary: #1789d9;
    --primary-soft: #e6f4ff;
    --primary-strong: #0d6eb2;
    --danger: #c43b4d;
    --danger-soft: #fff2f4;
    --success: #17785f;
    --success-soft: #eaf8f2;
    --warning: #b16911;
    --warning-soft: #fff5e8;
    --shadow: 0 18px 48px rgba(10, 22, 40, 0.10);
    --shadow-soft: 0 10px 24px rgba(10, 22, 40, 0.07);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --radius-sm: 12px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    min-height: 100vh;
    background:
        radial-gradient(circle at top right, rgba(23, 137, 217, 0.12), transparent 30%),
        linear-gradient(180deg, #f4f8fc 0%, #eef4fb 100%);
}

img {
    display: block;
    max-width: 100%;
}

button,
input,
select,
textarea {
    font: inherit;
}

button {
    border: none;
}

.page-shell {
    width: min(1220px, calc(100% - 28px));
    margin: 0 auto;
    padding: 22px 0 40px;
}

.skip-link {
    position: absolute;
    left: 16px;
    top: -56px;
    background: #ffffff;
    color: #09192a;
    padding: 10px 14px;
    border-radius: 12px;
    z-index: 999;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 16px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.page-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.page-brand-mark {
    width: 52px;
    height: 52px;
    border-radius: 18px;
    background: linear-gradient(135deg, #0f7fd2, #70d0ff);
    color: #ffffff;
    display: grid;
    place-items: center;
    font-size: 1.35rem;
    box-shadow: 0 14px 28px rgba(15, 127, 210, 0.22);
}

.page-brand-copy h1 {
    margin: 0;
    font-size: clamp(1.42rem, 2vw, 2rem);
    color: #10213a;
}

.page-brand-copy p {
    margin: 6px 0 0;
    color: var(--text-soft);
    line-height: 1.65;
}

.page-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.badge,
.chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 13px;
    border-radius: 999px;
    font-size: 0.84rem;
    font-weight: 700;
    background: #ffffff;
    border: 1px solid var(--line);
    color: #113554;
    box-shadow: var(--shadow-soft);
}

.badge.is-local {
    background: var(--success-soft);
    color: var(--success);
    border-color: rgba(23, 120, 95, 0.16);
}

.badge.is-server {
    background: var(--warning-soft);
    color: var(--warning);
    border-color: rgba(177, 105, 17, 0.18);
}

.btn,
button.btn,
a.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 18px;
    border-radius: 14px;
    border: 1px solid transparent;
    text-decoration: none;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.btn:hover:not(:disabled),
a.btn:hover {
    transform: translateY(-2px);
}

.btn:disabled,
button:disabled {
    cursor: not-allowed;
    opacity: 0.62;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #56c3ff);
    color: #ffffff;
    box-shadow: 0 14px 28px rgba(23, 137, 217, 0.22);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: 0 18px 34px rgba(23, 137, 217, 0.28);
}

.btn-secondary {
    background: #ffffff;
    border-color: var(--line);
    color: #133453;
    box-shadow: var(--shadow-soft);
}

.btn-danger {
    background: var(--danger-soft);
    border-color: rgba(196, 59, 77, 0.18);
    color: var(--danger);
}

.btn-ghost {
    background: transparent;
    border-color: var(--line);
    color: #123555;
}

.tool-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.82fr);
    gap: 20px;
}

.panel,
.info-panel,
.summary-panel {
    background: var(--surface);
    border: 1px solid rgba(12, 28, 51, 0.08);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

.panel {
    padding: 28px;
}

.info-panel,
.summary-panel {
    padding: 24px;
}

.panel h2,
.info-panel h3,
.summary-panel h3 {
    margin: 0;
    color: #10213a;
}

.panel-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 20px;
}

.panel-head p,
.info-panel p,
.summary-panel p,
.field-note,
.footer-note,
.step-list li,
.helper-list li,
.file-meta,
.caption {
    color: var(--text-soft);
    line-height: 1.72;
}

