/* ============================================================================
   BASIC.HAIR - Premium Minimalist Hair Care Website
   Color Palette & Design System
   ============================================================================ */

:root {
    /* Primary Colors */
    --color-ivory: #F6F1E7;
    --color-cloud: #FFF5F6;

    /* Eco-Conscious Palette */
    --color-moss-light: #F2F5F0;
    --color-moss-mist: #D5DDD2;
    --color-moss-medium: #9FAE9B;
    --color-moss-dark: #4C5C4E;
    --color-moss-black: #1B211C;

    /* Modern Minimalist - Salty Pink */
    --color-pink-light: #F8D4C1;
    --color-pink-pale: #F0C4C2;
    --color-pink-medium: #D58C89;
    --color-pink-deep: #AE7F8A;
    --color-pink-muted: #9C8C85;

    /* Clinical Authority - Sapphire */
    --color-blue-pale: #EDEDEE;
    --color-blue-light: #D6E0EA;
    --color-blue-medium: #72A6B7;
    --color-blue-dark: #18617F;
    --color-blue-deep: #092846;

    /* Typography */
    --font-serif: 'Cormorant Garamond', serif;
    --font-sans: 'DM Sans', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Transitions */
    --transition-fast: 0.2s ease-in-out;
    --transition-base: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* ============================================================================
   RESET & BASE STYLES
   ============================================================================ */

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

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-ivory);
    color: var(--color-moss-black);
    line-height: 1.6;
    overflow-x: hidden;
    letter-spacing: 0.3px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
}

h2 {
    font-size: clamp(1.8rem, 5vw, 3rem);
    margin-bottom: var(--spacing-lg);
    color: var(--color-moss-black);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

p {
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
    line-height: 1.8;
}

a {
    color: var(--color-blue-dark);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-pink-medium);
}

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

/* ============================================================================
   NAVIGATION
   ============================================================================ */

.navbar {
    position: sticky;
    top: 0;
    background-color: var(--color-ivory);
    border-bottom: 1px solid var(--color-moss-light);
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: rgba(246, 241, 231, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    flex-shrink: 0;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-moss-black);
    letter-spacing: -1px;
}

.logo:hover {
    color: var(--color-blue-dark);
}

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

.nav-link {
    font-size: 0.95rem;
    color: var(--color-moss-dark);
    font-weight: 500;
    position: relative;
    transition: color var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-pink-medium);
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--color-blue-dark);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 6px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--color-moss-black);
    border-radius: 2px;
    transition: all var(--transition-base);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: var(--spacing-md);
        background-color: var(--color-ivory);
        padding: var(--spacing-lg);
        border-bottom: 1px solid var(--color-moss-light);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
}

/* ============================================================================
   HERO SECTION
   ============================================================================ */

.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-ivory) 0%, var(--color-cloud) 100%);
}

#canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.6;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 600px;
    padding: 0 var(--spacing-lg);
}

.hero-title {
    color: var(--color-moss-black);
    margin-bottom: var(--spacing-md);
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.2s forwards;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-moss-dark);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.4s forwards;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-moss-medium);
    margin-bottom: var(--spacing-2xl);
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.6s forwards;
}

.cta-primary {
    padding: 1rem 2.5rem;
    background-color: var(--color-blue-dark);
    color: white;
    border: none;
    border-radius: 50px;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 10px 30px rgba(9, 40, 70, 0.2);
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.8s forwards;
}

.cta-primary:hover {
    background-color: var(--color-pink-medium);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(213, 140, 137, 0.3);
}

.cta-secondary {
    padding: 0.75rem 2rem;
    background-color: var(--color-pink-light);
    color: var(--color-moss-black);
    border: 2px solid var(--color-pink-medium);
    border-radius: 50px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.cta-secondary:hover {
    background-color: var(--color-pink-medium);
    color: white;
    transform: translateY(-2px);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    opacity: 0.7;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    font-size: 0.9rem;
    color: var(--color-moss-dark);
    display: block;
    text-align: center;
}

