@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap');

:root {
    --primary-color: #0f172a; /* Slate 900 */
    --accent-color: #3b82f6; /* Blue 500 */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --bg-color: #f1f5f9; /* Slate 100 */
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Layout */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
header {
    background-color: var(--card-bg);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: -0.025em;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #f8fafc;
}

.card-title {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 2px;
}

.tab-link {
    padding: 0.75rem 1.5rem;
    border: none;
    background: none;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent; /* Reserve space */
    transition: all 0.2s;
    margin-bottom: -4px; /* Align with container border */
}

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

.tab-link.active {
    color: var(--accent-color);
    border-bottom: 2px solid var(--accent-color);
}

.tab-content {
    display: none; /* Crucial for tab switching */
    animation: fadeIn 0.4s ease;
}

.tab-content.active {
    display: block;
}

/* Tables */
.table-container {
    width: 100%;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.925rem;
}

th, td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: #f8fafc;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

tr:hover td {
    background-color: #f8fafc;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    background-color: var(--primary-color);
    color: white;
    font-weight: 500;
    border-radius: var(--radius-sm);
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.btn:hover {
    background-color: #1e293b;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background-color: #f8fafc;
    border-color: #cbd5e1;
}

/* Badges */
.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-new {
    background-color: #ecfdf5; /* Green 50 */
    color: #059669; /* Green 600 */
    border: 1px solid #d1fae5;
}

.badge-call {
    background-color: #fff7ed; /* Orange 50 */
    color: #ea580c; /* Orange 600 */
    border: 1px solid #ffedd5;
}

/* Forms */
input, select, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: white;
    box-sizing: border-box;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Utilities */
.text-muted { color: var(--text-secondary); }
.mt-4 { margin-top: 1.5rem; }