:root {
    --bg-color: #f5f5f7;
    --card-bg: #ffffff;
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --accent-color: #0071e3;
    --accent-hover: #0077ed;
    --danger-color: #ff3b30;
    --success-color: #34c759;
    --border-radius: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
}

a {
    text-decoration: none;
    color: var(--accent-color);
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-hover);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
}

/* Cards & Layout */
.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s ease;
}

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

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    margin-top: 20px;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 999px; /* Pill shape */
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: scale(1.02);
}

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

/* Forms */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--border-radius);
    border: 1px solid #d2d2d7;
    background: #fff;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
}

/* Auth Page */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #fff;
}

.auth-card {
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.auth-card h1 {
    margin-bottom: 30px;
    font-size: 24px;
    font-weight: 600;
}

/* Tables */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

th {
    text-align: left;
    padding: 12px 16px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85rem;
    border-bottom: 1px solid #e5e5e5;
}

td {
    padding: 16px;
    vertical-align: middle;
    border-bottom: 1px solid #f5f5f7;
}

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