/* ============================================
   AURA - Premium Natural Cosmetics
   World-class Minimalist Design System
   ============================================ */

:root {
    /* Color Palette - Refined */
    --primary: #3F5A1A;
    --primary-dark: #2D4A12;
    --secondary: #F5EDE0;
    --secondary-dark: #E8DCC8;
    --accent: #8FA977;
    --text-primary: #F5EDE0;
    --text-muted: rgba(245, 237, 224, 0.7);
    --text-subtle: rgba(245, 237, 224, 0.5);
    
    /* Typography Scale */
    --font-display: 'Pinyon Script', cursive;
    --font-sans: 'IBM Plex Mono', monospace;
    
    /* Spacing Scale */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;
    --space-2xl: 12rem;
    
    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --duration-fast: 0.2s;
    --duration-normal: 0.4s;
    --duration-slow: 0.8s;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Selection */
::selection {
    background: var(--accent);
    color: var(--primary);
}

/* Disclaimer Bar - Refined */
.disclaimer-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--secondary);
    color: var(--primary);
    text-align: center;
    padding: 0.625rem var(--space-md);
    font-size: 0.6875rem;
    z-index: 1001;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

/* Navigation - Minimalist */
nav {
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    width: 100%;
    top: 2rem;
    z-index: 100;
}

/* QR Code Button Override */
nav .qr-trigger-btn {
    color: var(--text-muted);
    margin-left: auto;
    padding: 0.5rem;
    opacity: 0.7;
    transition: all var(--duration-fast) var(--ease-out);
}

nav .qr-trigger-btn:hover {
    color: var(--text-primary);
    opacity: 1;
}

nav .qr-trigger-btn svg {
    width: 18px;
    height: 18px;
}

nav a.back {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color var(--duration-fast) var(--ease-out);
}

nav a.back:hover {
    color: var(--text-primary);
}

nav a.back svg {
    width: 16px;
    height: 16px;
    transition: transform var(--duration-fast) var(--ease-out);
}

nav a.back:hover svg {
    transform: translateX(-4px);
}

/* Main Content */
main {
    flex: 1;
    width: 100%;
}

/* ============================================
   HERO SECTION
   ============================================ */
header {
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    padding-top: calc(var(--space-xl) + 2rem);
    position: relative;
    overflow: hidden;
}

.header-logo {
    max-width: 600px;
    width: 100%;
    margin-top: -10vh;
    height: auto;
    margin-bottom: var(--space-lg);
    border-radius: 0;
    opacity: 0;
    animation: fadeInUp 1s var(--ease-out) 0.2s forwards;
}

header h1 {
    font-family: var(--font-sans);
    font-size: clamp(0.875rem, 2vw, 1.125rem);
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    font-weight: 400;
    max-width: 600px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    opacity: 0;
    animation: fadeInUp 1s var(--ease-out) 0.4s forwards;
}

header .author {
    font-size: 0.8125rem;
    display: block;
    margin-bottom: var(--space-md);
    color: var(--text-muted);
    letter-spacing: 0.05em;
    opacity: 0;
    animation: fadeInUp 1s var(--ease-out) 0.6s forwards;
}

/* Social Links - Header */
.header-social {
    margin-top: var(--space-lg);
    opacity: 0;
    animation: fadeInUp 1s var(--ease-out) 0.8s forwards;
}

.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-links a {
    color: var(--text-muted);
    transition: all var(--duration-fast) var(--ease-out);
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-links a:hover {
    color: var(--text-primary);
    transform: translateY(-2px);
}

.social-links svg {
    width: 20px;
    height: 20px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-muted);
    opacity: 0;
    animation: fadeIn 1s var(--ease-out) 1.2s forwards;
}

.scroll-indicator svg {
    width: 28px;
    height: 28px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

@keyframes fadeIn {
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   PRODUCT SECTIONS
   ============================================ */
.product-section {
    min-height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg) var(--space-lg) var(--space-xl);
    position: relative;
}

.product-section:first-of-type {
    padding-top: var(--space-xl);
}

.product-content {
    max-width: 1400px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

/* Alternate layout */
.product-section:nth-child(odd) .product-content {
    direction: rtl;
}

.product-section:nth-child(odd) .product-info,
.product-section:nth-child(odd) .product-image {
    direction: ltr;
}

.product-section:nth-child(odd) .product-info {
    text-align: right;
}

.product-section:nth-child(odd) .product-info p {
    margin-left: auto;
}

.product-section:nth-child(odd) .product-btn {
    margin-left: auto;
}

/* Product Image */
.product-image {
    position: relative;
    width: 100%;
    max-width: 480px;
    aspect-ratio: 4/5;
    overflow: hidden;
    border-radius: 20px;
    background-color: var(--primary);
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(245, 237, 224, 0.08);
}

.product-image::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    background: linear-gradient(180deg, transparent 70%, rgba(0,0,0,0.1) 100%);
    pointer-events: none;
    z-index: 1;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--duration-slow) var(--ease-out);
}

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

/* Product Info */
.product-info {
    padding: var(--space-md) 0;
}

.product-info h2 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    font-weight: 400;
    line-height: 1.1;
}

.product-info p {
    font-size: 0.9375rem;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
    max-width: 440px;
    line-height: 1.8;
}

/* Product Button - Refined */
.product-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 1rem 2rem;
    border: 1px solid var(--text-muted);
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out);
    position: relative;
    overflow: hidden;
}

.product-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--secondary);
    transform: translateY(100%);
    transition: transform var(--duration-normal) var(--ease-out);
}

