/* --- CSS Variables for Theming --- */
:root {
  /* Palette */
  --clr-black: #000000;
  --clr-white: #ffffff;
  --clr-grey: #d2d2d2;
  --clr-green-main: #009f33;
  --clr-green-dark: #005c30;
  --clr-green-light: #28b80e;

  /* Light Theme */
  --bg-color: #f8f9fa;
  --text-color: #212529;
  --heading-color: var(--clr-black);
  --subtle-text-color: #6c757d;
  --primary-color: var(--clr-green-main);
  --primary-hover-color: var(--clr-green-dark);
  --secondary-color: var(--clr-green-light);
  --secondary-hover-color: #6c8c18; /* Darken light green */
  --accent-color: var(--clr-green-main);
  --light-bg-color: #e9f5ee;
  --card-bg-color: var(--clr-white);
  --card-shadow-color: rgba(0, 0, 0, 0.08);
  --border-color: #dee2e6;
  --footer-bg-color: #212529;
  --footer-text-color: var(--clr-grey);
  --footer-heading-color: var(--clr-white);
  --hero-bg-gradient: linear-gradient(to right, #e9f5ee, #d4ecdf);
  --hero-text-color: var(--clr-green-dark);
  --hero-sub-text-color: #007a27;
  --hamburger-color: #333;
  --form-bg-color: var(--clr-white);
  --form-focus-shadow: rgba(0, 159, 51, 0.2);
  --featured-bg: #f0fff0;
  --featured-border: var(--clr-green-light);
  --calc-key-bg: #E0E0E0;
  --calc-key-hover-bg: #D0D0D0;
  --calc-op-key-bg: #d4ecdf;
  --calc-op-key-hover-bg: #b8d9c5;
  --calc-eq-key-bg: var(--primary-color);
  --calc-eq-key-hover-bg: var(--primary-hover-color);
  --calc-clear-key-bg: #e74c3c;
  --calc-clear-key-hover-bg: #c0392b;
}

body.dark-mode {
  /* Dark Theme */
  --bg-color: #121212;
  --text-color: var(--clr-grey);
  --heading-color: var(--clr-white);
  --subtle-text-color: #bbbbbb;
  --primary-color: var(--clr-green-main);
  --primary-hover-color: var(--clr-green-light);
  --secondary-color: var(--clr-green-light);
  --secondary-hover-color: #a1d124; /* Lighten light green */
  --accent-color: var(--clr-green-light);
  --light-bg-color: #1e1e1e;
  --card-bg-color: #212121;
  --card-shadow-color: rgba(0, 0, 0, 0.4);
  --border-color: #444;
  --footer-bg-color: var(--clr-black);
  --footer-text-color: var(--clr-grey);
  --footer-heading-color: var(--clr-white);
  --hero-bg-gradient: linear-gradient(to right, var(--clr-green-dark), var(--clr-green-main));
  --hero-text-color: var(--clr-white);
  --hero-sub-text-color: #c8e6c9;
  --hamburger-color: var(--clr-white);
  --form-bg-color: #212121;
  --form-focus-shadow: rgba(0, 159, 51, 0.3);
  --featured-bg: #2c3e50;
  --featured-border: var(--clr-green-light);
  --calc-key-bg: #4A5568;
  --calc-key-hover-bg: #5A6A7D;
  --calc-op-key-bg: #3a4a5d;
  --calc-op-key-hover-bg: #4A5568;
  --calc-eq-key-bg: var(--primary-color);
  --calc-eq-key-hover-bg: var(--primary-hover-color);
  --calc-clear-key-bg: #c0392b;
  --calc-clear-key-hover-bg: #a53125;
}

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

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    scroll-behavior: smooth;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Quicksand', sans-serif;
    color: var(--heading-color);
    margin-bottom: 0.8em;
}

h1 { font-size: 2.8em; text-align: center; margin-bottom: 0.5em; }
h2 { font-size: 2.2em; text-align: center; margin-bottom: 1.2em; }
h3 { font-size: 1.6em; }

p {
    margin-bottom: 1em;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-hover-color);
    text-decoration: underline;
}

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

.section-spacing {
    padding: 80px 0;
}

.light-bg {
    background-color: var(--light-bg-color);
}

.section-description {
    text-align: center;
    font-size: 1.1em;
    margin-bottom: 2em;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.rounded-square {
    border-radius: 15px;
    overflow: hidden;
}

