/* ============================================================
   HJW Consulting — Design System
   Anthropic-inspired minimalism for life sciences advisory
   ============================================================ */

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

:root {
    --color-bg: #FAFAF8;
    --color-surface: #F0EFEB;
    --color-border: #E0DED8;
    --color-text: #1A1A1A;
    --color-text-secondary: #5C5C5C;
    --color-text-tertiary: #8A8A8A;
    --color-accent: #1A3A5C;
    --color-accent-light: #2A5A8C;
    --color-accent-subtle: #E8EEF4;
    --color-white: #FFFFFF;
    --color-success: #2D7D46;
    --color-error: #C53030;

    --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --font-display: 'Inter', system-ui, -apple-system, sans-serif;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 10rem;

    --radius: 6px;
    --radius-lg: 12px;
    --transition: 0.2s ease;
    --max-width: 1200px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
}

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

a:hover { color: var(--color-accent-light); }

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

/* --- Container --- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 250, 248, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease, background 0.3s ease;
}

.nav--scrolled {
    border-bottom-color: var(--color-border);
    background: rgba(250, 250, 248, 0.95);
}

.nav__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav__logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.nav__logo span {
    font-weight: 300;
    color: var(--color-text-secondary);
}

.nav__links {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
    align-items: center;
}

.nav__links a {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-weight: 450;
    transition: color var(--transition);
}

.nav__links a:hover { color: var(--color-text); }

.nav__cta {
    background: var(--color-accent);
    color: var(--color-white) !important;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius);
    font-weight: 500 !important;
    transition: background var(--transition) !important;
}

.nav__cta:hover {
    background: var(--color-accent-light) !important;
    color: var(--color-white) !important;
}

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

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    font-size: 0.95rem;
    font-weight: 500;
    font-family: var(--font-sans);
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1;
}

.btn--primary {
    background: var(--color-accent);
    color: var(--color-white);
}

.btn--primary:hover {
    background: var(--color-accent-light);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26, 58, 92, 0.2);
}

.btn--ghost {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn--ghost:hover {
    background: var(--color-surface);
    border-color: var(--color-text-tertiary);
    color: var(--color-text);
}

.btn--full { width: 100%; }

/* --- Hero --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl) var(--space-md) var(--space-2xl);
    position: relative;
    background: linear-gradient(175deg, var(--color-bg) 0%, var(--color-accent-subtle) 50%, var(--color-bg) 100%);
}

.hero__content {
    max-width: 720px;
    text-align: center;
}

.hero__eyebrow {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.hero__title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5.5vw, 4rem);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.hero__subtitle {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* --- Section --- */
.section {
    padding: var(--space-3xl) 0;
}

.section--muted {
    background: var(--color-surface);
}

.section__eyebrow {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.section__title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: var(--space-sm);
}

.section__lead {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    font-weight: 450;
}

.section__intro {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 640px;
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.section__content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    line-height: 1.8;
}

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

.section__grid {
    display: grid;
    gap: var(--space-xl);
    align-items: start;
}

.section__grid--about {
    grid-template-columns: 1.4fr 0.6fr;
}

.section__grid--contact {
    grid-template-columns: 1fr 1fr;
}

/* --- Stat Card --- */
.stat-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    position: sticky;
    top: 100px;
}

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

.stat-card__number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: -0.03em;
    line-height: 1;
}

.stat-card__suffix {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-accent);
}

.stat-card__label {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    margin-top: var(--space-xs);
    font-weight: 450;
}

/* --- Card Grid (Expertise) --- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.card__icon {
    width: 40px;
    height: 40px;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.card__icon svg {
    width: 100%;
    height: 100%;
}

.card__title {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    letter-spacing: -0.01em;
}

.card__text {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* --- Services --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.service {
    padding: var(--space-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition);
}

.service:hover {
    border-color: var(--color-accent);
}

.service__number {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: var(--space-sm);
}

