/* ===========================
   CSS Reset & Base Styles
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --solar-yellow: #FDB813;
    --solar-yellow-light: #FFCA3A;
    --solar-yellow-dark: #E5A50A;
    --navy-blue: #003366;
    --navy-blue-light: #004C99;
    --navy-blue-dark: #002244;
    --white: #FFFFFF;
    --off-white: #F8F9FA;
    --light-gray: #E9ECEF;
    --medium-gray: #6C757D;
    --dark-gray: #343A40;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 30px rgba(253, 184, 19, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--dark-gray);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ===========================
   Typography
   =========================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--navy-blue);
}

/* ===========================
   Navigation
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--navy-blue);
    background: linear-gradient(135deg, var(--navy-blue) 0%, var(--navy-blue-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-image {
    height: 50px;
    width: auto;
    display: block;
    transition: transform var(--transition-base);
}

.logo-image:hover {
    transform: scale(1.05);
}

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

.nav-link {
    color: var(--navy-blue);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--solar-yellow);
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--solar-yellow-dark);
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--navy-blue);
    transition: all var(--transition-base);
}

/* ===========================
   Buttons
   =========================== */
.btn {
    font-family: var(--font-primary);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--solar-yellow) 0%, var(--solar-yellow-dark) 100%);
    color: var(--navy-blue);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
    background: var(--white);
    color: var(--navy-blue);
    border: 2px solid var(--navy-blue);
}

.btn-secondary:hover {
    background: var(--navy-blue);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--navy-blue);
    border: 2px solid var(--navy-blue);
}

.btn-outline:hover {
    background: var(--navy-blue);
    color: var(--white);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
}

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

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #F0F8FF 0%, #E6F3FF 50%, #FFF9E6 100%);
    z-index: -1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(253, 184, 19, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    padding: var(--spacing-3xl) 0;
}

.hero-text {
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.highlight {
    background: linear-gradient(135deg, var(--solar-yellow) 0%, var(--solar-yellow-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--medium-gray);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.stat {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--navy-blue);
    font-family: var(--font-display);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--medium-gray);
    margin-top: var(--spacing-xs);
}

.hero-image {
    position: relative;
    animation: fadeInRight 1s ease-out;
}

.solar-panel-graphic {
    position: relative;
    width: 100%;
    height: 500px;
    background: linear-gradient(135deg, var(--navy-blue) 0%, var(--navy-blue-light) 100%);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.solar-panel-graphic::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 20%;
    width: 60%;
    height: 60%;
    background: repeating-linear-gradient(90deg,
            var(--solar-yellow) 0px,
            var(--solar-yellow) 10px,
            var(--navy-blue-light) 10px,
            var(--navy-blue-light) 20px);
    transform: rotate(-15deg);
    opacity: 0.3;
}

.panel-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(253, 184, 19, 0.4) 0%, transparent 70%);
    animation: pulse 3s ease-in-out infinite;
}

/* ===========================
   Solar Savings Calculator
   =========================== */
.calculator {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #F0F8FF 0%, #FFF9E6 100%);
    position: relative;
    overflow: hidden;
}

.calculator::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(253, 184, 19, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.calculator-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    border: 2px solid transparent;
    transition: all var(--transition-base);
}

.calculator-card:hover {
    border-color: var(--solar-yellow);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.calculator-input-section {
    margin-bottom: var(--spacing-2xl);
    text-align: center;
}

.calculator-label {
    display: block;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--navy-blue);
    margin-bottom: var(--spacing-md);
}

.bill-display {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-xl);
}

.currency {
    font-size: 2rem;
    color: var(--medium-gray);
    font-weight: 600;
}

.bill-amount {
    font-size: 4rem;
    font-weight: 800;
    color: var(--navy-blue);
    font-family: var(--font-display);
    background: linear-gradient(135deg, var(--navy-blue) 0%, var(--navy-blue-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all var(--transition-base);
}

.slider-container {
    max-width: 600px;
    margin: 0 auto;
}

.bill-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 12px;
    border-radius: 6px;
    background: linear-gradient(to right, var(--solar-yellow) 0%, var(--solar-yellow-dark) 100%);
    outline: none;
    opacity: 0.9;
    transition: opacity var(--transition-base);
    cursor: pointer;
}

.bill-slider:hover {
    opacity: 1;
}

.bill-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--white);
    border: 4px solid var(--solar-yellow);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.bill-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.bill-slider::-moz-range-thumb {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--white);
    border: 4px solid var(--solar-yellow);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.bill-slider::-moz-range-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--medium-gray);
    font-weight: 500;
}

.calculator-results {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.result-card {
    background: var(--off-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.result-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--solar-yellow);
}