.panel-head p {
    margin: 8px 0 0;
}

.section-stack {
    display: grid;
    gap: 18px;
}

.notice {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    background: var(--surface-muted);
}

.notice strong {
    display: block;
    margin-bottom: 4px;
    color: #0f1f35;
}

.notice-icon {
    width: 34px;
    height: 34px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: rgba(23, 137, 217, 0.12);
    color: var(--primary);
    flex: 0 0 auto;
}

.notice.is-warning {
    background: var(--warning-soft);
    border-color: rgba(177, 105, 17, 0.18);
}

.notice.is-warning .notice-icon {
    background: rgba(177, 105, 17, 0.14);
    color: var(--warning);
}

.notice.is-success {
    background: var(--success-soft);
    border-color: rgba(23, 120, 95, 0.18);
}

.notice.is-success .notice-icon {
    background: rgba(23, 120, 95, 0.12);
    color: var(--success);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.field,
.field-group {
    display: grid;
    gap: 8px;
}

.field.is-full {
    grid-column: 1 / -1;
}

label,
.field-label {
    font-weight: 700;
    color: #173050;
    font-size: 0.95rem;
}

input[type='text'],
input[type='url'],
select,
textarea {
    width: 100%;
    border-radius: 14px;
    border: 1px solid var(--line-strong);
    background: #ffffff;
    color: var(--text);
    padding: 13px 14px;
    outline: none;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

input[type='text']:focus,
input[type='url']:focus,
select:focus,
textarea:focus {
    border-color: rgba(23, 137, 217, 0.46);
    box-shadow: 0 0 0 4px rgba(23, 137, 217, 0.12);
}

input[type='color'] {
    width: 100%;
    min-height: 52px;
    border-radius: 14px;
    border: 1px solid var(--line-strong);
    background: #ffffff;
    padding: 8px;
}

input[type='checkbox'] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

input[type='range'] {
    width: 100%;
    accent-color: var(--primary);
}

.checkbox-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px;
    border-radius: 16px;
    border: 1px solid var(--line);
    background: var(--surface-muted);
}

.checkbox-row label {
    font-size: 0.92rem;
    line-height: 1.6;
    font-weight: 600;
}

.dropzone {
    position: relative;
    display: block;
    padding: 22px;
    border-radius: var(--radius-lg);
    border: 2px dashed #b8cce2;
    background: linear-gradient(180deg, #fafcff 0%, #f4f9ff 100%);
    transition: border-color 0.18s ease, transform 0.18s ease, background-color 0.18s ease;
    cursor: pointer;
}

.dropzone:hover,
.dropzone:focus-within,
.dropzone.is-dragover {
    border-color: var(--primary);
    background: #eef7ff;
    transform: translateY(-1px);
}

.dropzone input[type='file'] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.dropzone-grid {
    display: flex;
    gap: 16px;
    align-items: center;
}

.dropzone-icon {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    background: rgba(23, 137, 217, 0.12);
    color: var(--primary);
    font-size: 1.55rem;
    flex: 0 0 auto;
}

.dropzone-title {
    display: block;
    font-size: 1rem;
    font-weight: 800;
    color: #0d2038;
}

.dropzone-subtitle {
    display: block;
    margin-top: 4px;
    color: var(--text-soft);
    line-height: 1.65;
}

.dropzone-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.status-box {
    min-height: 56px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    background: var(--surface-muted);
    color: #314762;
    display: flex;
    align-items: center;
    line-height: 1.6;
}

.status-box[data-tone='danger'] {
    background: var(--danger-soft);
    border-color: rgba(196, 59, 77, 0.18);
    color: var(--danger);
}

.status-box[data-tone='success'] {
    background: var(--success-soft);
    border-color: rgba(23, 120, 95, 0.18);
    color: var(--success);
}

