/* Excel OA Tool - Shared Design System */

/* === CSS Custom Properties === */
:root {
    --color-bg: #f8f9fb;
    --color-surface: #ffffff;
    --color-surface-hover: #f1f3f5;
    --color-border: #e2e5e9;
    --color-border-light: #eef0f2;
    --color-text: #1a1d21;
    --color-text-secondary: #5f6872;
    --color-text-tertiary: #8b939d;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-accent-light: #eff6ff;
    --color-accent-border: #bfdbfe;
    --color-success: #059669;
    --color-success-light: #ecfdf5;
    --color-success-border: #a7f3d0;
    --color-warning: #d97706;
    --color-warning-light: #fffbeb;
    --color-warning-border: #fde68a;
    --color-danger: #dc2626;
    --color-danger-light: #fef2f2;
    --color-danger-border: #fecaca;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.08);
    --font-sans: "Inter", "Microsoft YaHei", "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
}

/* === Reset & Base === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* === Layout === */
.app-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

.app-header {
    text-align: center;
    margin-bottom: 28px;
}

.app-header h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

/* === Navigation === */
.app-nav {
    display: flex;
    justify-content: center;
    gap: 6px;
    flex-wrap: wrap;
}

.app-nav a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: all 0.15s ease;
    text-decoration: none;
}

.app-nav a:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border);
    color: var(--color-text);
    text-decoration: none;
}

.app-nav a.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.app-nav a.active:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: #fff;
}

/* === Card / Panel === */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
}

.card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-title .step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-accent-light);
    color: var(--color-accent);
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

/* === Form Elements === */
.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 5px;
}

.form-group label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.form-hint {
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-top: 3px;
    line-height: 1.5;
}

input[type="text"],
input[type="password"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-surface);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    outline: none;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
}

input::placeholder, textarea::placeholder {
    color: var(--color-text-tertiary);
}

input[readonly] {
    background: var(--color-bg);
    color: var(--color-text-secondary);
    cursor: default;
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%235f6872' d='M2.5 4.5L6 8l3.5-3.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

input[type="file"] {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    cursor: pointer;
}

input[type="file"]:hover {
    border-color: var(--color-accent);
}

/* Form row layout */
.form-row {
    display: flex;
    gap: 14px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.form-row .form-group {
    flex: 1;
    min-width: 160px;
    margin-bottom: 0;
}

.form-row .form-group.flex-fixed {
    flex: 0 0 auto;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 20px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all 0.15s ease;
    line-height: 1.4;
    white-space: nowrap;
}

.btn:active {
    transform: translateY(0.5px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
}

.btn-success {
    background: var(--color-success);
    color: #fff;
    border-color: var(--color-success);
}

.btn-success:hover:not(:disabled) {
    background: #047857;
    border-color: #047857;
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
    border-color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
    background: #b91c1c;
    border-color: #b91c1c;
}

.btn-outline {
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border-color: var(--color-border);
}

.btn-outline:hover:not(:disabled) {
    background: var(--color-surface-hover);
    color: var(--color-text);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
    padding: 6px 12px;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-surface-hover);
    color: var(--color-text);
}

.btn-sm {
    padding: 5px 12px;
    font-size: 12px;
}

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.btn-group-right {
    justify-content: flex-end;
}

.btn-group-center {
    justify-content: center;
}

/* === Status Messages === */
.status-msg {
    margin-top: 14px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 13px;
    line-height: 1.6;
    display: none;
}

.status-msg.visible {
    display: block;
}

.status-msg.success {
    background: var(--color-success-light);
    color: #065f46;
    border: 1px solid var(--color-success-border);
}

.status-msg.error {
    background: var(--color-danger-light);
    color: #991b1b;
    border: 1px solid var(--color-danger-border);
}

.status-msg.info {
    background: var(--color-accent-light);
    color: #1e40af;
    border: 1px solid var(--color-accent-border);
}

.status-msg.warning {
    background: var(--color-warning-light);
    color: #92400e;
    border: 1px solid var(--color-warning-border);
}

.status-msg a {
    font-weight: 500;
}

/* === Progress Bar === */
.progress-wrap {
    margin-top: 12px;
    display: none;
}

.progress-wrap.visible {
    display: block;
}

.progress-bar {
    height: 6px;
    background: var(--color-border-light);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--color-accent);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-fill.animated {
    background-image: linear-gradient(
        45deg,
        rgba(255,255,255,0.2) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255,255,255,0.2) 50%,
        rgba(255,255,255,0.2) 75%,
        transparent 75%,
        transparent
    );
    background-size: 20px 20px;
    animation: progress-stripes 0.8s linear infinite;
}

@keyframes progress-stripes {
    from { background-position: 20px 0; }
    to { background-position: 0 0; }
}

.progress-text {
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-top: 6px;
    font-family: var(--font-mono);
}

/* === Data Table === */
.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-top: 12px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table thead {
    position: sticky;
    top: 0;
    z-index: 1;
}

.data-table th {
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
    font-size: 12px;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.data-table td {
    padding: 8px 14px;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text);
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background: var(--color-surface-hover);
}

.data-table tbody tr.selected {
    background: var(--color-accent-light);
}

.data-table .cell-mono {
    font-family: var(--font-mono);
    font-size: 12px;
}

.data-table .cell-center {
    text-align: center;
}

/* === Pagination === */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 14px;
    font-size: 13px;
    color: var(--color-text-secondary);
}

.pagination .page-info {
    font-family: var(--font-mono);
    font-size: 12px;
}

/* === Checkbox === */
input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-accent);
    cursor: pointer;
}

/* === Warning Box === */
.warning-box {
    background: var(--color-warning-light);
    border: 1px solid var(--color-warning-border);
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    color: #92400e;
    font-size: 13px;
    line-height: 1.6;
}

/* === Inline Tag / Badge === */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
    line-height: 1.6;
    letter-spacing: 0.02em;
}

.tag-accent {
    background: var(--color-accent-light);
    color: var(--color-accent);
}

.tag-success {
    background: var(--color-success-light);
    color: var(--color-success);
}

.tag-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.tag-danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

/* === Log / Output Box === */
.log-box {
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    padding: 14px;
    border-radius: var(--radius-md);
    white-space: pre-wrap;
    max-height: 240px;
    overflow: auto;
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-top: 12px;
}

/* === Section Divider === */
.section-divider {
    text-align: center;
    margin: 20px 0 16px;
    font-size: 12px;
    color: var(--color-text-tertiary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-divider::before,
.section-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--color-border-light);
}

/* === Quick Links === */
.quick-links {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 20px;
}

/* === Responsive === */
@media (max-width: 768px) {
    .app-container {
        padding: 16px 12px 40px;
    }

    .app-header h1 {
        font-size: 18px;
    }

    .app-nav {
        gap: 4px;
    }

    .app-nav a {
        padding: 6px 12px;
        font-size: 12px;
    }

    .card {
        padding: 16px;
    }

    .form-row {
        flex-direction: column;
        gap: 12px;
    }

    .form-row .form-group {
        min-width: 100%;
    }

    .btn-group {
        flex-direction: column;
    }

    .btn-group .btn {
        width: 100%;
    }
}

/* === Animations === */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fadeIn 0.25s ease forwards;
}