/* ============================================
   LEAH KAT INSIGHTS — Design System & Styles
   ============================================ */

/* --- Custom Properties --- */
:root {
    /* Colors */
    --color-bg: #FAFAF8;
    --color-bg-alt: #F3F0EC;
    --color-bg-dark: #1A1A1A;
    --color-text: #1A1A1A;
    --color-text-light: #6B6B6B;
    --color-text-inverse: #FAFAF8;
    --color-accent: #C4956A;
    --color-accent-light: #D4AD87;
    --color-accent-dark: #A87B52;
    --color-border: #E5E2DD;
    --color-card: #FFFFFF;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;

    /* Layout */
    --max-width: 1200px;
    --nav-height: 72px;

    /* Transitions */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --transition-fast: 0.2s var(--ease-out);
    --transition-med: 0.4s var(--ease-out);
    --transition-slow: 0.6s var(--ease-out);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
}

/* --- Playfair Display Italic Stylistic Alternates --- */
.hero-accent,
.section-title em {
    font-feature-settings: "ss01" 1;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

/* --- Typography --- */
.section-eyebrow {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.section-title em {
    font-style: italic;
    color: var(--color-accent);
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg);
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: background var(--transition-med), box-shadow var(--transition-med);
}

.nav.scrolled {
    background: rgba(250, 250, 248, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 var(--color-border);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.nav-logo:hover {
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--color-text-light);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width var(--transition-med);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 22px;
    height: 1.5px;
    background: var(--color-text);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(250, 250, 248, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--space-lg);
    flex-direction: column;
    gap: var(--space-md);
    z-index: 999;
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-med), opacity var(--transition-med);
    border-bottom: 1px solid var(--color-border);
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
}

.mobile-link {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text);
    padding: var(--space-xs) 0;
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: var(--nav-height);
}

.hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
    width: 100%;
}

.hero-content {
    animation: fadeInUp 0.8s var(--ease-out) both;
}

.hero-eyebrow {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.hero-title {
    font-family: var(--font-serif);
    line-height: 1.1;
    margin-bottom: var(--space-md);
}

.hero-name {
    display: block;
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 500;
    color: var(--color-text);
}

.hero-accent {
    display: block;
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 400;
    font-style: italic;
    color: var(--color-accent);
}

.hero-tagline {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
    max-width: 440px;
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    animation: fadeInUp 0.8s var(--ease-out) 0.2s both;
}

.hero-image-frame {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 3 / 4;
    max-height: 580px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
}

.hero-image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.hero-image-accent {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 120px;
    height: 120px;
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-lg);
    opacity: 0.3;
    z-index: -1;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    animation: fadeInUp 0.8s var(--ease-out) 0.6s both;
}

.scroll-text {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-light);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.875rem 2rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1.5px solid transparent;
}

.btn-primary {
    background: var(--color-text);
    color: var(--color-text-inverse);
    border-color: var(--color-text);
}

.btn-primary:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(196, 149, 106, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-1px);
}

/* --- About Section --- */
.about {
    background: var(--color-bg-alt);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.about-text {
    font-size: 1.05rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
    line-height: 1.85;
}

.about-text strong {
    color: var(--color-text);
    font-weight: 600;
}

.about-image-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.06);
    transition: transform var(--transition-med);
}

.about-image-card:hover {
    transform: translateY(-4px);
}

.about-image-card img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.about-image-caption {
    padding: var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.caption-name {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 500;
}

.caption-title {
    font-size: 0.8rem;
    color: var(--color-text-light);
}

/* --- Expertise Section --- */
.expertise {
    background: var(--color-bg);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.expertise-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-xl) var(--space-lg);
    transition: all var(--transition-med);
    position: relative;
    overflow: hidden;
}

.expertise-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-med);
}

.expertise-card:hover {
    border-color: var(--color-accent-light);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
}

.expertise-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
    color: var(--color-accent);
}

.card-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.card-text {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.75;
}

/* --- Credentials Section --- */
.credentials {
    background: var(--color-bg-alt);
}

.credentials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-md);
}

.credential-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    text-align: center;
    transition: all var(--transition-med);
}

.credential-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
}

.credential-featured {
    background: var(--color-bg-dark);
    border-color: var(--color-bg-dark);
    grid-column: span 2;
}

.credential-featured .credential-title {
    color: var(--color-text-inverse);
    font-size: 1.5rem;
}

.credential-featured .credential-org {
    color: var(--color-accent-light);
}

.credential-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: rgba(196, 149, 106, 0.15);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

.credential-icon {
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
    display: flex;
    justify-content: center;
}

.credential-title {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.credential-org {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* --- Contact Section --- */
.contact {
    background: var(--color-bg);
}

.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
    line-height: 1.8;
}

.contact-links {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.contact-btn svg {
    flex-shrink: 0;
}

/* --- Portfolio Teaser --- */
.portfolio-teaser {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.teaser-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.teaser-text {
    font-size: 1.05rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* --- Footer --- */
.footer {
    background: var(--color-bg-dark);
    padding: var(--space-lg);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.footer-text {
    font-size: 0.8rem;
    color: var(--color-text-light);
}

/* --- Reveal Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delay for cards */
.expertise-card.reveal:nth-child(2) { transition-delay: 0.1s; }
.expertise-card.reveal:nth-child(3) { transition-delay: 0.2s; }

.credential-card.reveal:nth-child(2) { transition-delay: 0.08s; }
.credential-card.reveal:nth-child(3) { transition-delay: 0.16s; }
.credential-card.reveal:nth-child(4) { transition-delay: 0.24s; }
.credential-card.reveal:nth-child(5) { transition-delay: 0.32s; }

/* --- Keyframe Animations --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scrollPulse {
    0%, 100% { opacity: 1; transform: scaleY(1); }
    50% { opacity: 0.4; transform: scaleY(0.6); }
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .hero-container {
        gap: var(--space-lg);
    }

    .about-grid {
        gap: var(--space-lg);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .mobile-menu {
        display: flex;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: var(--space-2xl);
    }

    .hero-content {
        order: 1;
    }

    .hero-image {
        order: 0;
        max-width: 300px;
        margin: 0 auto;
    }

    .hero-image-accent {
        display: none;
    }

    .hero-tagline {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .about-image {
        order: -1;
        max-width: 320px;
        margin: 0 auto;
    }

    .expertise-grid {
        grid-template-columns: 1fr;
    }

    .credential-featured {
        grid-column: span 1;
    }

    .credentials-grid {
        grid-template-columns: 1fr 1fr;
    }

    .section-container {
        padding: var(--space-2xl) var(--space-md);
    }

    .scroll-indicator {
        display: none;
    }
}

@media (max-width: 480px) {
    .credentials-grid {
        grid-template-columns: 1fr;
    }

    .hero-name, .hero-accent {
        font-size: 2.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }
}