.status-box[data-tone='warning'] {
    background: var(--warning-soft);
    border-color: rgba(177, 105, 17, 0.18);
    color: var(--warning);
}

.counter-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 14px;
}

.thumb-card,
.file-row {
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #ffffff;
    box-shadow: var(--shadow-soft);
}

.thumb-card {
    overflow: hidden;
}

.thumb-image {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    background: #eff4fa;
}

.thumb-body {
    padding: 14px;
    display: grid;
    gap: 10px;
}

.thumb-title {
    margin: 0;
    font-size: 0.95rem;
    color: #10213a;
    word-break: break-word;
}

.thumb-meta,
.file-meta {
    font-size: 0.84rem;
}

.inline-actions,
.file-row-actions,
.segmented {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.mini-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    min-height: 36px;
    padding: 0 10px;
    border-radius: 12px;
    background: #ffffff;
    border: 1px solid var(--line);
    color: #123555;
    cursor: pointer;
    font-weight: 700;
    transition: transform 0.18s ease, border-color 0.18s ease;
}

.mini-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    border-color: rgba(23, 137, 217, 0.32);
}

.file-list {
    display: grid;
    gap: 12px;
}

.file-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
}

.file-row-main {
    display: grid;
    gap: 4px;
    min-width: 0;
}

.file-row-title {
    font-weight: 800;
    color: #10213a;
    word-break: break-word;
}

.empty-state {
    display: grid;
    place-items: center;
    min-height: 120px;
    padding: 22px;
    border-radius: 18px;
    border: 1px dashed var(--line-strong);
    background: #fbfdff;
    text-align: center;
}

.empty-state strong {
    display: block;
    margin-bottom: 6px;
    color: #10213a;
}

.option-card {
    padding: 16px;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: var(--surface-muted);
}

.option-card h3 {
    margin: 0 0 8px;
    color: #10213a;
}

.option-card p {
    margin: 0;
}

code {
    padding: 2px 6px;
    border-radius: 8px;
    background: #eef4fb;
    color: #0d4168;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.92em;
}

.segmented {
    gap: 10px;
}

.segment-btn {
    min-height: 44px;
    padding: 0 16px;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: #ffffff;
    color: #133453;
    font-weight: 700;
    cursor: pointer;
}

.segment-btn.is-active {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 12px 24px rgba(23, 137, 217, 0.18);
}

.input-panel {
    display: none;
}

.input-panel.is-active {
    display: grid;
    gap: 16px;
}

.helper-list,
.step-list {
    display: grid;
    gap: 12px;
    margin: 0;
    padding-left: 18px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.stat-card {
    padding: 14px;
    border-radius: 18px;
    background: var(--surface-muted);
    border: 1px solid var(--line);
}

.stat-card strong {
    display: block;
    color: #0d2038;
    font-size: 1.2rem;
}

.stat-card span {
    color: var(--text-soft);
    font-size: 0.9rem;
}

.action-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.action-row > * {
    flex: 1 1 180px;
}

.footer-line {
    padding-top: 18px;
    margin-top: 24px;
    border-top: 1px solid rgba(12, 28, 51, 0.08);
    color: #8191a6;
    font-size: 0.92rem;
}

@media (max-width: 1024px) {
    .tool-layout {
        grid-template-columns: 1fr;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 720px) {
    .page-shell {
        width: min(100% - 18px, 1220px);
        padding-top: 18px;
    }

    .panel,
    .info-panel,
    .summary-panel {
        padding: 20px;
        border-radius: 22px;
    }

    .form-grid,
    .stat-grid {
        grid-template-columns: 1fr;
    }

    .dropzone {
        padding: 18px;
    }

    .dropzone-grid,
    .file-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .file-row-actions,
    .inline-actions,
    .action-row {
        width: 100%;
    }

    .action-row > * {
        flex: 1 1 100%;
    }
}