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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

/* Auth Styles */
.auth-container {
    max-width: 400px;
    margin: 100px auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    overflow: hidden;
}

.auth-tabs {
    display: flex;
}

.tab-btn {
    flex: 1;
    padding: 15px;
    border: none;
    background: #f8f9fa;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

.tab-btn.active {
    background: white;
    font-weight: bold;
    border-bottom: 2px solid #667eea;
}

.tab-content {
    padding: 30px;
}

.tab-content:not(.active) {
    display: none;
}

.tab-content input {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.tab-content button {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 10px;
}

/* Dashboard Styles */
.dashboard {
    background: white;
    min-height: 100vh;
}

.header {
    background: #2c3e50;
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-menu button {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
}

.main-content {
    display: flex;
    min-height: calc(100vh - 80px);
}

.sidebar {
    width: 250px;
    background: #34495e;
    color: white;
}

.nav-btn {
    width: 100%;
    padding: 15px 20px;
    background: none;
    border: none;
    color: white;
    text-align: left;
    cursor: pointer;
    border-bottom: 1px solid #2c3e50;
    transition: background 0.3s;
}

.nav-btn.active, .nav-btn:hover {
    background: #3498db;
}

.content {
    flex: 1;
    padding: 2rem;
    background: #ecf0f1;
}

.content-section:not(.active) {
    display: none;
}

.overview-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}

.card h3 {
    color: #7f8c8d;
    margin-bottom: 0.5rem;
}

.card p {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c3e50;
}

.calendar-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
    background: white;
    padding: 1rem;
    border-radius: 10px;
}

.calendar-day {
    padding: 10px;
    border: 1px solid #ecf0f1;
    min-height: 80px;
    background: white;
}

.calendar-day.header {
    background: #34495e;
    color: white;
    text-align: center;
    font-weight: bold;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
}

.modal-content input,
.modal-content select {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.modal-actions {
    display: flex;
    gap: 10px;
    margin-top: 1rem;
}

.modal-actions button {
    flex: 1;
    padding: 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.btn-primary {
    background: #3498db;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 1rem;
}

.bills-list,
.goals-list,
.accounts-list {
    display: grid;
    gap: 1rem;
}

.bill-item,
.goal-item,
.account-item {
    background: white;
    padding: 1rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    border-left: 4px solid #3498db;
}

.account-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.btn-danger {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 3px;
    cursor: pointer;
}

.no-accounts {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    color: #7f8c8d;
}

.bank-connect {
    text-align: center;
    margin-bottom: 2rem;
    padding: 2rem;
    background: white;
    border-radius: 10px;
}