/* ========================================
   Microplastix Innovation - Premium Environmental Tech Website
   Soft, Clean, Futuristic Design System
   ======================================== */

/* ===== CSS VARIABLES ===== */
:root {
    /* Soft Color Palette */
    --color-white: #FFFFFF;
    --color-soft-aqua: #F3FAFD;
    --color-light-aqua: #E8F6FB;
    --color-aqua: #4ECDC4;
    --color-teal: #44A08D;
    --color-ocean-blue: #3D7EA6;
    --color-deep-blue: #2B5876;
    
    /* Neutrals */
    --color-light-grey: #F8F9FA;
    --color-grey-100: #E9ECEF;
    --color-grey-200: #DEE2E6;
    --color-grey-300: #CED4DA;
    --color-grey-400: #ADB5BD;
    --color-grey-600: #6C757D;
    --color-grey-800: #343A40;
    --color-dark: #1A1D23;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 12px 48px rgba(78, 205, 196, 0.15);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
}

/* ===== RESET & BASE STYLES ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background: var(--color-white);
    color: var(--color-grey-800);
    line-height: 1.6;
    font-weight: 400;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-grey-600);
}

.lead-text {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    font-weight: 300;
    line-height: 1.7;
    color: var(--color-grey-600);
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-aqua) 0%, var(--color-ocean-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== CONTAINER & LAYOUT ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

section {
    padding: var(--spacing-xxl) 0;
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-grey-100);
    transition: var(--transition-normal);
}

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

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-dark);
}

.logo-icon {
    font-size: 1.75rem;
    color: var(--color-aqua);
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-img {
    height: 60px;
    width: auto;
    display: block;
}

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

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-grey-600);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-aqua), var(--color-ocean-blue));
    transition: var(--transition-normal);
}

.nav-link:hover, .nav-link.active {
    color: var(--color-aqua);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--color-dark);
    transition: var(--transition-fast);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-aqua) 0%, var(--color-teal) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

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

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

.btn-secondary:hover {
    background: var(--color-soft-aqua);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.0625rem;
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-soft-aqua) 100%);
    padding-top: 80px;
    overflow: hidden;
    z-index: 1;
}

.particle-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    font-weight: 300;
    color: var(--color-grey-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    z-index: 2;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.scroll-indicator.hidden {
    opacity: 0;
    visibility: hidden;
}

.scroll-text {
    font-size: 0.875rem;
    color: var(--color-grey-400);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-arrow {
    width: 2px;
    height: 30px;
    background: linear-gradient(180deg, transparent, var(--color-aqua));
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0; transform: translateY(-10px); }
    50% { opacity: 1; transform: translateY(0); }
}

/* ===== SECTIONS ===== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xxl);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-grey-600);
    font-weight: 300;
}

/* ===== HIGHLIGHTS GRID ===== */
.highlights {
    background: var(--color-white);
    padding: var(--spacing-xxl) 0;
    padding-top: calc(var(--spacing-xxl) + 100px);
    position: relative;
    z-index: 10;
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.highlight-card {
    background: var(--color-soft-aqua);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    border: 1px solid rgba(78, 205, 196, 0.1);
}

.highlight-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-aqua);
}

.highlight-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-aqua) 0%, var(--color-teal) 100%);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.highlight-icon svg {
    width: 30px;
    height: 30px;
}

.highlight-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
}

.highlight-card p {
    font-size: 0.9375rem;
    color: var(--color-grey-600);
    line-height: 1.7;
}

/* ===== VIDEO SECTION ===== */
.video-section {
    background: var(--color-white);
    padding: var(--spacing-xxl) 0;
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* ===== PROBLEM SECTION ===== */
.problem-section {
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-light-grey) 100%);
    padding: var(--spacing-xxl) 0;
}

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

.problem-text h2 {
    margin-bottom: var(--spacing-lg);
}

.problem-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-aqua) 0%, var(--color-ocean-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-grey-600);
    font-weight: 500;
}

.problem-visual {
    position: relative;
    min-height: 400px;
}

.problem-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    object-fit: cover;
}

.floating-particles-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.floating-particle {
    position: absolute;
    width: 20px;
    height: 20px;
    background: radial-gradient(circle, var(--color-aqua), transparent);
    border-radius: 50%;
    opacity: 0.6;
    animation: float linear infinite;
}

.floating-particle:nth-child(1) { width: 15px; height: 15px; top: 20%; left: 10%; }
.floating-particle:nth-child(2) { width: 25px; height: 25px; top: 40%; left: 60%; }
.floating-particle:nth-child(3) { width: 18px; height: 18px; top: 60%; left: 30%; }
.floating-particle:nth-child(4) { width: 22px; height: 22px; top: 80%; left: 70%; }
.floating-particle:nth-child(5) { width: 16px; height: 16px; top: 30%; left: 85%; }

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
    100% { transform: translate(0, 0) scale(1); }
}

/* ===== CTA SECTION ===== */
.cta-section {
    background: linear-gradient(135deg, var(--color-aqua) 0%, var(--color-teal) 100%);
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

.cta-content h2 {
    color: var(--color-white);
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-section .btn-primary {
    background: var(--color-white);
    color: var(--color-aqua);
}

.cta-section .btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.2);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--color-dark);
    color: var(--color-grey-300);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    color: var(--color-white);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-logo-img {
    height: 40px;
    width: auto;
    display: block;
}

.footer-tagline {
    color: var(--color-grey-400);
    font-size: 0.9375rem;
    line-height: 1.7;
}

.footer-section h4 {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-grey-400);
    font-size: 0.9375rem;
}

.footer-links a:hover {
    color: var(--color-aqua);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--color-grey-400);
    font-size: 0.875rem;
}

.footer-particles {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-aqua), transparent);
    opacity: 0.3;
}

/* ===== PAGE HEADER ===== */
.page-header {
    padding-top: 140px;
    padding-bottom: var(--spacing-xxl);
    text-align: center;
    background: linear-gradient(180deg, var(--color-soft-aqua) 0%, var(--color-white) 100%);
}

.page-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--spacing-md);
}

.page-subtitle {
    font-size: clamp(1rem, 2vw, 1.375rem);
    color: var(--color-grey-600);
    font-weight: 300;
}

/* ===== ANIMATIONS ===== */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

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

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    animation: fadeInLeft 0.8s ease forwards;
}

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

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    animation: fadeInRight 0.8s ease forwards;
}

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-xl);
        box-shadow: var(--shadow-lg);
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .problem-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    section {
        padding: var(--spacing-xl) 0;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .highlights-grid {
        grid-template-columns: 1fr;
    }
    
    .problem-stats {
        grid-template-columns: 1fr;
    }
}