/* ---------------------------------- */
/*          CSS Variables             */
/* ---------------------------------- */

:root {
    /* Split-Complementary Color Palette */
    --primary-color: #0077b6; /* Main Blue */
    --accent-color-1: #ffb703; /* Yellow-Orange */
    --accent-color-2: #fb8500; /* Orange */
    
    /* Neutral & Text Colors */
    --bg-color: #f0f4f8; /* Light blue-gray background */
    --surface-color: #ffffff;
    --text-color-dark: #023047;
    --text-color-light: #ffffff;
    --text-color-muted: #576a75;
    
    /* Glassmorphism Effect */
    --glass-bg: rgba(255, 255, 255, 0.3);
    --glass-border-color: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
    --glass-blur: 10px;

    /* Typography */
    --font-family-headings: 'Manrope', sans-serif;
    --font-family-body: 'Rubik', sans-serif;
    
    /* Adaptive Typography using clamp() */
    --font-size-sm: clamp(0.8rem, 0.17vw + 0.76rem, 0.96rem);
    --font-size-base: clamp(1rem, 0.34vw + 0.91rem, 1.33rem);
    --font-size-lg: clamp(1.25rem, 0.61vw + 1.1rem, 1.78rem);
    --font-size-xl: clamp(1.56rem, 1vw + 1.31rem, 2.37rem);
    --font-size-xxl: clamp(1.95rem, 1.56vw + 1.56rem, 3.16rem);
    --font-size-xxxl: clamp(2.44rem, 2.38vw + 1.85rem, 4.21rem);
    
    /* Spacing & Layout */
    --spacing-unit: 1rem;
    --header-height: 80px;
    --container-width: 1200px;
    --container-padding: 1.5rem;
    
    /* UI Elements */
    --border-radius: 16px;
    --transition-speed: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* ---------------------------------- */
/*          Global Styles             */
/* ---------------------------------- */

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

html {
    scroll-behavior: smooth;
    font-size: 100%;
}

body {
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-color-dark);
    background-color: var(--bg-color);
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: var(--font-family-headings);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    color: var(--text-color-dark);
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

h1 { font-size: var(--font-size-xxxl); }
h2 { font-size: var(--font-size-xxl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-unit);
    max-width: 75ch;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--accent-color-2);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

section {
    padding: calc(var(--spacing-unit) * 4) var(--container-padding);
}

.container {
    max-width: var(--container-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.section-title {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 1);
}

.section-subtitle {
    text-align: center;
    max-width: 800px;
    margin: 0 auto calc(var(--spacing-unit) * 3) auto;
    color: var(--text-color-muted);
}

/* ---------------------------------- */
/*    Reusable Components & Buttons   */
/* ---------------------------------- */

.button {
    display: inline-block;
    padding: 12px 28px;
    border: 2px solid transparent;
    border-radius: 50px;
    font-family: var(--font-family-headings);
    font-weight: 700;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed);
    transform: scale(1);
}

.button:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.button.primary-button {
    background-color: var(--primary-color);
    color: var(--text-color-light);
}

.button.primary-button:hover {
    background-color: #005f8e; /* Darker primary */
}

.button.secondary-button {
    background-color: var(--accent-color-1);
    color: var(--text-color-dark);
}

.button.secondary-button:hover {
    background-color: #d99c02; /* Darker accent */
}

.glass-card {
    background: var(--glass-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border-color);
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    padding: calc(var(--spacing-unit) * 2);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(31, 38, 135, 0.15);
}

.card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    display: flex;
    flex-direction: column;
    text-align: center;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 20px rgba(0,0,0,0.15);
}

.card-image {
    width: 100%;
    height: 250px; /* Fixed height for consistency */
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Ensures image covers the area without distortion */
    transition: transform 0.4s ease-out;
}

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

.card-content {
    padding: calc(var(--spacing-unit) * 1.5);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.card-content h3 {
    margin-bottom: var(--spacing-unit);
}

/* ---------------------------------- */
/*        Header & Navigation         */
/* ---------------------------------- */

.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-unit) 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    transition: background-color var(--transition-speed), padding var(--transition-speed);
}

.main-header.scrolled {
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo {
    font-family: var(--font-family-headings);
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--text-color-dark);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: calc(var(--spacing-unit) * 2);
}

.nav-links a {
    color: var(--text-color-dark);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

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

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

.burger-menu {
    display: none;
    cursor: pointer;
    background: transparent;
    border: none;
    padding: 0;
    z-index: 1001;
}

.burger-menu span {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px 0;
    background-color: var(--text-color-dark);
    transition: all var(--transition-speed);
}

/* ---------------------------------- */
/*           Hero Section             */
/* ---------------------------------- */

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-color-light);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-content {
    max-width: 900px;
}

.hero-content h1 {
    color: var(--text-color-light);
    margin-bottom: var(--spacing-unit);
}

.hero-content p {
    font-size: var(--font-size-lg);
    margin-bottom: calc(var(--spacing-unit) * 2);
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

/* ---------------------------------- */
/*         Statistics Section         */
/* ---------------------------------- */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-unit) * 1.5;
}

.stat-number {
    font-family: var(--font-family-headings);
    font-size: var(--font-size-xxl);
    font-weight: 800;
    color: var(--primary-color);
    display: block;
    margin: 1rem 0;
}

