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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #000000;
    color: #fff;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.6;
    position: relative;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    text-align: center;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: #ffffff;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-links a:hover {
    background: rgba(247, 147, 26, 0.2);
    color: #f7931a;
}

.nav-links a.active {
    background: #f7931a;
    color: #000;
    font-weight: bold;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo i {
    font-size: 32px;
    color: #f7931a;
    animation: pulse 2s infinite;
}

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, #f7931a, #ffb347);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Spending Calculator Styles */
.spending-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.spending-header {
    text-align: center;
    margin-bottom: 3rem;
}

.spending-header h1 {
    color: #f7931a;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.spending-header p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.period-toggle {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.toggle-btn {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #ffffff;
    cursor: pointer;
    transition: all 0.3s ease;
}

.toggle-btn:first-child {
    border-radius: 8px 0 0 8px;
}

.toggle-btn:last-child {
    border-radius: 0 8px 8px 0;
}

.toggle-btn.active {
    background: #f7931a;
    border-color: #f7931a;
    font-weight: bold;
}

.toggle-btn:hover:not(.active) {
    background: rgba(247, 147, 26, 0.2);
}

.category-list {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.category-entry {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 1rem;
    padding: 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    flex-wrap: wrap;
}

.category-entry select {
    flex: 2;
    min-width: 150px;
}

.category-entry input[type="number"] {
    flex: 1;
    min-width: 100px;
}

.category-entry input[type="date"] {
    flex: 1;
    min-width: 120px;
}

.remove-btn {
    background: #dc3545;
    border: none;
    color: white;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.remove-btn:hover {
    background: #c82333;
    transform: scale(1.05);
}

.add-category-btn {
    background: rgba(247, 147, 26, 0.2);
    border: 1px solid #f7931a;
    color: #f7931a;
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    margin-bottom: 1rem;
}

.add-category-btn:hover {
    background: rgba(247, 147, 26, 0.3);
    transform: translateY(-1px);
}

.total-spending {
    background: rgba(247, 147, 26, 0.1);
    border: 1px solid rgba(247, 147, 26, 0.3);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.total-amount {
    font-size: 1.5rem;
    font-weight: bold;
    color: #f7931a;
    margin-bottom: 0.5rem;
}

.total-label {
    color: #ffffff;
    opacity: 0.8;
}

.spending-calculator {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.input-group label {
    display: block;
    color: #ffffff;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.input-group input, .input-group select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: #ffffff;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.input-group select option {
    background: #1a1a1a;
    color: #ffffff;
}

.input-group input:focus, .input-group select:focus {
    outline: none;
    border-color: #f7931a;
    background: rgba(247, 147, 26, 0.1);
}

.calculate-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #f7931a, #ff6b35);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(247, 147, 26, 0.3);
}

.results-section {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: none;
}

.result-card {
    background: rgba(247, 147, 26, 0.1);
    border: 1px solid rgba(247, 147, 26, 0.3);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.result-value {
    font-size: 2rem;
    font-weight: bold;
    color: #f7931a;
    margin-bottom: 0.5rem;
}

.result-label {
    color: #ffffff;
    font-size: 0.9rem;
    opacity: 0.8;
}

.spending-history {
    margin-top: 2rem;
}

.history-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-date {
    color: #f7931a;
    font-weight: 500;
}

.history-amount {
    color: #ffffff;
}

/* Goal Section Styles */
.goal-section {
    margin: 1.5rem 0;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

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

.goal-toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 500;
    color: #f7931a;
    user-select: none;
}

.goal-toggle input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #f7931a;
    border-radius: 4px;
    margin-right: 10px;
    position: relative;
    transition: all 0.3s ease;
}

.goal-toggle input[type="checkbox"]:checked + .checkmark {
    background: #f7931a;
}

.goal-toggle input[type="checkbox"]:checked + .checkmark:after {
    content: '✓';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-weight: bold;
    font-size: 12px;
}

.goal-inputs {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.goal-results {
    margin-top: 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.goal-card {
    border: 2px solid #f7931a;
    background: rgba(247, 147, 26, 0.1);
}

.goal-card .result-value {
    color: #f7931a;
}

.goal-card .result-label {
    color: #fff;
    font-weight: 600;
}

/* ARR Section Styles */
.arr-section {
    margin: 1.5rem 0;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

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

.arr-toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 500;
    color: #28a745;
    user-select: none;
}

.arr-toggle input[type="checkbox"] {
    display: none;
}

.arr-toggle .checkmark {
    border-color: #28a745;
}

.arr-toggle input[type="checkbox"]:checked + .checkmark {
    background: #28a745;
}

.arr-inputs {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.arr-results {
    margin-top: 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.arr-card {
    border: 2px solid #28a745;
    background: rgba(40, 167, 69, 0.1);
}

.arr-card .result-value {
    color: #28a745;
}

.arr-card .result-label {
    color: #fff;
    font-weight: 600;
}

/* DCA/Lump Sum Page Styles */
.page-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.page-header h1 {
    color: #f7931a;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.page-header p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.input-section {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.investment-amount-section,
.strategy-selection {
    margin-bottom: 2rem;
}

.strategy-toggle {
    display: flex;
    gap: 0;
    margin-top: 1rem;
}

.strategy-btn {
    flex: 1;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #ffffff;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.strategy-btn:first-child {
    border-radius: 8px 0 0 8px;
}

.strategy-btn:last-child {
    border-radius: 0 8px 8px 0;
}

.strategy-btn.active {
    background: #f7931a;
    border-color: #f7931a;
    color: #000;
    font-weight: bold;
}

.strategy-btn:hover:not(.active) {
    background: rgba(247, 147, 26, 0.2);
}

.strategy-options {
    display: none;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.strategy-options.active {
    display: block;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.results-section {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.loading-spinner {
    text-align: center;
    padding: 3rem;
}

.loading-spinner i {
    font-size: 3rem;
    color: #f7931a;
    margin-bottom: 1rem;
}

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

.result-card {
    background: rgba(247, 147, 26, 0.1);
    border: 1px solid rgba(247, 147, 26, 0.3);
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.result-icon {
    font-size: 2rem;
    color: #f7931a;
}

.result-content h4 {
    color: #ffffff;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.8;
}

.result-value {
    font-size: 1.2rem;
    font-weight: bold;
    color: #f7931a;
}

.investment-summary {
    margin-bottom: 2rem;
}

.summary-details {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 1rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.summary-item:last-child {
    border-bottom: none;
}

.summary-label {
    color: rgba(255, 255, 255, 0.8);
}

.summary-value {
    color: #f7931a;
    font-weight: bold;
}

.chart-section {
    margin-top: 2rem;
}

.chart-container {
    height: 300px;
    margin-top: 1rem;
}

.error-message {
    text-align: center;
    padding: 2rem;
    color: #ff4444;
}

.error-message i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .spending-container {
        padding: 1rem;
    }
    
    .spending-header h1 {
        font-size: 2rem;
    }
    
    .category-entry {
        flex-direction: column;
        align-items: stretch;
    }
    
    .category-entry select,
    .category-entry input {
        min-width: auto;
        width: 100%;
    }
    
    .goal-results,
    .arr-results {
        grid-template-columns: 1fr;
    }
    
    .calculator-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .input-row {
        grid-template-columns: 1fr;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}