/* --- Buttons --- */
.button {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    border: none;
}

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

.primary-button:hover {
    background-color: var(--primary-hover-color);
    transform: translateY(-2px);
    text-decoration: none;
}

.secondary-button {
    background-color: var(--secondary-color);
    color: var(--clr-white);
}

.secondary-button:hover {
    background-color: var(--secondary-hover-color);
    transform: translateY(-2px);
    text-decoration: none;
}

.large-button {
    font-size: 1.3em;
    padding: 16px 32px;
}

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

.button-container {
    margin-top: 3em;
}

/* --- Header & Navigation --- */
.site-header {
    background-color: var(--card-bg-color);
    padding: 15px 0;
    box-shadow: 0 2px 10px var(--card-shadow-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s ease;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-logo {
    font-family: 'Quicksand', sans-serif;
    font-size: 1.8em;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
}

.main-nav .nav-links {
    list-style: none;
    display: flex;
    align-items: center;
}

.main-nav .nav-links li {
    margin-left: 30px;
}

.main-nav .nav-links a {
    font-weight: 600;
    color: var(--subtle-text-color);
    padding: 5px 0;
    position: relative;
}

.main-nav .nav-links a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.main-nav .nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--primary-color);
    transition: width 0.3s ease-in-out;
}

.main-nav .nav-links a:hover::after,
.main-nav .nav-links a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    position: relative;
    z-index: 1100;
}

.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--hamburger-color);
    margin: 5px auto;
    transition: all 0.3s ease-in-out;
}

.nav-toggle.open .hamburger:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.open .hamburger:nth-child(2) { opacity: 0; }
.nav-toggle.open .hamburger:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.dark-mode-toggle {
    background: none;
    border: none;
    color: var(--subtle-text-color);
    cursor: pointer;
    font-size: 1.4em;
    padding: 5px;
    margin-left: 15px;
    transition: color 0.3s ease;
}

.dark-mode-toggle:hover {
    color: var(--primary-color);
}


/* --- Hero Section --- */
.hero-section {
    background: var(--hero-bg-gradient);
    color: var(--hero-text-color);
    text-align: center;
    padding: 100px 0;
    overflow: hidden;
}

.hero-section .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

.hero-content {
    max-width: 700px;
    text-align: center;
}

.hero-content h1 {
    font-size: 3.5em;
    margin-bottom: 0.3em;
    color: var(--hero-text-color);
}

.hero-content .sub-headline {
    font-size: 1.4em;
    margin-bottom: 1.5em;
    font-weight: 300;
    color: var(--hero-sub-text-color);
}

.hero-image-placeholder {
    width: 100%;
    max-width: 600px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    box-shadow: 0 8px 20px var(--card-shadow-color);
}

.hero-image-placeholder img {
    width: 100%;
    height: auto;
    border-radius: 15px;
    display: block;
}

.small-text {
    font-size: 0.9em;
    opacity: 0.8;
    margin-top: 10px;
}


/* --- Services Overview Section --- */
.services-overview .service-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 2em;
}

.service-card {
    background-color: var(--card-bg-color);
    padding: 30px;
    box-shadow: 0 4px 15px var(--card-shadow-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 25px var(--card-shadow-color);
}

.service-card .icon-large {
    font-size: 3.5em;
    color: var(--primary-color);
    margin-bottom: 0.5em;
}

.service-card p {
    font-size: 1em;
    line-height: 1.5;
    color: var(--subtle-text-color);
}

/* --- How It Works Section --- */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 2em;
}

.step-card {
    background-color: var(--card-bg-color);
    padding: 30px;
    box-shadow: 0 4px 15px var(--card-shadow-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
}

.step-number {
    background-color: var(--accent-color);
    color: var(--clr-white);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8em;
    font-weight: 700;
    margin-bottom: 1em;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.step-card h3 {
    margin-top: 0.5em;
}

/* --- Testimonials Section --- */
.testimonial-carousel {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2em;
}

.testimonial-card {
    background-color: var(--card-bg-color);
    padding: 30px;
    box-shadow: 0 4px 15px var(--card-shadow-color);
    max-width: 400px;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.testimonial-card p {
    font-style: italic;
    margin-bottom: 1em;
    color: var(--subtle-text-color);
}

.testimonial-card cite {
    display: block;
    text-align: right;
    font-weight: 600;
    color: var(--primary-color);
    margin-top: 1em;
}