.stat-label {
    font-size: var(--font-size-base);
    color: var(--text-color-muted);
}

/* ---------------------------------- */
/*          Features Section          */
/* ---------------------------------- */

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
}

/* ---------------------------------- */
/*       Sustainability Section       */
/* ---------------------------------- */

.sustainability-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(var(--spacing-unit) * 3);
    align-items: center;
}

.sustainability-content .image-container {
    border-radius: var(--border-radius);
    overflow: hidden;
}

/* ---------------------------------- */
/*       Community (Slider) Section    */
/* ---------------------------------- */

.testimonial-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

.slider-wrapper {
    display: flex;
    transition: transform var(--transition-speed);
}

.slide {
    flex: 0 0 100%;
}

.slide blockquote {
    border: none;
    padding: calc(var(--spacing-unit) * 2);
    text-align: center;
}

.slide blockquote p {
    font-size: var(--font-size-lg);
    font-style: italic;
    margin-bottom: var(--spacing-unit);
}

.slide blockquote footer {
    font-weight: 700;
    color: var(--primary-color);
}

.slider-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    transform: translateY(-50%);
    pointer-events: none;
}

.slider-controls button {
    pointer-events: all;
    background: rgba(255, 255, 255, 0.7);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-speed);
    margin: 0 1rem;
}

.slider-controls button:hover {
    background: var(--primary-color);
    color: var(--text-color-light);
}

/* ---------------------------------- */
/*         Resources Section          */
/* ---------------------------------- */

.resources-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
}

.resource-item {
    display: block;
    color: var(--text-color-dark);
}

.resource-link {
    display: inline-block;
    margin-top: auto;
    padding-top: var(--spacing-unit);
    font-weight: 700;
    color: var(--primary-color);
}
.resource-link:after {
    content: ' →';
}

/* ---------------------------------- */
/*            FAQ Section             */
/* ---------------------------------- */

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--surface-color);
    margin-bottom: var(--spacing-unit);
    border-radius: calc(var(--border-radius) / 2);
    border: 1px solid #e0e0e0;
    overflow: hidden;
}

.faq-item summary {
    font-size: var(--font-size-lg);
    font-weight: 700;
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 2rem;
    transition: transform var(--transition-speed);
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item p {
    padding: 0 calc(var(--spacing-unit) * 1.5) var(--spacing-unit);
    margin: 0;
}

/* ---------------------------------- */
/*          Contact Section           */
/* ---------------------------------- */

.contact-form-wrapper {
    max-width: 700px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-unit-sm);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px;
    border-radius: 8px;
    border: 1px solid #ccc;
    background: #f9f9f9;
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 119, 182, 0.2);
}

.full-width {
    width: 100%;
}

/* ---------------------------------- */
/*              Footer                */
/* ---------------------------------- */

.main-footer {
    background-color: var(--text-color-dark);
    color: var(--text-color-light);
    padding: calc(var(--spacing-unit) * 3) 0 calc(var(--spacing-unit) * 1) 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.footer-column h4 {
    color: var(--text-color-light);
    margin-bottom: var(--spacing-unit);
}

.footer-column p,
.footer-column ul {
    color: #adb5bd;
}

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

.footer-column ul a {
    color: #adb5bd;
    transition: color var(--transition-speed);
}

.footer-column ul a:hover {
    color: var(--accent-color-1);
}

.footer-bottom {
    text-align: center;
    padding-top: calc(var(--spacing-unit) * 1.5);
    border-top: 1px solid var(--text-color-muted);
    font-size: var(--font-size-sm);
    color: #adb5bd;
}

/* ---------------------------------- */
/*       Specific Page Styles         */
/* ---------------------------------- */

.page-content {
    padding-top: calc(var(--header-height) + 40px);
    padding-bottom: 40px;
}

.success-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    background-color: var(--bg-color);
}

.success-page .card {
    max-width: 500px;
}

/* ---------------------------------- */
/*    Animations & Transitions        */
/* ---------------------------------- */

[data-scroll-animation] {
    opacity: 0;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-scroll-animation="fade-in"] {
    transform: translateY(20px);
}

[data-scroll-animation="fade-in-up"] {
    transform: translateY(40px);
}

[data-scroll-animation="fade-in-right"] {
    transform: translateX(-40px);
}

[data-scroll-animation="fade-in-left"] {
    transform: translateX(40px);
}

[data-scroll-animation="zoom-in"] {
    transform: scale(0.9);
}

[data-scroll-animation].is-visible {
    opacity: 1;
    transform: translate(0, 0) scale(1);
}

/* Page Transition (Barba.js) */
.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--primary-color);
    z-index: 9999;
    transform: translateY(100%);
}


/* ---------------------------------- */
/*        Responsive Design           */
/* ---------------------------------- */
@media (max-width: 992px) {
    .sustainability-content {
        grid-template-columns: 1fr;
    }
}


@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%; /* Start off-screen */
        width: 70%;
        height: 100vh;
        background-color: var(--surface-color);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-unit) * 2.5;
        transition: right 0.5s cubic-bezier(0.77, 0, 0.175, 1);
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    }
    
    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: var(--font-size-lg);
    }

    .burger-menu {
        display: block;
    }

    .main-header .button {
        display: none;
    }
    
    .hero-section {
        min-height: 80vh;
    }

    section {
        padding: calc(var(--spacing-unit) * 3) var(--container-padding);
    }
}