/* ==========================================================================
   ZYNDHUX ACCOUNTS – SIGN IN
   Diseño profesional · Dark Mode First · Escalable
   Colores: Negro #000 | Blanco #FFF | Rojo #E10600
   ========================================================================== */

/* ------------------------------
   Variables globales
--------------------------------*/
:root {
    --color-bg: #000000;
    --color-surface: #0d0d0d;
    --color-border: #1f1f1f;

    --color-text: #ffffff;
    --color-text-muted: #b3b3b3;

    --color-primary: #e10600;
    --color-primary-hover: #ff1a1a;

    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;

    --font-main: system-ui, -apple-system, BlinkMacSystemFont,
                 "Segoe UI", Roboto, Ubuntu, Cantarell, sans-serif;

    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.8);
}

/* ------------------------------
   Reset básico
--------------------------------*/
*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
    margin: 0;
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-main);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* ------------------------------
   Layout principal
--------------------------------*/
.auth-container {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px 16px;
}

/* ------------------------------
   Header / Logo
--------------------------------*/
.auth-header {
    margin-bottom: 32px;
}

.auth-header .logo {
    height: 48px;
    width: auto;
}

/* ------------------------------
   Card principal
--------------------------------*/
.auth-card {
    width: 100%;
    max-width: 420px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-card);
}

.auth-card h1 {
    margin: 0 0 12px 0;
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -0.3px;
}

.auth-subtitle {
    margin: 0 0 24px 0;
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.4;
}

.auth-domain {
    font-size: 13px;
    opacity: 0.9;
}

/* ------------------------------
   Formulario
--------------------------------*/
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 13px;
    margin-bottom: 6px;
    color: var(--color-text-muted);
}

.form-group input {
    width: 100%;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background-color: #000;
    color: var(--color-text);
    font-size: 14px;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-group input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px rgba(225, 6, 0, 0.4);
}

/* ------------------------------
   Opciones del form
--------------------------------*/
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 8px 0 24px 0;
    gap: 12px;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-text-muted);
}

.checkbox input {
    accent-color: var(--color-primary);
    cursor: pointer;
}

.link {
    font-size: 13px;
    color: var(--color-primary);
    text-decoration: none;
}

.link:hover {
    text-decoration: underline;
}

/* ------------------------------
   Botón principal
--------------------------------*/
.btn-primary {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-md);
    border: none;
    background-color: var(--color-primary);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.05s ease;
}

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

.btn-primary:active {
    transform: scale(0.98);
}

/* ------------------------------
   Divider
--------------------------------*/
.divider {
    margin: 28px 0;
    height: 1px;
    background-color: var(--color-border);
}

/* ------------------------------
   Acciones alternativas
--------------------------------*/
.auth-alt {
    text-align: center;
}

/* ------------------------------
   Seguridad visible
--------------------------------*/
.auth-security {
    margin-top: 20px;
    font-size: 12px;
    color: var(--color-text-muted);
}

/* ------------------------------
   Footer
--------------------------------*/
.auth-footer {
    margin-top: 32px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    font-size: 12px;
    color: var(--color-text-muted);
}

.auth-footer a {
    color: var(--color-text-muted);
    text-decoration: none;
}

.auth-footer a:hover {
    color: var(--color-primary);
}

.auth-footer .lang {
    opacity: 0.8;
}

/* ------------------------------
   Responsive
--------------------------------*/
@media (max-width: 480px) {
    .auth-card {
        padding: 24px;
    }

    .auth-card h1 {
        font-size: 22px;
    }
}