:root {
    --background: 0 0% 100%;
    --foreground: 222.2 84% 4.9%;
    --card: 0 0% 100%;
    --card-foreground: 222.2 84% 4.9%;
    --popover: 0 0% 100%;
    --popover-foreground: 222.2 84% 4.9%;
    --primary: 222.2 47.4% 11.2%;
    --primary-foreground: 210 40% 98%;
    --secondary: 210 40% 96.1%;
    --secondary-foreground: 222.2 47.4% 11.2%;
    --muted: 210 40% 96.1%;
    --muted-foreground: 215.4 16.3% 46.9%;
    --accent: 210 40% 96.1%;
    --accent-foreground: 222.2 47.4% 11.2%;
    --destructive: 0 84.2% 60.2%;
    --destructive-foreground: 210 40% 98%;
    --border: 214.3 31.8% 91.4%;
    --input: 214.3 31.8% 91.4%;
    --ring: 222.2 84% 4.9%;
    --radius: 0.5rem;
    --admin-bg: 142 76% 94%;
    --admin-border: 142 76% 36%;
    --admin-badge: 142 76% 36%;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: hsl(var(--muted));
    min-height: 100vh;
    padding: 24px;
    color: hsl(var(--foreground));
    line-height: 1.5;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.header {
    margin-bottom: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.nav-button {
    height: 40px;
    padding: 0 16px;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid hsl(var(--border));
    border-radius: calc(var(--radius) - 2px);
    background: hsl(var(--card));
    color: hsl(var(--foreground));
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.nav-button:hover {
    background: hsl(var(--accent));
}

.nav-button svg {
    width: 16px;
    height: 16px;
}

.nav-button.mail-flow {
    background: hsl(0 84.2% 60.2%);
    color: white;
    border-color: hsl(0 84.2% 60.2%);
}

.nav-button.mail-flow:hover {
    background: hsl(0 84.2% 55%);
    border-color: hsl(0 84.2% 55%);
}

.dark .nav-button.mail-flow {
    background: hsl(0 84.2% 60.2%);
    color: white;
    border-color: hsl(0 84.2% 60.2%);
}

.dark .nav-button.mail-flow:hover {
    background: hsl(0 84.2% 65%);
    border-color: hsl(0 84.2% 65%);
}

.header-text h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: hsl(var(--foreground));
    margin-bottom: 4px;
}

.header-text p {
    font-size: 0.875rem;
    color: hsl(var(--muted-foreground));
}

.theme-toggle {
    height: 40px;
    width: 40px;
    padding: 0;
    border-radius: 50%;
    border: 1px solid hsl(var(--border));
    background: hsl(var(--card));
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.theme-toggle:hover {
    background: hsl(var(--accent));
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    color: hsl(var(--foreground));
}

.sun-icon {
    display: none;
}

.dark .sun-icon {
    display: block;
}

.dark .moon-icon {
    display: none;
}

.card {
    background: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
}

.search-section {
    padding: 24px;
    border-bottom: 1px solid hsl(var(--border));
}

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

.total-users-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: calc(var(--radius) - 4px);
    font-size: 0.75rem;
    font-weight: 500;
    background: hsl(var(--secondary));
    color: hsl(var(--secondary-foreground));
    border: 1px solid hsl(var(--border));
}

.search-wrapper {
    position: relative;
    flex: 1;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: hsl(var(--muted-foreground));
    width: 16px;
    height: 16px;
}

.search-input {
    width: 100%;
    height: 40px;
    padding: 0 16px 0 40px;
    font-size: 0.875rem;
    border: 1px solid hsl(var(--input));
    border-radius: calc(var(--radius) - 2px);
    background: hsl(var(--background));
    transition: all 0.15s ease;
    outline: none;
}

.search-input:focus {
    border-color: hsl(var(--ring));
    box-shadow: 0 0 0 3px hsl(var(--ring) / 0.1);
}

.search-input::placeholder {
    color: hsl(var(--muted-foreground));
}

.stats {
    display: flex;
    align-items: center;
    gap: 4px;
}

.stat-number {
    font-weight: 600;
    color: hsl(var(--foreground));
}

.tabs {
    display: flex;
    gap: 8px;
    padding: 24px 24px 0;
}

.tab {
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    background: transparent;
    color: hsl(var(--muted-foreground));
    cursor: pointer;
    transition: all 0.15s ease;
    border-bottom: 2px solid transparent;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.tab:hover {
    color: hsl(var(--foreground));
}

.tab.active {
    color: hsl(var(--foreground));
    border-bottom-color: hsl(var(--primary));
}

.tab-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 20px;
    padding: 0 6px;
    border-radius: 10px;
    font-size: 0.6875rem;
    font-weight: 600;
    background: hsl(var(--muted));
    color: hsl(var(--muted-foreground));
    transition: all 0.15s ease;
    text-align: center;
}

.tab.active .tab-count {
    background: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
}

.no-results {
    text-align: center;
    padding: 64px 24px;
    color: hsl(var(--muted-foreground));
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    body {
        padding: 16px;
    }

    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .tabs {
        padding: 16px 16px 0;
        gap: 4px;
        flex-wrap: wrap;
    }

    .tab {
        padding: 8px 12px;
        font-size: 0.75rem;
    }

    .search-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}

.dark {
    --background: 224 71% 4%;
    --foreground: 213 31% 91%;
    --card: 224 71% 4%;
    --card-foreground: 213 31% 91%;
    --muted: 223 47% 11%;
    --muted-foreground: 215.4 16.3% 56.9%;
    --border: 216 34% 17%;
    --input: 216 34% 17%;
    --ring: 213 31% 91%;
    --primary: 210 40% 98%;
    --primary-foreground: 222.2 47.4% 11.2%;
    --secondary: 222.2 47.4% 11.2%;
    --secondary-foreground: 210 40% 98%;
    --accent: 216 34% 17%;
    --accent-foreground: 210 40% 98%;
    --admin-bg: 142 76% 12%;
    --admin-border: 142 76% 36%;
    --admin-badge: 142 76% 36%;
}