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

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

/* ============================================================================
   VALUE PROPOSITIONS
   ============================================================================ */

.value-props {
    padding: var(--spacing-3xl) 0;
    background-color: white;
}

.props-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
}

.prop-card {
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-moss-light) 0%, var(--color-blue-pale) 100%);
    border-radius: 8px;
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.prop-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.prop-card h3 {
    color: var(--color-blue-dark);
    margin-bottom: var(--spacing-md);
}

.prop-card p {
    color: var(--color-moss-dark);
    font-size: 0.95rem;
}

/* ============================================================================
   FEATURED CONTENT
   ============================================================================ */

.featured-content {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-ivory);
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
}

.content-card {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--spacing-xl);
    color: white;
    cursor: pointer;
    transition: all var(--transition-slow);
    text-decoration: none;
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-moss-dark), var(--color-blue-dark));
    z-index: 1;
    opacity: 0.8;
    transition: opacity var(--transition-base);
}

.content-card.anatomy::before {
    background: linear-gradient(135deg, var(--color-blue-dark), var(--color-blue-medium));
}

.content-card.routines::before {
    background: linear-gradient(135deg, var(--color-pink-medium), var(--color-pink-deep));
}

.content-card.ingredients::before {
    background: linear-gradient(135deg, var(--color-moss-dark), var(--color-moss-medium));
}

.content-card.reviews::before {
    background: linear-gradient(135deg, var(--color-blue-medium), var(--color-moss-dark));
}

.content-card:hover::before {
    opacity: 0.95;
}

.content-card h3 {
    position: relative;
    z-index: 2;
    margin-bottom: var(--spacing-sm);
    font-size: 1.8rem;
}

.content-card p {
    position: relative;
    z-index: 2;
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

.content-card .arrow {
    position: relative;
    z-index: 2;
    font-size: 1.5rem;
    transition: transform var(--transition-base);
}

.content-card:hover .arrow {
    transform: translateX(10px);
}

/* ============================================================================
   EDUCATION SECTION
   ============================================================================ */

.education-section {
    padding: var(--spacing-3xl) 0;
    background-color: white;
}

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

.edu-card {
    padding: var(--spacing-xl);
    background-color: var(--color-moss-light);
    border-radius: 8px;
    border-left: 4px solid var(--color-blue-dark);
}

.edu-card h3 {
    color: var(--color-blue-dark);
    margin-bottom: var(--spacing-md);
}

.edu-card p {
    color: var(--color-moss-dark);
    font-size: 0.95rem;
}

.edu-card strong {
    color: var(--color-blue-dark);
    font-weight: 600;
}

/* ============================================================================
   DIAGNOSTIC SECTION
   ============================================================================ */

.diagnostic-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-blue-pale) 0%, var(--color-moss-light) 100%);
}

.diagnostic-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.diagnostic-card {
    padding: var(--spacing-2xl);
    background-color: white;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.diagnostic-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.diagnostic-card h3 {
    color: var(--color-blue-dark);
}

.diagnostic-card p {
    color: var(--color-moss-dark);
    margin-bottom: var(--spacing-lg);
}

/* ============================================================================
   TRENDS SECTION
   ============================================================================ */

.trends-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-ivory);
}

.trends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
}

.trend-item {
    padding: var(--spacing-xl);
    background-color: white;
    border-radius: 8px;
    border-top: 3px solid var(--color-pink-medium);
}

.trend-item h3 {
    color: var(--color-pink-deep);
    margin-bottom: var(--spacing-md);
}

.trend-item p {
    color: var(--color-moss-dark);
    font-size: 0.95rem;
}

/* ============================================================================
   AFFILIATE SECTION
   ============================================================================ */

.affiliate-section {
    padding: var(--spacing-3xl) 0;
    background-color: white;
}

.affiliate-disclaimer {
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-moss-medium);
    margin-bottom: var(--spacing-2xl);
    font-style: italic;
}

