:root {
    /* Color Palette */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --dark-bg: #0f0f23;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #b8b9d4;
    --accent-color: #00f2fe;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.3);
    --glow: 0 0 20px rgba(102, 126, 234, 0.5);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 15, 35, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--card-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo .accent {
    color: var(--accent-color);
    -webkit-text-fill-color: var(--accent-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--accent-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('hero-background.png');
    background-size: 150%;
    background-position: center 40%;
    background-repeat: no-repeat;
    z-index: -1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.7) 0%, rgba(118, 75, 162, 0.7) 100%);
    z-index: 1;
}

.hero-background::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: var(--secondary-gradient);
    border-radius: 50%;
    filter: blur(100px);
    bottom: -200px;
    left: -200px;
    opacity: 0.3;
    animation: float 15s infinite ease-in-out reverse;
    z-index: 2;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    33% {
        transform: translate(30px, -30px) rotate(120deg);
    }

    66% {
        transform: translate(-20px, 20px) rotate(240deg);
    }
}

.hero-content {
    text-align: center;
    z-index: 10;
    max-width: 800px;
    padding: var(--spacing-md);
    position: relative;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, #00f2fe 0%, #ffffff 50%, #4facfe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease-out;
    text-shadow: 0 2px 20px rgba(0, 242, 254, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--accent-gradient);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    animation: fadeInUp 1s ease-out 0.4s backwards;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg), var(--glow);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Services Section */
.services-section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    cursor: pointer;
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: var(--shadow-lg), var(--glow);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    color: white;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.service-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.service-features {
    list-style: none;
    padding: 0;
}

.service-features li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: 700;
}

/* Calculator Section */
.calculator-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.calculator-form,
.calculator-result {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 242, 254, 0.1);
}

/* Select dropdown options styling */
.form-control option {
    background-color: #1a1a2e;
    color: var(--text-primary);
    padding: 0.5rem;
}

.form-control option:hover,
.form-control option:focus,
.form-control option:checked {
    background-color: #667eea;
    color: white;
}

.slider {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--accent-gradient);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: var(--glow);
}

.slider-value {
    display: inline-block;
    margin-left: var(--spacing-sm);
    font-weight: 700;
    color: var(--accent-color);
}

.slider-unit {
    margin-left: var(--spacing-xs);
    color: var(--text-secondary);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.checkbox-label:hover {
    background: rgba(255, 255, 255, 0.05);
}

.checkbox-label input[type="checkbox"] {
    margin-right: var(--spacing-xs);
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.calculate-btn,
.generate-invoice-btn,
.booking-btn,
.print-btn,
.download-btn {
    width: 100%;
    padding: 1rem;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: var(--spacing-sm);
}

.calculate-btn:hover,
.generate-invoice-btn:hover,
.booking-btn:hover,
.print-btn:hover,
.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow);
}

.calculator-result h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.placeholder-text {
    color: var(--text-secondary);
    text-align: center;
    padding: var(--spacing-md);
}

.price-breakdown {
    margin-bottom: var(--spacing-sm);
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--card-border);
}

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

.total-price {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: rgba(0, 242, 254, 0.1);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
}

.price-amount {
    color: var(--accent-color);
    font-size: 2rem;
}

/* Booking Section */
.booking-section {
    padding: var(--spacing-xl) 0;
}

.booking-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.calendar-container,
.booking-form {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    backdrop-filter: blur(10px);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.calendar-nav {
    background: var(--accent-gradient);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.calendar-nav:hover {
    transform: scale(1.1);
    box-shadow: var(--glow);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: var(--spacing-xs);
}

.calendar-day-header {
    text-align: center;
    padding: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid transparent;
}

.calendar-day:hover:not(.disabled):not(.other-month) {
    background: rgba(102, 126, 234, 0.2);
    border-color: var(--accent-color);
}

.calendar-day.selected {
    background: var(--accent-gradient);
    color: white;
    font-weight: 700;
}

.calendar-day.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.calendar-day.other-month {
    opacity: 0.3;
}

.calendar-day.today {
    border: 2px solid var(--accent-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--dark-bg);
    border: 1px solid var(--card-border);
    margin: 5% auto;
    padding: var(--spacing-md);
    width: 90%;
    max-width: 600px;
    border-radius: var(--radius-md);
    position: relative;
    animation: slideIn 0.3s ease-out;
}

.invoice-content {
    max-width: 800px;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close-modal {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.close-modal:hover {
    color: var(--accent-color);
    transform: rotate(90deg);
}

.confirmation-message {
    text-align: center;
    padding: var(--spacing-md);
}

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    font-size: 3rem;
    color: white;
}

/* Invoice */
.invoice-document {
    background: white;
    color: #333;
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
}

.invoice-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid #667eea;
}

.invoice-title {
    font-size: 2rem;
    color: #667eea;
}

.invoice-number {
    color: #666;
}

.invoice-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.invoice-section {
    margin-bottom: var(--spacing-sm);
}

.invoice-section h4 {
    color: #667eea;
    margin-bottom: var(--spacing-xs);
}

.invoice-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-sm) 0;
}

.invoice-table th {
    background: #667eea;
    color: white;
    padding: var(--spacing-xs);
    text-align: left;
}

.invoice-table td {
    padding: var(--spacing-xs);
    border-bottom: 1px solid #ddd;
}

.invoice-total {
    text-align: right;
    font-size: 1.5rem;
    font-weight: 700;
    color: #667eea;
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 2px solid #667eea;
}

.invoice-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.invoice-actions button {
    flex: 1;
}

/* Contact Section */
.contact-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, rgba(102, 126, 234, 0.05) 0%, transparent 100%);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.contact-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    backdrop-filter: blur(10px);
}

.contact-item h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--accent-color);
}

/* Footer */
.footer {
    background: rgba(15, 15, 35, 0.9);
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid var(--card-border);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .hero-title {
        font-size: 2rem;
    }

    .calculator-container,
    .booking-container {
        grid-template-columns: 1fr;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
}