.result-highlight {
    background: linear-gradient(135deg, rgba(253, 184, 19, 0.1) 0%, rgba(253, 184, 19, 0.05) 100%);
    border-color: var(--solar-yellow);
}

.result-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

.result-content {
    flex: 1;
}

.result-label {
    font-size: 0.875rem;
    color: var(--medium-gray);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.result-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--navy-blue);
    font-family: var(--font-display);
    transition: all var(--transition-base);
}

.calculator-disclaimer {
    text-align: center;
    font-size: 0.75rem;
    color: var(--medium-gray);
    margin-top: var(--spacing-md);
    font-style: italic;
}

/* ===========================
   Packages Section
   =========================== */
.packages {
    padding: var(--spacing-3xl) 0;
    background: var(--off-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--medium-gray);
}

.packages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.package-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    position: relative;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.package-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--solar-yellow);
}

.package-featured {
    border-color: var(--solar-yellow);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.package-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--navy-blue);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-featured {
    background: linear-gradient(135deg, var(--solar-yellow) 0%, var(--solar-yellow-dark) 100%);
    color: var(--navy-blue);
}

.package-header {
    margin-bottom: var(--spacing-lg);
}

.package-name {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.package-tagline {
    color: var(--medium-gray);
    font-size: 1rem;
}

.package-price {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--light-gray);
}

.price-symbol {
    font-size: 1.5rem;
    color: var(--medium-gray);
}

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--navy-blue);
    font-family: var(--font-display);
}

.price-period {
    font-size: 1rem;
    color: var(--medium-gray);
}

.package-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.check-icon {
    width: 20px;
    height: 20px;
    color: var(--solar-yellow);
    flex-shrink: 0;
    margin-top: 2px;
}

.feature-item span {
    color: var(--dark-gray);
}

/* ===========================
   About Section
   =========================== */
.about {
    padding: var(--spacing-3xl) 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-description {
    font-size: 1.125rem;
    color: var(--medium-gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.value-item {
    text-align: center;
}

.value-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.value-title {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.value-text {
    font-size: 0.875rem;
    color: var(--medium-gray);
}

.about-image {
    position: relative;
}

.image-placeholder {
    width: 100%;
    height: 500px;
    background: linear-gradient(135deg, var(--off-white) 0%, var(--light-gray) 100%);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.solar-home-illustration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: linear-gradient(135deg, var(--navy-blue) 0%, var(--navy-blue-light) 100%);
    border-radius: var(--radius-xl);
    opacity: 0.1;
}

/* ===========================
   Contact Section
   =========================== */
.contact {
    padding: var(--spacing-3xl) 0;
    background: var(--off-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-form {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

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

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

.form-input {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--light-gray);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--solar-yellow);
    box-shadow: 0 0 0 3px rgba(253, 184, 19, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.info-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.info-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.info-title {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.info-text {
    color: var(--navy-blue);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.info-subtext {
    font-size: 0.875rem;
    color: var(--medium-gray);
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: var(--navy-blue);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo-text {
    color: var(--white);
    background: linear-gradient(135deg, var(--white) 0%, var(--solar-yellow) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-tagline {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--solar-yellow);
    margin: var(--spacing-md) 0 var(--spacing-xs);
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-heading {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--solar-yellow);
}

.footer-list {
    list-style: none;
}

.footer-list li {
    margin-bottom: var(--spacing-sm);
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--solar-yellow);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-copyright,
.footer-made {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* ===========================
   App Store Badges
   =========================== */
.app-store-badges {
    margin-top: var(--spacing-xl);
}

.app-store-heading {
    font-size: 1rem;
    color: var(--solar-yellow);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.badge-container {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.app-badge-link {
    display: inline-block;
    transition: all var(--transition-base);
}

.app-badge {
    height: 45px;
    width: auto;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.app-badge-link:hover {
    transform: translateY(-3px);
}

.app-badge-link:hover .app-badge {
    box-shadow: var(--shadow-lg);
}

/* ===========================
   Modal
   =========================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease-out;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--medium-gray);
    cursor: pointer;
    transition: color var(--transition-fast);
    line-height: 1;
}

.modal-close:hover {
    color: var(--navy-blue);
}

.modal-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.modal-subtitle {
    color: var(--medium-gray);
    margin-bottom: var(--spacing-xl);
}

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

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

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

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

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-30px);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.4;
        transform: translate(-50%, -50%) scale(1);
    }

    50% {
        opacity: 0.6;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

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

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

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 968px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }

    .calculator-results {
        grid-template-columns: 1fr;
    }

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

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-values {
        grid-template-columns: 1fr;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }

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

    .bill-amount {
        font-size: 3rem;
    }

    .result-value {
        font-size: 1.5rem;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .stat-number {
        font-size: 1.5rem;
    }
}