:root {
    --primary: #F97316;
    --primary-hover: #EA580C;
    --primary-glow: rgba(249, 115, 22, .25);
    --secondary: #FB923C;
    --accent: #10B981;
    --accent-red: #EF4444;
    --bg: #0C0A0E;
    --bg-surface: #18141E;
    --bg-elevated: #231E2D;
    --bg-card: rgba(35, 30, 45, .8);
    --text: #E8E2F0;
    --text-secondary: #9B90AD;
    --text-muted: #5C5368;
    --border: rgba(249, 115, 22, .12);
    --border-strong: rgba(249, 115, 22, .25);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', 'Cascadia Code', monospace;
    --transition: 250ms cubic-bezier(.4, 0, .2, 1)
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0
}

html,
body {
    min-height: 100%;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased
}

.hidden {
    display: none !important
}

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 56px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px
}

.header h1 {
    font-size: 1rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text
}

.header-actions {
    display: flex;
    gap: 8px
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-family: var(--font);
    font-size: .8rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-xs);
    cursor: pointer;
    transition: all var(--transition)
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #fff;
    box-shadow: 0 2px 12px var(--primary-glow)
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--primary-glow)
}

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

.btn-secondary:hover {
    border-color: var(--border-strong)
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent
}

.btn-ghost:hover {
    color: var(--text);
    background: var(--bg-elevated)
}

.btn-danger {
    background: rgba(239, 68, 68, .1);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, .2)
}

.btn-danger:hover {
    background: rgba(239, 68, 68, .2)
}

.btn-sm {
    padding: 6px 12px;
    font-size: .72rem
}

.btn-lg {
    padding: 12px 28px;
    font-size: .9rem;
    border-radius: var(--radius)
}

.main {
    padding: 24px
}

.section-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0
}

.sub-title {
    font-size: .8rem;
    font-weight: 700;
    color: var(--text-secondary)
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    height: 22px;
    padding: 0 6px;
    background: var(--primary);
    color: #fff;
    border-radius: 11px;
    font-size: .65rem;
    font-weight: 700;
    margin-left: 8px
}

.layout-grid {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto
}

.flags-panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px
}

.right-panels {
    display: flex;
    flex-direction: column;
    gap: 20px
}

.editor-panel,
.preview-panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px
}

.flags-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: calc(100vh - 200px);
    overflow-y: auto
}

.flags-list::-webkit-scrollbar {
    width: 4px
}

.flags-list::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 2px
}

.flag-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition)
}

.flag-item:hover {
    border-color: var(--border-strong);
    background: var(--bg-elevated)
}

.flag-item.selected {
    border-color: var(--primary);
    background: rgba(249, 115, 22, .05)
}

.flag-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
    transition: background var(--transition)
}

.flag-dot.enabled {
    background: var(--accent)
}

.flag-dot.disabled {
    background: var(--accent-red)
}

.flag-info {
    flex: 1;
    overflow: hidden
}

.flag-info-name {
    font-size: .82rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis
}

.flag-info-desc {
    font-size: .68rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis
}

.flag-rollout {
    font-size: .68rem;
    font-weight: 700;
    color: var(--primary);
    flex-shrink: 0
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px
}

.form-grid-sm {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 10px
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 4px
}

.form-group.full-width {
    grid-column: 1/-1
}

.form-group.grow {
    flex: 1
}

.form-group label {
    font-size: .68rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: .05em
}

.hint {
    text-transform: none;
    letter-spacing: 0;
    font-weight: 400;
    opacity: .6
}

.input,
.textarea {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    font-family: var(--font);
    font-size: .82rem;
    outline: none;
    transition: border-color var(--transition)
}

.input:focus,
.textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow)
}

.textarea {
    resize: vertical;
    line-height: 1.5
}

.mono {
    font-family: var(--font-mono);
    font-size: .75rem
}

select.input {
    appearance: none;
    padding-right: 24px;
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%239B90AD' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center
}

.range-input {
    width: 100%;
    accent-color: var(--primary)
}

.rollout-control {
    display: flex;
    align-items: center;
    gap: 8px
}

.rollout-val {
    font-size: .82rem;
    font-weight: 700;
    color: var(--primary);
    min-width: 36px
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: .82rem
}

.toggle-label input {
    display: none
}

.toggle-switch {
    width: 36px;
    height: 20px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 10px;
    position: relative;
    transition: all var(--transition)
}

.toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    background: var(--text-muted);
    border-radius: 50%;
    transition: all var(--transition)
}

.toggle-label input:checked+.toggle-switch {
    background: var(--accent);
    border-color: var(--accent)
}

.toggle-label input:checked+.toggle-switch::after {
    left: 18px;
    background: #fff
}

.toggle-text {
    font-weight: 600;
    color: var(--text-secondary)
}

.targeting-section {
    margin-bottom: 16px
}

.rules-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 8px
}

.rule-item {
    display: grid;
    grid-template-columns: 100px 80px 1fr 28px;
    gap: 6px;
    align-items: center;
    padding: 8px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs)
}

.rule-item select,
.rule-item input {
    font-size: .72rem;
    padding: 4px 6px
}

.btn-remove {
    width: 28px;
    height: 28px;
    border: none;
    background: rgba(239, 68, 68, .1);
    color: var(--accent-red);
    border-radius: 4px;
    cursor: pointer;
    font-size: .7rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition)
}

.btn-remove:hover {
    background: rgba(239, 68, 68, .25)
}

.editor-actions {
    display: flex;
    gap: 8px
}

.test-user-form {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
    margin-bottom: 16px
}

.eval-results {
    display: flex;
    flex-direction: column;
    gap: 6px
}

.eval-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs)
}

.eval-flag-name {
    font-size: .82rem;
    font-weight: 600
}

.eval-value {
    font-family: var(--font-mono);
    font-size: .75rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px
}

.eval-value.true {
    background: rgba(16, 185, 129, .15);
    color: var(--accent)
}

.eval-value.false {
    background: rgba(239, 68, 68, .15);
    color: var(--accent-red)
}

.eval-value.other {
    background: rgba(249, 115, 22, .15);
    color: var(--primary)
}

.empty-state {
    text-align: center;
    padding: 32px 16px;
    color: var(--text-muted);
    font-size: .82rem
}

@media(max-width:900px) {
    .layout-grid {
        grid-template-columns: 1fr
    }

    .flags-panel {
        max-height: 300px
    }
}

@media(max-width:480px) {

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

    .rule-item {
        grid-template-columns: 1fr;
        gap: 4px
    }

    .main {
        padding: 16px
    }
}