/* --- Services Page Section (Detailed) --- */
.services-page .service-category-block {
    background-color: var(--card-bg-color);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px var(--card-shadow-color);
}

.services-page .service-category-block h3 {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 1em;
}

.services-page .service-icon-small {
    font-size: 1.8em;
    color: var(--primary-color);
}

.services-page ul {
    list-style: none;
    margin-bottom: 1em;
}

.services-page ul li {
    padding: 8px 0;
    border-bottom: 1px dashed var(--light-bg-color);
    color: var(--subtle-text-color);
}

.services-page ul li:last-child {
    border-bottom: none;
}

.services-page .why-choose-us {
    font-style: italic;
    font-size: 0.95em;
    margin-top: 1.5em;
    padding-top: 1em;
    border-top: 1px solid var(--light-bg-color);
}

/* --- About Us Page Section --- */
.about-us-page .about-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    align-items: center;
    justify-content: center;
}

.about-image {
    flex: 0 0 auto;
    width: 300px;
    height: 400px;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: 0 4px 15px var(--card-shadow-color);
    background-color: var(--secondary-color);
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 15px;
}

.about-text {
    flex: 1;
    min-width: 300px;
    background-color: var(--card-bg-color);
    padding: 30px;
    box-shadow: 0 4px 15px var(--card-shadow-color);
}

.about-text p {
    margin-bottom: 1.2em;
    line-height: 1.7;
}

.about-text strong {
    color: var(--heading-color);
}

/* --- Pricing Page Section --- */
.pricing-flex-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin-top: 2em;
}

.pricing-card {
    background-color: var(--card-bg-color);
    padding: 30px;
    box-shadow: 0 4px 15px var(--card-shadow-color);
    flex: 1;
    min-width: 280px;
    max-width: 380px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.pricing-card .price-figure {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5em;
}

.pricing-card ul {
    list-style: none;
    text-align: left;
    margin: 1em 0 1.5em;
}

.pricing-card ul li {
    margin-bottom: 0.5em;
    font-size: 0.95em;
    color: var(--subtle-text-color);
}

.pricing-card ul li::before {
    content: "\f00c";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    color: var(--primary-color);
    margin-right: 8px;
}

.pricing-card .button {
    margin-top: auto;
}

.featured-pricing {
    background-color: var(--featured-bg);
    box-shadow: 0 8px 20px var(--card-shadow-color);
    border: 2px solid var(--featured-border);
}

.featured-pricing .price-figure {
    color: var(--accent-color);
}

.privacy-note {
    margin-top: 3em;
    font-size: 0.85em;
    color: var(--subtle-text-color);
}

/* --- Contact Page Section --- */
.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 2em;
    margin-bottom: 40px;
}

.contact-card {
    background-color: var(--card-bg-color);
    padding: 30px;
    box-shadow: 0 4px 15px var(--card-shadow-color);
    text-align: center;
}

.contact-card .icon-large {
    font-size: 3em;
    margin-bottom: 0.5em;
}

.contact-card h3 {
    font-size: 1.4em;
    margin-bottom: 0.5em;
}

.contact-card .contact-detail {
    font-size: 1.2em;
    font-weight: 600;
    color: var(--heading-color);
    margin-bottom: 0.5em;
}

.contact-card a {
    color: var(--heading-color);
}

.contact-card a:hover {
    color: var(--primary-color);
}

.contact-form-container {
    background-color: var(--card-bg-color);
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 4px 15px var(--card-shadow-color);
}

.contact-form-container h3 {
    text-align: center;
    margin-bottom: 1.5em;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1em;
    font-family: 'Roboto', sans-serif;
    background-color: var(--form-bg-color);
    color: var(--text-color);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--form-focus-shadow);
}

.form-group textarea {
    resize: vertical;
}

.form-message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    display: none;
}

.form-message.success {
    background-color: #D4EDDA;
    color: #155724;
    border: 1px solid #C3E6CB;
}

.form-message.error {
    background-color: #F8D7DA;
    color: #721C24;
    border: 1px solid #F5C6CB;
}

.service-area-map {
    background-color: var(--card-bg-color);
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 15px var(--card-shadow-color);
}