.featured-products {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
}

.product-card {
    background-color: var(--color-ivory);
    border-radius: 8px;
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.product-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--color-blue-light), var(--color-moss-mist));
    border-bottom: 2px solid var(--color-pink-light);
}

.product-card h3 {
    padding: var(--spacing-lg) var(--spacing-lg) 0;
    color: var(--color-moss-black);
}

.product-card p {
    padding: 0 var(--spacing-lg);
    color: var(--color-moss-dark);
    font-size: 0.95rem;
}

.affiliate-link {
    display: inline-block;
    margin: var(--spacing-md) var(--spacing-lg);
    padding: 0.75rem 1.5rem;
    background-color: var(--color-blue-dark);
    color: white;
    border-radius: 50px;
    font-weight: 600;
    transition: all var(--transition-base);
    text-decoration: none;
}

.affiliate-link:hover {
    background-color: var(--color-pink-medium);
    transform: translateY(-2px);
}

/* ============================================================================
   NEWSLETTER SECTION
   ============================================================================ */

.newsletter-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-blue-dark), var(--color-blue-medium));
    color: white;
    text-align: center;
}

.newsletter-section h2 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.newsletter-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
    margin: 0 auto var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.newsletter-form input {
    flex: 1;
    min-width: 250px;
    padding: 1rem;
    border: none;
    border-radius: 50px;
    font-family: var(--font-sans);
    font-size: 1rem;
}

.newsletter-form button {
    padding: 1rem 2rem;
    background-color: var(--color-pink-medium);
    color: white;
    border: none;
    border-radius: 50px;
    font-family: var(--font-sans);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.newsletter-form button:hover {
    background-color: white;
    color: var(--color-blue-dark);
    transform: translateY(-2px);
}

.form-note {
    font-size: 0.85rem;
    opacity: 0.8;
}

/* ============================================================================
   TRUST SECTION
   ============================================================================ */

.trust-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-ivory);
}

.testimonials {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.testimonial {
    padding: var(--spacing-2xl);
    background-color: white;
    border-radius: 8px;
    border-left: 4px solid var(--color-pink-medium);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.testimonial p {
    color: var(--color-moss-dark);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

.testimonial-author {
    font-weight: 600;
    color: var(--color-blue-dark);
    font-style: normal;
    margin: 0;
}

/* ============================================================================
   FOOTER
   ============================================================================ */

.footer {
    background-color: var(--color-moss-black);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

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

.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-base);
}

.footer-section a:hover {
    color: var(--color-pink-light);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

.tagline {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-pink-light);
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .hero {
        height: auto;
        min-height: 100vh;
        padding: var(--spacing-xl) 0;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .newsletter-form {
        flex-direction: column;
    }

    .newsletter-form input,
    .newsletter-form button {
        width: 100%;
    }

    .featured-content {
        padding: var(--spacing-2xl) 0;
    }

    .content-grid,
    .props-grid,
    .education-grid,
    .diagnostic-container,
    .trends-grid,
    .featured-products,
    .testimonials {
        gap: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 13px;
    }

    .nav-brand {
        flex: 1;
    }

    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.2rem;
    }

    .cta-primary {
        width: 100%;
        margin-top: var(--spacing-md);
    }

    .hero-title {
        margin-bottom: var(--spacing-md);
    }

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

/* ============================================================================
   ACCESSIBILITY
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
button:focus,
a:focus,
input:focus {
    outline: 2px solid var(--color-blue-dark);
    outline-offset: 2px;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-ivory: #1a1a1a;
        --color-cloud: #222;
        --color-moss-black: #f5f5f5;
    }

    body {
        background-color: #1a1a1a;
        color: #f5f5f5;
    }

    .navbar {
        background-color: rgba(26, 26, 26, 0.95);
    }

    .logo {
        color: #f5f5f5;
    }

    .prop-card,
    .edu-card,
    .product-card,
    .testimonial,
    .diagnostic-card {
        background-color: #2a2a2a;
        color: #f5f5f5;
    }

    .content-card,
    .footer {
        background-color: #1a1a1a;
    }
}