/* Base styles */
body {
    font-family: Arial, sans-serif;
    line-height: 1.5;
    color: #333;
}

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

/* Layout */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.min-h-screen {
    min-height: 100vh;
}

/* Typography */
.text-2xl {
    font-size: 1.5rem;
}

.font-bold {
    font-weight: bold;
}

.text-sm {
    font-size: 0.875rem;
}

/* Spacing */
.px-4 {
    padding-left: 1rem;
    padding-right: 1rem;
}

.py-4 {
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.py-8 {
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.space-x-4 > * + * {
    margin-left: 1rem;
}

.mb-8 {
    margin-bottom: 2rem;
}

.mt-8 {
    margin-top: 2rem;
}

/* Grid */
.grid {
    display: grid;
}

.gap-6 {
    gap: 1.5rem;
}

.gap-8 {
    gap: 2rem;
}

/* Card */
.card {
    background-color: #fff;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.card-header {
    padding: 1rem;
    border-bottom: 1px solid #e5e5e5;
}

.card-title {
    font-size: 1.25rem;
    font-weight: bold;
}

.card-content {
    padding: 1rem;
}

/* Button */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    font-weight: 500;
    background-color: #3b82f6;
    color: #fff;
    cursor: pointer;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid #e5e5e5;
    color: #333;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

/* Table */
table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #e5e5e5;
}

/* Icons */
.icon-calendar, .icon-mail, .icon-bar-chart, .chevron-down {
    display: inline-block;
    width: 1em;
    height: 1em;
    margin-right: 0.5em;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.icon-calendar {
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="4" width="18" height="18" rx="2" ry="2"></rect><line x1="16" y1="2" x2="16" y2="6"></line><line x1="8" y1="2" x2="8" y2="6"></line><line x1="3" y1="10" x2="21" y2="10"></line></svg>');
}

.icon-mail {
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M4 4h16c1.1 0 2 .9 2 2v12c0 1.1-.9 2-2 2H4c-1.1 0-2-.9-2-2V6c0-1.1.9-2 2-2z"></path><polyline points="22,6 12,13 2,6"></polyline></svg>');
}

.icon-bar-chart {
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="12" y1="20" x2="12" y2="10"></line><line x1="18" y1="20" x2="18" y2="4"></line><line x1="6" y1="20" x2="6" y2="16"></line></svg>');
}

.chevron-down {
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"></polyline></svg>');
}

/* Responsive design */
@media (min-width: 768px) {
    .md\:grid-cols-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-4 {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}