:root {
    --ink: #14201A;
    --ink-soft: #4B5A52;
    --paper: #F7F5EF;
    --paper-raised: #FFFFFF;
    --line: #E4E0D4;

    --accent: #3FAE8F;
    --accent-deep: #1A6E52;
    --accent-tint: #E6F7F1;

    --warn: #E7622B;
    --warn-tint: #FBEEE6;

    --font-display: "Fraunces", "Georgia", serif;
    --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;

    --transition-base: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-body);
    background: var(--paper);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.wrap {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    color: inherit;
}

/* ==========================================================================
     Header
     ========================================================================== */

header {
    padding: 26px 0;
    border-bottom: 1px solid var(--line);
    background: var(--paper-raised);
    position: relative;
}

header .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
    text-decoration: none;
    color: var(--ink);
}

.nav-buttons {
    display: flex;
    gap: 10px;
}

a.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.86rem;
    font-family: var(--font-body);
    border: none;
    cursor: pointer;
    transition: background var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

a.btn:active,
button.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: var(--ink);
    color: var(--paper);
}

.btn-primary:hover {
    background: var(--accent-deep);
}

.btn-secondary {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--line);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent-deep);
}

/* ---- Hamburger toggle (mobile only) ---- */

.nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
    content: "";
    display: block;
    width: 20px;
    height: 2px;
    background: var(--ink);
    position: relative;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle span::before {
    position: absolute;
    top: -6px;
}

.nav-toggle span::after {
    position: absolute;
    top: 6px;
}

.nav-toggle.is-open span {
    background: transparent;
}

.nav-toggle.is-open span::before {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-open span::after {
    transform: translateY(-6px) rotate(-45deg);
}

/* ==========================================================================
     Page head
     ========================================================================== */

.page-head {
    padding: 72px 0 44px;
}

.page-head h1 {
    font-family: var(--font-display);
    font-size: 2.15rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.25;
    max-width: 560px;
}

/* ==========================================================================
     Sections
     ========================================================================== */

section {
    padding: 44px 0;
    border-top: 1px solid var(--line);
}

section h2 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 14px;
    letter-spacing: -0.01em;
}

section p {
    color: var(--ink-soft);
    max-width: 560px;
    margin-bottom: 14px;
    font-size: 0.98rem;
}

section p:last-child {
    margin-bottom: 0;
}

/* ---- Principles grid ---- */

.principles {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
    margin-top: 26px;
}

.principle {
    background: var(--paper-raised);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 18px 20px;
}

.principle h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.principle p {
    font-size: 0.9rem;
    color: var(--ink-soft);
    margin-bottom: 0;
}

/* ==========================================================================
     Contact form
     ========================================================================== */

.contact-form {
    margin-top: 22px;
    max-width: 440px;
    background: var(--paper-raised);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 24px 26px;
}

.contact-form p {
    margin: 0 0 16px;
    max-width: none;
}

.contact-form p:last-of-type {
    margin-bottom: 0;
}

.contact-form label {
    display: block;
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--ink);
    background: var(--paper);
    box-sizing: border-box;
    transition: border-color var(--transition-base), background var(--transition-base);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--paper-raised);
}

.contact-form textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-form ul.errorlist {
    list-style: none;
    margin: 6px 0 0;
    padding: 0;
}

.contact-form ul.errorlist li {
    font-size: 0.8rem;
    color: var(--warn);
    font-weight: 600;
}

.contact-form .helptext {
    display: block;
    font-size: 0.78rem;
    color: var(--ink-soft);
    margin-top: 5px;
}

.contact-form button.btn {
    margin-top: 6px;
    width: 100%;
    justify-content: center;
    padding: 12px 18px;
    font-size: 0.92rem;
}

/* ==========================================================================
     Footer
     ========================================================================== */

footer {
    padding: 32px 0;
    border-top: 1px solid var(--line);
    margin-top: 12px;
}

footer .wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

footer p {
    font-size: 0.82rem;
    color: var(--ink-soft);
}

footer .links {
    display: flex;
    gap: 18px;
}

footer .links a {
    font-size: 0.82rem;
    color: var(--ink-soft);
    text-decoration: none;
}

footer .links a:hover {
    color: var(--ink);
}

@media (max-width: 600px) {
    .wrap {
        padding: 0 18px;
    }

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

    .page-head {
        padding: 44px 0 30px;
    }

    .page-head h1 {
        font-size: 1.55rem;
    }

    section {
        padding: 32px 0;
    }

    /* Hamburger mode */
    header .wrap {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .nav-buttons {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 10px;
        background: var(--paper-raised);
        border-bottom: 1px solid var(--line);
        padding: 16px 18px 20px;
        box-shadow: 0 10px 20px rgba(20, 32, 26, 0.06);
    }

    .nav-buttons.is-open {
        display: flex;
    }

    .nav-buttons a.btn {
        width: 100%;
        text-align: center;
    }

    .contact-form {
        padding: 20px 18px;
    }
}