.service__title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.service__text {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* --- Affiliations --- */
.affiliations {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.affiliation {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
}

.affiliation__name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.affiliation__role {
    font-size: 0.9rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.affiliation__detail {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

/* --- Contact Info --- */
.contact-info {
    margin-top: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.contact-info__item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.contact-info__item svg {
    width: 20px;
    height: 20px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.contact-info__item a {
    color: var(--color-text-secondary);
}

.contact-info__item a:hover {
    color: var(--color-accent);
}

/* --- Form --- */
.form {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.form__honeypot {
    position: absolute;
    left: -9999px;
    opacity: 0;
    height: 0;
    overflow: hidden;
}

.form__group {
    margin-bottom: var(--space-md);
}

.form__label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.4rem;
    color: var(--color-text);
}

.form__optional {
    font-weight: 400;
    color: var(--color-text-tertiary);
}

.form__input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    font-family: var(--font-sans);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.form__input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

.form__status {
    margin-top: var(--space-sm);
    font-size: 0.9rem;
    min-height: 1.5em;
}

.form__status--success { color: var(--color-success); }
.form__status--error { color: var(--color-error); }

/* --- Footer --- */
.footer {
    background: var(--color-text);
    color: var(--color-white);
    padding: var(--space-xl) 0;
}

.footer__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    text-align: center;
}

.footer .nav__logo {
    color: var(--color-white);
}

.footer .nav__logo span {
    color: rgba(255, 255, 255, 0.5);
}

.footer__tagline {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 0.25rem;
}

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

.footer__links a {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition);
}

.footer__links a:hover {
    color: var(--color-white);
}

.footer__copy {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.35);
}

/* --- Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 968px) {
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .section__grid--about { grid-template-columns: 1fr; }
    .section__grid--contact { grid-template-columns: 1fr; }
    .affiliations { grid-template-columns: 1fr; }
    .stat-card { position: static; flex-direction: row; justify-content: space-around; }
}

@media (max-width: 768px) {
    .nav__links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(250, 250, 248, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-md);
        gap: 0;
        border-bottom: 1px solid var(--color-border);
    }

    .nav__links.active { display: flex; }

    .nav__links li { width: 100%; }

    .nav__links a {
        display: block;
        padding: var(--space-sm) 0;
        border-bottom: 1px solid var(--color-border);
    }

    .nav__cta {
        text-align: center;
        margin-top: var(--space-sm);
        border-bottom: none !important;
    }

    .nav__toggle { display: flex; }

    .hero { min-height: 90vh; padding-top: calc(72px + var(--space-xl)); }
    .hero__title { font-size: 2rem; }
    .hero__actions { flex-direction: column; align-items: center; }
    .hero__actions .btn { width: 100%; max-width: 300px; }

    .card-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr; }
    .stat-card { flex-direction: column; }

    .section { padding: var(--space-2xl) 0; }
}

@media (max-width: 480px) {
    .hero__title { font-size: 1.75rem; }
    .section__title { font-size: 1.5rem; }
}

/* --- Font loading --- */
@font-face {
    font-family: 'Inter';
    src: url('https://fonts.gstatic.com/s/inter/v18/UcCo3FwrK3iLTcvmYwYZ90Rmkg.woff2') format('woff2');
    font-weight: 300;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Inter';
    src: url('https://fonts.gstatic.com/s/inter/v18/UcCo3FwrK3iLTcviYwYZ90Rmkg.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Inter';
    src: url('https://fonts.gstatic.com/s/inter/v18/UcCo3FwrK3iLTcvSYgYZ90Rmkg.woff2') format('woff2');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Inter';
    src: url('https://fonts.gstatic.com/s/inter/v18/UcCo3FwrK3iLTcvqYAYZ90Rmkg.woff2') format('woff2');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Inter';
    src: url('https://fonts.gstatic.com/s/inter/v18/UcCo3FwrK3iLTcuRYQYZ90Rmkg.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}