.service-area-map h3 {
    margin-bottom: 1em;
}

.service-area-map iframe {
    border-radius: 8px;
    margin-bottom: 1em;
}

/* --- Footer --- */
.site-footer {
    background-color: var(--footer-bg-color);
    color: var(--footer-text-color);
    padding: 60px 0 30px;
    font-size: 0.95em;
}

.site-footer .footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 30px;
    margin-bottom: 40px;
}

.site-footer .footer-brand,
.site-footer .footer-links,
.site-footer .footer-contact {
    flex: 1;
    min-width: 250px;
}

.site-footer h4 {
    color: var(--footer-heading-color);
    margin-bottom: 1.2em;
    font-size: 1.3em;
}

.site-footer p {
    margin-bottom: 0.8em;
}

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

.site-footer ul li {
    margin-bottom: 0.5em;
}

.site-footer ul li a {
    color: var(--footer-text-color);
    transition: color 0.3s ease;
}

.site-footer ul li a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.footer-contact i {
    margin-right: 8px;
    color: var(--secondary-color);
}

.site-footer .copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* --- Calculator Styles --- */
.calculator-container {
    max-width: 300px;
    margin: 2rem auto;
    padding: 20px;
    border: 1px solid var(--border-color);
}

.calculator-display-input {
    width: 100%;
    padding: 15px;
    font-size: 1.5em;
    text-align: right;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-color);
    color: var(--text-color);
    box-sizing: border-box;
    margin-bottom: 10px;
}

.calculator-keys-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
}

.calculator-keys-grid button {
    padding: 15px;
    font-size: 1.2em;
    font-weight: 600;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    background-color: var(--calc-key-bg);
    color: var(--text-color);
    transition: background-color 0.2s;
}

.calculator-keys-grid button:hover {
    background-color: var(--calc-key-hover-bg);
}

.calculator-operator {
    background-color: var(--calc-op-key-bg);
}

.calculator-operator:hover {
    background-color: var(--calc-op-key-hover-bg);
}

.calculator-equals-button {
    background-color: var(--calc-eq-key-bg) !important;
    color: var(--clr-white) !important;
}

.calculator-equals-button:hover {
    background-color: var(--calc-eq-key-hover-bg) !important;
}

.calculator-clear-button {
    grid-column: 4;
    background-color: var(--calc-clear-key-bg) !important;
    color: var(--clr-white) !important;
}

.calculator-clear-button:hover {
    background-color: var(--calc-clear-key-hover-bg) !important;
}


/* --- Mobile Responsiveness --- */
@media (max-width: 900px) {
    h1 { font-size: 2.5em; }
    h2 { font-size: 1.8em; }

    .site-header .container {
        flex-direction: row;
        justify-content: space-between;
    }

    .main-nav .nav-links {
        flex-direction: column;
        position: absolute;
        top: 0;
        right: -100%;
        background-color: var(--card-bg-color);
        width: 70%;
        height: 100vh;
        padding-top: 80px;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease-in-out, background-color 0.3s ease;
        z-index: 999;
        align-items: flex-start;
        padding-left: 20px;
    }

    .main-nav .nav-links.nav-open {
        right: 0;
    }

    .main-nav .nav-links li {
        margin: 15px 0;
    }

    .nav-toggle {
        display: block;
    }

    .hero-section .container {
        flex-direction: column;
    }
    .hero-content {
        order: 2;
    }
    .hero-image-placeholder {
        order: 1;
        margin-bottom: 20px;
    }

    .services-overview .service-cards-grid,
    .how-it-works .steps-grid,
    .testimonials-section .testimonial-carousel,
    .pricing-flex-container,
    .contact-info-grid,
    .footer-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .pricing-card, .service-card, .step-card, .testimonial-card, .contact-card, .service-category-block, .contact-form-container, .service-area-map {
        padding: 25px;
    }

    .about-us-page .about-content {
        flex-direction: column;
        gap: 30px;
    }
    .about-image {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

    .site-footer .footer-brand,
    .site-footer .footer-links,
    .site-footer .footer-contact {
        text-align: center;
        min-width: unset;
    }
}

@media (max-width: 500px) {
    .hero-content h1 {
        font-size: 2em;
    }
    .hero-content .sub-headline {
        font-size: 1.1em;
    }
    .button.large-button {
        font-size: 1em;
        padding: 12px 24px;
    }
    .site-logo {
        font-size: 1.5em;
    }
    .main-nav .nav-links {
        width: 80%;
    }
}