:root {
    --bg-dark: #101213;
    --bg-darker: #0a0b0c;
    --text-primary: #f2f2f2;
    --text-secondary: #9aa0a6;
    --accent: #e5b085; /* Warm aesthetic halogen glow */
    --accent-glow: rgba(229, 176, 133, 0.4);
    --font-main: 'Outfit', sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

/* Typography */
h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 400;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 300;
    margin-bottom: 2rem;
    letter-spacing: -0.01em;
}

p {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    font-weight: 300;
}

/* Animations */
@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(40px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.hidden {
    opacity: 0;
    transform: translateY(40px);
    transition: all 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.hidden.show {
    opacity: 1;
    transform: translateY(0);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 8%;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('hero.jpg'); /* Expected user background image */
    background-size: cover;
    background-position: center;
    z-index: -2;
    transform: scale(1.05); /* Slight scale to allow for a subtle zoom effect if desired later */
}

/* Ambient gradient overlay to ensure text readability but keep the warm vibe */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, #101213 0%, rgba(16, 18, 19, 0.7) 40%, rgba(16, 18, 19, 0) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 750px;
    z-index: 10;
}

.hero-content h1 {
    opacity: 0;
    animation: fadeInUp 1.2s cubic-bezier(0.2, 0.8, 0.2, 1) 0.3s forwards;
}

.hero-content p {
    opacity: 0;
    animation: fadeInUp 1.2s cubic-bezier(0.2, 0.8, 0.2, 1) 0.6s forwards;
    max-width: 550px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 50px;
    left: 8%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    opacity: 0;
    animation: fadeInUp 1s ease 1.2s forwards;
    z-index: 10;
}

.scroll-indicator span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    font-weight: 500;
}

.scroll-indicator .line {
    width: 1px;
    height: 60px;
    background-color: rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.scroll-indicator .line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--accent);
    animation: scrollLine 2.5s ease-in-out infinite;
}

@keyframes scrollLine {
    0% { top: -100%; }
    100% { top: 100%; }
}

/* Problem Section */
.problem-section {
    padding: 12rem 0;
    text-align: center;
    background: linear-gradient(180deg, transparent 0%, rgba(16, 18, 19, 1) 100%);
}

.quote {
    font-style: normal;
    font-weight: 400;
    color: var(--text-primary);
    max-width: 900px;
    margin: 0 auto 2.5rem auto;
}

.supporting-text {
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Science Section */
.science-section {
    padding: 10rem 0;
    background-color: var(--bg-darker);
}

.container-split {
    display: flex;
    gap: 6rem;
    align-items: center;
}

.text-content, .visual-content {
    flex: 1;
}

.feature-list {
    list-style: none;
    margin-top: 3rem;
}

.feature-list li {
    margin-bottom: 3.5rem;
    position: relative;
    padding-left: 2rem;
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

.feature-list strong {
    display: block;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 0.75rem;
}

.spectrogram-image-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.spectrogram-img {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s ease;
}

.spectrogram-img:hover {
    transform: scale(1.02);
}


/* Craft Section */
.craft-section {
    padding: 12rem 0 14rem 0;
    text-align: center;
}

.badge-grid {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    margin-top: 5rem;
    flex-wrap: wrap;
}

.badge {
    background: rgba(255, 255, 255, 0.02);
    padding: 2.5rem 2rem;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    width: 280px;
    backdrop-filter: blur(10px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.badge:hover {
    transform: translateY(-10px);
    border-color: rgba(229, 176, 133, 0.3);
    box-shadow: 0 15px 35px rgba(229, 176, 133, 0.05);
    background: rgba(255, 255, 255, 0.04);
}

.badge .icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 0 10px rgba(255,255,255,0.1));
}

.badge span:not(.icon) {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 900px) {
    .container-split { 
        flex-direction: column; 
        gap: 4rem;
    }
    .hero {
        padding: 0 5%;
    }
    .hero::after {
        background: linear-gradient(180deg, rgba(16, 18, 19, 0.5) 0%, #101213 100%);
    }
    .hero-bg { 
        background-position: 70% center; 
    }
    .scroll-indicator {
        left: 50%;
        transform: translateX(-50%);
    }
}

/* Pricing Section */
.pricing-section {
    padding: 10rem 0 12rem 0;
    background-color: var(--bg-dark);
}

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

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 3rem;
    margin-top: 5rem;
    align-items: center;
}

.pricing-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    overflow: hidden;
    position: relative;
    transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
}

.pricing-card:hover {
    transform: translateY(-10px);
    border-color: rgba(229, 176, 133, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.img-wrapper {
    width: 100%;
    height: 350px;
    overflow: hidden;
    background-color: #1a1c1e;
}

.product-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.pricing-content {
    padding: 3rem 2.5rem;
    display: flex;
    flex-direction: column;
    text-align: left;
}

.pricing-content h3 {
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.price {
    font-size: 2.5rem;
    color: var(--accent);
    font-weight: 300;
    margin-bottom: 2.5rem;
}

.specs {
    list-style: none;
    margin-bottom: 3.5rem;
    flex-grow: 1;
}

.specs li {
    margin-bottom: 1.2rem;
    position: relative;
    padding-left: 1.8rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.specs li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.interest-form {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-top: auto;
}

.email-input {
    width: 100%;
    padding: 1rem 1.2rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: all 0.3s ease;
}

.email-input::placeholder {
    color: var(--text-secondary);
}

.email-input:focus {
    border-color: rgba(229, 176, 133, 0.5); /* var(--accent) with opacity */
    background: rgba(0, 0, 0, 0.4);
}

.buy-btn {
    width: 100%;
    padding: 1.2rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: transparent;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
}

.buy-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
}

.primary-btn {
    background: var(--accent);
    color: #101213;
    border: none;
    font-weight: 500;
}

.primary-btn:hover {
    background: #f0c39f;
    border-color: transparent;
}

.featured {
    transform: scale(1.05);
    border-color: rgba(229, 176, 133, 0.2);
    box-shadow: 0 10px 40px rgba(0,0,0,0.4);
    z-index: 10;
}

.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.badge-popular {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--accent);
    color: #101213;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    z-index: 5;
}

@media (max-width: 900px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 450px;
        margin: 5rem auto;
    }
    .featured {
        transform: scale(1);
    }
    .featured:hover {
        transform: translateY(-10px);
    }
}

/* Back to Portfolio Navigation */
.back-to-portfolio {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0.8rem 8%;
    background: rgba(10, 11, 12, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.back-to-portfolio a {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    transition: opacity 0.3s ease;
}

.back-to-portfolio a:hover {
    opacity: 0.7;
}

/* Interest link (anchor styled as button) */
.interest-link {
    display: block;
    text-align: center;
    text-decoration: none;
    margin-top: auto;
}