:root {
    --bg: linear-gradient(120deg, #434b65, #000516);
    --card: #161a23;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --accent: #7c7cff;
}

* {
    box-sizing: border-box;
    font-family: "Zalando Sans Expanded", sans-serif;
    font-weight: 400;
}

html {
    background: var(--bg);
}

body {
    margin: 0;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
}

/* NAV */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
}

.logo {
    font-weight: 700;
    font-size: 1.3rem;
}

.nav-links a {
    margin-left: 1.5rem;
    color: var(--text);
    text-decoration: none;
    font-size: 0.95rem;
}

.nav-links .btn {
    text-align: center;
    display: inline-block;
    padding: 0.75rem 1.25rem;
    border-radius: 0.5rem;
    text-decoration: none;
    margin: 0.5rem;
    font-size: 0.95rem;
    min-width: 120px;
}

.nav-links .btn:hover {
    opacity: 0.8;
    outline: #f3f4f6 2px solid;
    animation: bold 0.3s forwards;
}

@keyframes bold {
    0% {
        font-weight: 400;
    }

    100% {
        font-weight: 600;
    }
}

.nav-links .btn:active {
    animation: click 0.5s ease;
}

@keyframes click {
    20% {
        transform: translateY(5px) translateX(5px);
    }
}

/* AUTH LAYOUT */
.auth-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.auth-card {
    background: var(--card);
    padding: 2.5rem 3rem;
    border-radius: 1rem;
    width: 100%;
    max-width: 460px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.auth-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 1.75rem;
}

.tab-btn {
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: #1f2433;
    color: var(--text);
    padding: 0.65rem 0.9rem;
    border-radius: 0.6rem;
    cursor: pointer;
    transition: 0.2s ease;
}

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

.tab-btn.active {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
    font-weight: 600;
}

.auth-panel h1 {
    margin-top: 1rem;
}

.auth-panel .up {
    margin-top: -1.5rem;
}

.hidden {
    display: none;
}

.muted {
    color: var(--muted);
    margin-bottom: 3rem;
}

/* FORM */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group .tooltip {
    font-size: 0.8rem;
    color: var(--accent);
}

.form-group .strong {
    font-weight: 700;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

input {
    width: 100%;
    padding: 0.8rem;
    border-radius: 0.6rem;
    border: none;
    background: #22263a;
    color: var(--text);
    font-size: 1rem;
}

input:focus {
    outline: 2px solid var(--accent);
}

/* BUTTONS */
.btn {
    text-align: center;
    display: inline-block;
    padding: 0.75rem 1.25rem;
    border-radius: 0.5rem;
    text-decoration: none;
    margin: 0.5rem;
    font-size: 1rem;
    border: none;
    padding: 0.9rem;
    min-width: 120px;
    cursor: pointer;
}

.primary {
    background: var(--accent);
    color: #000;
}

.full {
    width: 100%;
    margin: 0.75rem 0 0;
}

.small {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.9rem;
}

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

/* FOOTER */
footer {
    text-align: center;
    padding: 1.5rem;
    font-size: 0.85rem;
    color: var(--muted);
}

/* TABLET */
@media (max-width: 1024px) {
    .nav {
        padding: 1rem 1.25rem;
    }
}

/* MOBILE */
@media (max-width: 600px) {
    .nav {
        flex-direction: row;
        gap: 0.5rem;
    }

    .nav-links {
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: flex-end;
        gap: 0.5rem;
        align-items: center;
    }

    .nav-links a {
        margin-left: 0.5rem;
    }

    .auth-card {
        padding: 2rem 1.5rem;
    }
}