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

:root {
    --primary-color: #ec3750;
    --secondary-color: #338eda;
    --success-color: #33d6a6;
    --warning-color: #ff8c37;
    --danger-color: #ec3750;
    --dark: #1f2d3d;
    --light: #f9fafc;
    --border: #e0e6ed;
    --text: #273444;
    --text-light: #8492a6;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--light);
    color: var(--text);
    line-height: 1.6;
}

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

header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem 0;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

section {
    background: white;
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

h2 {
    color: var(--dark);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1.5rem;
    border-radius: 10px;
    color: white;
    text-align: center;
    transition: transform 0.3s;
}

.stat-card:nth-child(2) {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.stat-card:nth-child(3) {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.stat-card:nth-child(4) {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
}

/* Form Styles */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
}

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

.btn-primary:hover {
    background: #d62e47;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(236, 55, 80, 0.4);
}

.btn-secondary {
    background: var(--light);
    color: var(--text);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

/* Section Header */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.filters {
    display: flex;
    gap: 1rem;
}

.filters select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    background: white;
}

/* Events Grid */
.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.event-card {
    background: white;
    border: 2px solid var(--border);
    border-radius: 10px;
    padding: 1.5rem;
    transition: all 0.3s;
    position: relative;
}

.event-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
}

.event-card.priority-high {
    border-left: 4px solid var(--danger-color);
}

.event-card.priority-medium {
    border-left: 4px solid var(--warning-color);
}

.event-card.priority-low {
    border-left: 4px solid var(--success-color);
}

.event-header {
    margin-bottom: 1rem;
}

.event-title {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.event-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 0.85rem;
}

.event-description {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.event-date {
    font-size: 0.9rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.event-time-tracked {
    background: var(--light);
    padding: 0.5rem;
    border-radius: 6px;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.event-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.event-actions button {
    flex: 1;
    padding: 0.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
}

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

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

.btn-edit:hover,
.btn-delete:hover {
    opacity: 0.8;
    transform: scale(1.05);
}

#remindersList {
    margin-top: 1rem;
}

.reminder-item {
    background: var(--light);
    padding: 0.5rem;
    margin-top: 0.5rem;
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.reminder-item button {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .filters {
        width: 100%;
        flex-direction: column;
    }
}