:root {
    --primary: #2f5d50;
    --primary-dark: #203f36;
    --primary-soft: #e8f0ed;
    --accent: #d5a84b;
    --background: #f4f7f5;
    --surface: #ffffff;
    --text: #1f2933;
    --muted: #667085;
    --border: #d7e1dc;
    --error: #b42318;
    --error-soft: #fdecea;
    --success: #2f7d45;
    --success-soft: #eaf6ec;
    --info: #245b8a;
    --info-soft: #e9f2fb;
    --shadow: 0 18px 42px rgba(31, 41, 51, 0.11);
    --radius: 16px;
    --max-width: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background: var(--background);
    line-height: 1.6;
}

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

a:hover {
    color: var(--primary-dark);
}

button,
input {
    font: inherit;
}

/* Header */

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
}

.navbar {
    width: min(100% - 2rem, var(--max-width));
    min-height: 74px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.brand {
    margin-right: auto;
    color: var(--primary-dark);
    font-size: 1.35rem;
    font-weight: 800;
}

.nav-links,
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-links a {
    padding-bottom: 0.2rem;
    font-weight: 600;
}

.nav-actions form {
    margin: 0;
}

/* Buttons */

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.7rem 1.1rem;
    border: 1px solid transparent;
    border-radius: 9px;
    font-weight: 700;
    cursor: pointer;
    transition:
            transform 0.2s ease,
            background-color 0.2s ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button-primary {
    color: #ffffff;
    background: var(--primary);
}

.button-primary:hover {
    color: #ffffff;
    background: var(--primary-dark);
}

.button-secondary {
    color: var(--primary-dark);
    background: var(--surface);
    border-color: var(--border);
}

.button-secondary:hover {
    color: var(--primary-dark);
    background: var(--primary-soft);
}

/* Login layout */

.auth-layout {
    width: min(100% - 2rem, var(--max-width));
    margin: 0 auto;
    padding: 4rem 0;
    flex: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(340px, 460px);
    align-items: center;
    gap: 5rem;
}

.auth-introduction {
    max-width: 650px;
}

.eyebrow {
    margin: 0 0 0.55rem;
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.auth-introduction h1 {
    margin: 0;
    color: var(--primary-dark);
    font-size: clamp(3rem, 6vw, 5rem);
    line-height: 1.04;
}

.auth-introduction > p:not(.eyebrow) {
    max-width: 600px;
    margin: 1.5rem 0;
    color: var(--muted);
    font-size: 1.1rem;
}

.auth-introduction ul {
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.8rem;
    list-style: none;
}

.auth-introduction li {
    position: relative;
    padding-left: 1.8rem;
    font-weight: 600;
}

.auth-introduction li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 900;
}

.auth-card {
    width: 100%;
    max-width: 460px;
    justify-self: end;
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.auth-card-heading h2 {
    margin: 0;
    color: var(--primary-dark);
    font-size: 2rem;
}

.auth-card-heading > p:not(.eyebrow) {
    margin-top: 0.4rem;
    color: var(--muted);
}

.auth-form {
    margin-top: 1.5rem;
    display: grid;
    gap: 1.2rem;
}

.form-group {
    display: grid;
    gap: 0.45rem;
}

.form-group label {
    color: var(--primary-dark);
    font-weight: 700;
}

.form-group input {
    width: 100%;
    max-width: 100%;
    min-height: 48px;
    padding: 0.75rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: 9px;
    color: var(--text);
    background: #ffffff;
}

.form-group input:focus {
    outline: 3px solid rgba(47, 93, 80, 0.14);
    border-color: var(--primary);
}

.submit-button {
    width: 100%;
    margin-top: 0.2rem;
}

.message {
    margin-top: 1rem;
    padding: 0.85rem 1rem;
    border: 1px solid transparent;
    border-radius: 9px;
    font-weight: 600;
}

.message-error {
    color: var(--error);
    background: var(--error-soft);
    border-color: rgba(180, 35, 24, 0.25);
}

.message-success {
    color: var(--success);
    background: var(--success-soft);
    border-color: rgba(47, 125, 69, 0.25);
}

.message-info {
    color: var(--info);
    background: var(--info-soft);
    border-color: rgba(36, 91, 138, 0.25);
}

.auth-switch {
    margin: 1.5rem 0 0;
    text-align: center;
    color: var(--muted);
}

.auth-switch a {
    font-weight: 800;
}

.back-link {
    display: block;
    margin-top: 0.7rem;
    text-align: center;
    font-size: 0.92rem;
    font-weight: 700;
}

/* Footer */

.site-footer {
    padding: 2.5rem max(1rem, calc((100% - var(--max-width)) / 2));
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: 2rem;
    color: #dbe8e3;
    background: var(--primary-dark);
}

.footer-brand {
    display: inline-block;
    margin-bottom: 0.4rem;
    color: #ffffff;
}

.site-footer div p,
.site-footer > p {
    margin: 0;
}

.site-footer nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.site-footer a {
    color: #ffffff;
}

.site-footer a:hover {
    color: var(--accent);
}

/* Responsive */

@media (max-width: 900px) {
    .navbar {
        padding: 1rem 0;
        flex-wrap: wrap;
    }

    .brand {
        width: 100%;
    }

    .nav-links,
    .nav-actions {
        flex-wrap: wrap;
    }

    .auth-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .auth-introduction {
        max-width: none;
    }

    .auth-card {
        width: min(100%, 540px);
        max-width: 540px;
        justify-self: start;
    }

    .site-footer {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 620px) {
    .navbar,
    .nav-links,
    .nav-actions {
        width: 100%;
        align-items: stretch;
        flex-direction: column;
    }

    .auth-layout {
        width: min(100% - 1rem, var(--max-width));
        padding: 2.5rem 0;
    }

    .auth-introduction h1 {
        font-size: 3rem;
    }

    .auth-card {
        padding: 1.2rem;
    }

    .button {
        width: 100%;
    }
}