:root {
    --color-bg-default: #fff;
    --color-bg-secondary: #ecf1f4;
    --color-bg-brand: #0071b2;
    --color-bg-link: #0078d2;
    --color-bg-border: rgba(0,65,102,.2);
    --color-bg-stripe: rgba(0,32,51,.05);
    --color-bg-ghost: rgba(0,32,51,.08);
    --color-bg-tone: rgba(0,32,51,.85);
    --color-bg-soft: hsla(0,0%,100%,.9);
    --color-bg-system: #dee4e8;
    --color-bg-normal: #56b9f2;
    --color-bg-success: #22c38e;
    --color-bg-caution: #f2c94c;
    --color-bg-warning: #f38b00;
    --color-bg-alert: #eb5757;
    --color-bg-critical: #33000f;
    --color-typo-primary: #002033;
    --color-typo-secondary: rgba(0,32,51,.6);
    --color-typo-ghost: rgba(0,32,51,.3);
    --color-typo-brand: #0071b2;
    --color-typo-system: #97b2c4;
    --color-typo-normal: #33b4ff;
    --color-typo-success: #09b37b;
    --color-typo-caution: #ffa10a;
    --color-typo-warning: #e87502;
    --color-typo-alert: #eb3333;
    --color-typo-critical: #33000f;
    --color-typo-link: #0078d2;
    --color-typo-link-minor: #1c5682;
    --color-typo-link-hover: #008efa;
    --color-scroll-bg: rgba(0,66,105,.06);
    --color-scroll-thumb: rgba(0,66,105,.24);
    --color-scroll-thumb-hover: rgba(0,66,105,.32);
    --color-control-bg-default: #fff;
    --color-control-typo-default: #002033;
    --color-control-typo-placeholder: rgba(0,32,51,.35);
    --color-control-bg-border-default: rgba(0,66,105,.28);
    --color-control-bg-border-default-hover: rgba(0,66,105,.52);
    --color-control-bg-border-focus: #0091ff;
    --color-control-bg-focus: rgba(0,120,210,.3);
    --color-control-bg-active: rgba(0,120,210,.5);
    --color-control-bg-primary: #0078d2;
    --color-control-bg-primary-hover: #0091ff;
    --color-control-typo-primary: #fff;
    --color-control-typo-primary-hover: #fff;
    --color-control-bg-secondary: hsla(0,0%,100%,0);
    --color-control-bg-border-secondary: #0078d2;
    --color-control-bg-border-secondary-hover: #0091ff;
    --color-control-typo-secondary: #0078d2;
    --color-control-typo-secondary-hover: #0091ff;
    --color-control-bg-ghost: rgba(0,66,105,.07);
    --color-control-bg-ghost-hover: rgba(0,66,105,.05);
    --color-control-typo-ghost: rgba(0,57,92,.8);
    --color-control-typo-ghost-hover: rgba(0,57,92,.75);
    --color-control-bg-clear: rgba(0,66,105,0);
    --color-control-bg-clear-hover: rgba(0,66,105,.05);
    --color-control-typo-clear: rgba(0,57,92,.8);
    --color-control-typo-clear-hover: rgba(0,57,92,.75);
    --color-control-bg-disable: rgba(0,66,105,.07);
    --color-control-bg-border-disable: rgba(0,66,105,0);
    --color-control-typo-disable: rgba(0,32,51,.26);
    --color-shadow-group-1: rgba(0,32,51,.02);
    --color-shadow-group-2: rgba(0,32,51,.16);
    --color-shadow-layer-1: rgba(0,32,51,.04);
    --color-shadow-layer-2: rgba(0,32,51,.12);
    --color-shadow-modal-1: rgba(0,32,51,.04);
    --color-shadow-modal-2: rgba(0,32,51,.12);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--color-bg-secondary);
    color: var(--color-typo-primary);
}

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

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--color-bg-default);
    box-shadow: 0 2px 4px var(--color-shadow-layer-1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header h1 {
    font-size: 1.5rem;
    color: var(--color-typo-brand);
}

.main-nav {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--color-typo-secondary);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--color-typo-primary);
}

.nav-link.active {
    color: var(--color-typo-brand);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-typo-brand);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-name {
    font-weight: 500;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--color-bg-brand);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.app-main {
    flex: 1;
    padding: 2rem;
}