.product-btn span {
    position: relative;
    z-index: 1;
}

.product-btn:hover {
    border-color: var(--secondary);
    color: var(--primary);
}

.product-btn:hover::before {
    transform: translateY(0);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 1px;
    background: var(--text-subtle);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

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

.contact-info a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    letter-spacing: 0.02em;
    transition: color var(--duration-fast) var(--ease-out);
}

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

.copyright {
    color: var(--text-subtle);
    font-size: 0.6875rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* ============================================
   MODAL - Premium Feel
   ============================================ */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn var(--duration-fast) var(--ease-out);
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.modal-content {
    position: relative;
    background-color: var(--primary);
    border: 1px solid rgba(245, 237, 224, 0.15);
    border-radius: 24px;
    padding: var(--space-lg) var(--space-lg);
    max-width: 580px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    z-index: 2001;
    animation: modalSlideUp var(--duration-normal) var(--ease-out);
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--duration-fast) var(--ease-out);
    border-radius: 50%;
}

.modal-close:hover {
    color: var(--text-primary);
    background: rgba(245, 237, 224, 0.1);
}

.modal-content h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    padding-right: var(--space-lg);
    font-weight: 400;
}

.modal-intro {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Ingredients List */
.ingredients-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.ingredients-list li {
    padding: var(--space-md);
    background-color: rgba(245, 237, 224, 0.04);
    border-radius: 12px;
    line-height: 1.7;
    font-size: 0.875rem;
    transition: all var(--duration-fast) var(--ease-out);
    border: 1px solid transparent;
}

.ingredients-list li:hover {
    background-color: rgba(245, 237, 224, 0.08);
    border-color: rgba(245, 237, 224, 0.1);
}

.ingredients-list li strong {
    color: var(--secondary);
    display: block;
    margin-bottom: 0.375rem;
    font-size: 0.9375rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.ingredients-list li em {
    color: var(--text-subtle);
    font-style: italic;
    display: block;
    text-align: center;
    padding: var(--space-xs) 0;
}

/* Modal Scrollbar */
.modal-content::-webkit-scrollbar {
    width: 6px;
}

.modal-content::-webkit-scrollbar-track {
    background: transparent;
}

.modal-content::-webkit-scrollbar-thumb {
    background: rgba(245, 237, 224, 0.2);
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: rgba(245, 237, 224, 0.3);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    :root {
        --space-lg: 3rem;
        --space-xl: 5rem;
    }
    
    .product-content {
        gap: var(--space-lg);
    }
}

@media (max-width: 768px) {
    :root {
        --space-md: 1.5rem;
        --space-lg: 2rem;
        --space-xl: 4rem;
    }
    
    nav {
        padding: var(--space-sm) var(--space-md);
        top: 2.5rem;
    }
    
    header {
        padding: var(--space-xl) 0;
        padding-bottom: var(--space-lg);
    }
    
    .header-logo {
        max-width: 100%;
        width: 100%;
        margin-bottom: var(--space-md);
        margin-top: 0;
    }
    
    header h1,
    header .author,
    .header-social {
        padding: 0 var(--space-md);
    }
    
    header h1 {
        font-size: 0.75rem;
        letter-spacing: 0.15em;
    }
    
    .scroll-indicator {
        bottom: var(--space-md);
    }
    
    .product-section {
        padding: var(--space-xl) var(--space-md);
        min-height: auto;
    }
    
    .product-section::before {
        height: 40px;
    }
    
    .product-content {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    /* Reset alternate layout for mobile */
    .product-section:nth-child(odd) .product-content {
        direction: ltr;
    }
    
    .product-section:nth-child(odd) .product-info {
        text-align: left;
    }
    
    .product-section:nth-child(odd) .product-info p,
    .product-section:nth-child(odd) .product-btn {
        margin-left: 0;
    }
    
    .product-image {
        max-width: 100%;
    }
    
    .product-info h2 {
        font-size: 2.5rem;
    }
    
    .product-info p {
        font-size: 0.875rem;
    }
    
    .product-image {
        aspect-ratio: 1/1;
    }
    
    footer {
        padding: var(--space-lg) var(--space-md);
    }
    
    /* Modal as Bottom Drawer on Mobile */
    .modal.active {
        align-items: flex-end;
    }
    
    .modal-content {
        padding: var(--space-md);
        padding-top: var(--space-sm);
        padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom));
        border-radius: 24px 24px 0 0;
        width: 100%;
        max-width: 100%;
        max-height: 85vh;
        animation: drawerSlideUp var(--duration-normal) var(--ease-out);
    }
    
    .modal-content::before {
        content: '';
        display: block;
        width: 40px;
        height: 4px;
        background: var(--text-subtle);
        border-radius: 2px;
        margin: 0 auto var(--space-sm);
    }
    
    @keyframes drawerSlideUp {
        from {
            opacity: 0;
            transform: translateY(100%);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .modal-close {
        top: var(--space-sm);
        right: var(--space-sm);
    }
    
    .modal-content h2 {
        font-size: 1.75rem;
        margin-top: var(--space-xs);
    }
    
    .ingredients-list li {
        padding: var(--space-sm);
        font-size: 0.8125rem;
    }
    
    .ingredients-list li strong {
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    .header-logo {
        max-width: 100%;
    }
    
    .social-links {
        gap: var(--space-sm);
    }
    
    .product-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --text-muted: rgba(245, 237, 224, 0.85);
        --text-subtle: rgba(245, 237, 224, 0.7);
    }
    
    .product-btn {
        border-width: 2px;
    }
}