:root {
    --bg: #54565b;
    --shadow: 0 10px 30px rgba(0, 0, 0, .25);
    --radius: 18px;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
}

.auth-center {
    position: relative;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.logo-stack {
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    pointer-events: none;
    z-index: 2;
}

.brand-logo {
    display: block;
    height: 72px;
    width: auto;
    margin: 0 auto 8px;
    filter: drop-shadow(0 6px 14px rgba(0, 0, 0, .25));
}

.tagline-title {
    font-size: 22px;
    margin-top: 20px;
}

.tagline-1,
.tagline-title {
    font-weight: 600;
    letter-spacing: .2px;
}

.tagline-1 {
    margin-top: 15px;
}

.tagline-2 {
    margin: 8px 0 0;
    color: rgba(255, 255, 255, .85);
}

@media (max-width: 480px) {
    .brand-logo {
        height: 56px;
    }

    .logo-stack {
        top: 16px;
    }
}

/* ====== CARD ====== */
.auth-card {
    width: min(720px, 92vw);
    background: rgba(255, 255, 255, .08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 34px 32px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp .6s ease forwards;
    animation-delay: .2s;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-card h1 {
    margin: 0 0 6px;
    font-size: clamp(22px, 2.4vw, 28px);
}

.auth-card .muted {
    margin: 0 0 18px;
    color: rgba(255, 255, 255, .75);
}

/* ====== FORM ====== */
.login-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px 18px;
}

.login-form .field,
.login-form .form-row,
.login-form .btn {
    grid-column: 1 / -1;
}

@media (min-width: 720px) {
    .login-form .field:nth-of-type(1) {
        grid-column: 1 / 2;
    }

    .login-form .password-field {
        grid-column: 2 / 3;
    }
}

/* ====== CAMPOS ====== */
.field {
    margin-bottom: 0;
}

.field label {
    display: block;
    font-weight: 600;
    margin: 0 0 8px;
}

.field input {
    width: 100%;
    padding: 14px 14px;
    border: 1px solid rgba(255, 255, 255, .25);
    border-radius: 12px;
    outline: 0;
    background: rgba(255, 255, 255, .06);
    color: #fff;
    transition: border-color .2s, background .2s, box-shadow .2s;
}

.field input::placeholder {
    color: rgba(255, 255, 255, .55);
}

.field input:focus {
    border-color: var(--accent);
    background: rgba(255, 255, 255, .10);
    box-shadow: 0 0 0 4px rgba(255, 108, 0, .18);
}

.has-error input {
    border-color: rgba(255, 60, 60, .8);
}

.error {
    margin-top: 8px;
    font-size: 12px;
    color: #ffe1e1;
}

/* ====== SENHA COM TOGGLE ====== */
.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group input {
    padding-right: 44px;
}

.error-input {
    border-color: rgba(255, 60, 60, .9) !important;
    box-shadow: 0 0 0 3px rgba(255, 60, 60, .25);
}

.toggle-pass {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: #fff;
    cursor: pointer;
}

.toggle-pass i {
    font-size: 18px;
    pointer-events: none;
}

/* ====== CHECKBOX ====== */
.form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 4px;
    font-size: 14px;
}

.checkbox {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.checkbox input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

/* ====== BOTÃO ====== */
.btn {
    position: relative;
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 18px;
    border-radius: 12px;
    border: 0;
    font-weight: 700;
    letter-spacing: .2px;
    cursor: pointer;
    transition: transform .06s ease, box-shadow .2s, background .2s;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 8px 16px rgba(255, 108, 0, .35);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 3px solid rgba(255, 255, 255, .45);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .9s linear infinite;
}

.btn.loading .btn-label {
    opacity: .6;
}

.btn.loading .btn-spinner {
    display: inline-block;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ====== ALERTAS ====== */
.alert {
    width: 100%;
    margin: 0 0 14px;
    padding: 10px 12px;
    border-radius: 12px;
    font-size: 14px;
    backdrop-filter: blur(6px);
}

.alert.success {
    background: rgba(60, 180, 75, .2);
    border: 1px solid rgba(60, 180, 75, .35);
}

.alert.danger {
    background: rgba(255, 60, 60, .18);
    border: 1px solid rgba(255, 60, 60, .35);
}

.alert.danger ul {
    margin: 0;
    padding-left: 18px;
    list-style: none;
}

.alert.danger li {
    margin: 1px 0;
    font-size: 14px;
    color: #ffe1e1;
}