/* Table styles */
.table-container {
    background-color: var(--color-bg-default);
    border-radius: 8px;
    box-shadow: 0 1px 3px var(--color-shadow-layer-1);
    overflow: hidden;
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-bg-border);
}

.table-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.table-actions {
    display: flex;
    gap: 0.75rem;
}

.btn {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--color-control-bg-primary);
    color: var(--color-control-typo-primary);
}

.btn-primary:hover {
    background-color: var(--color-control-bg-primary-hover);
}

.btn-secondary {
    background-color: var(--color-control-bg-secondary);
    color: var(--color-control-typo-secondary);
    border: 1px solid var(--color-control-bg-border-secondary);
}

.btn-secondary:hover {
    color: var(--color-control-typo-secondary-hover);
    border-color: var(--color-control-bg-border-secondary-hover);
}

.btn-danger {
    background-color: var(--color-bg-alert);
    color: white;
}

.btn-danger:hover {
    background-color: #d14343;
}

.table-content {
    width: 100%;
    border-collapse: collapse;
}

.table-content thead {
    background-color: var(--color-bg-secondary);
}

.table-content th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-weight: 600;
    color: var(--color-typo-secondary);
    position: relative;
}

.table-content th.sortable {
    cursor: pointer;
}

.table-content th.sortable:hover {
    color: var(--color-typo-primary);
}

.table-content th.sortable::after {
    content: '↕';
    margin-left: 0.5rem;
    font-size: 0.8rem;
    opacity: 0.5;
}

.table-content th.asc::after {
    content: '↑';
    opacity: 1;
}

.table-content th.desc::after {
    content: '↓';
    opacity: 1;
}

.table-content td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-bg-border);
}

.table-content tr:last-child td {
    border-bottom: none;
}

.table-content tr:hover {
    background-color: var(--color-bg-stripe);
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-typo-secondary);
    padding: 0.25rem;
    border-radius: 4px;
    transition: all 0.2s;
}

.action-btn:hover {
    color: var(--color-typo-primary);
    background-color: var(--color-bg-ghost);
}

.action-btn.view {
    color: var(--color-typo-link);
}

.action-btn.edit {
    color: var(--color-typo-caution);
}

.action-btn.delete {
    color: var(--color-typo-alert);
}

/* Form styles */
.form-container {
    background-color: var(--color-bg-default);
    border-radius: 8px;
    box-shadow: 0 1px 3px var(--color-shadow-layer-1);
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.form-title {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--color-typo-brand);
}

.form-section {
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-bg-border);
    color: var(--color-typo-secondary);
}

.form-row {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-label.required::after {
    content: '*';
    color: var(--color-typo-alert);
    margin-left: 0.25rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-control-bg-border-default);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-control-bg-border-focus);
    box-shadow: 0 0 0 3px var(--color-control-bg-focus);
}

.form-control.textarea {
    min-height: 120px;
    resize: vertical;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

/* Status badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.badge.new {
    background-color: var(--color-bg-system);
    color: var(--color-typo-secondary);
}

.badge.approved {
    background-color: var(--color-bg-normal);
    color: white;
}

.badge.in_progress {
    background-color: var(--color-bg-caution);
    color: var(--color-typo-primary);
}

.badge.done {
    background-color: var(--color-bg-success);
    color: white;
}

/* Priority indicators */
.priority {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.priority-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.priority.low .priority-dot {
    background-color: var(--color-typo-success);
}

.priority.medium .priority-dot {
    background-color: var(--color-typo-caution);
}

.priority.high .priority-dot {
    background-color: var(--color-typo-warning);
}

.priority.critical .priority-dot {
    background-color: var(--color-typo-alert);
}

/* Type indicators */
.type {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.type-icon {
    font-size: 0.9rem;
}

.type.feature .type-icon {
    color: var(--color-typo-normal);
}

.type.bug .type-icon {
    color: var(--color-typo-alert);
}

.type.task .type-icon {
    color: var(--color-typo-secondary);
}

.type.improvement .type-icon {
    color: var(--color-typo-success);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .main-nav {
        width: 100%;
        justify-content: center;
    }
    
    .user-profile {
        width: 100%;
        justify-content: flex-end;
    }
    
    .app-main {
        padding: 1rem;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    .table-content {
        min-width: 700px;
    }
}