/* --- VARIABLES (Paleta Normie) --- */
:root {
    --color-primary: #0d6efd;       /* Azul estándar */
    --color-primary-hover: #0b5ed7;
    --color-text-dark: #212529;     /* Casi negro */
    --color-text-muted: #6c757d;    /* Gris texto */
    --color-border: #dee2e6;        /* Gris borde */
    --color-bg-body: #f8f9fa;       /* Gris muy claro fondo */
    --color-bg-card: #ffffff;       /* Blanco puro */
    --color-input-focus: rgba(13, 110, 253, 0.25);
    
    /* Variables de Mensajes (Solicitadas) */
    --msg-success-bg: #d4edda;
    --msg-success-text: #155724;
    --msg-success-border: #c3e6cb;
    
    --msg-danger-bg: #f8d7da;
    --msg-danger-text: #721c24;
    --msg-danger-border: #f5c6cb;
    
    --msg-warning-bg: #fff3cd;
    --msg-warning-text: #664d03;
    --msg-warning-border: #ffecb5;

    --font-stack: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* --- RESET & BASE --- */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font-stack);
    background-color: var(--color-bg-body);
    color: var(--color-text-dark);
    line-height: 1.5;
    min-height: 100vh;
}

/* --- LAYOUT --- */
.layout {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

/* --- AUTH CARD (Bloque Principal) --- */
.auth-card {
    background-color: var(--color-bg-card);
    width: 100%;
    max-width: 450px;
    padding: 2.5rem;
    border-radius: 8px; /* Bordes apenas redondeados */
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08); /* Sombra suave y profesional */
    border: 1px solid rgba(0,0,0,0.05);
}

.auth-card__header { text-align: center; margin-bottom: 2rem; }

.auth-card__logo { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--color-text-dark); }
.auth-card__logo-highlight { color: var(--color-primary); }

.auth-card__title { font-size: 1.5rem; font-weight: 600; margin-bottom: 0.5rem; }
.auth-card__subtitle { font-size: 0.9rem; color: var(--color-text-muted); }

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

/* --- FORM BEM --- */
.form { display: flex; flex-direction: column; gap: 1.25rem; }

.form__group { display: flex; flex-direction: column; gap: 0.5rem; }

.form__label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-dark);
}

.form__input-wrapper { position: relative; }

.form__icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    display: flex;
}

.form__input {
    width: 100%;
    padding: 10px 12px 10px 40px; /* Espacio para el icono */
    border: 1px solid var(--color-border);
    border-radius: 6px; /* Bootstrap style radius */
    font-size: 1rem;
    color: var(--color-text-dark);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form__input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-input-focus);
}

/* --- CHANNEL SELECTOR (Normie Style) --- */
.channel-selector { display: flex; gap: 10px; }

.channel-option {
    flex: 1;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    background-color: #fff;
}

/* Esconder radio button nativo */
.channel-option__input { display: none; }

.channel-option__content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--color-text-muted);
}

.channel-option__icon { display: flex; }
.channel-option__text { font-weight: 500; font-size: 0.95rem; }

/* Estado Hover */
.channel-option:hover { background-color: #f1f3f5; border-color: #adb5bd; }

/* Estado Activo (Modificador BEM) */
.channel-option--active {
    background-color: #e7f1ff; /* Azul muy clarito */
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.channel-option--active .channel-option__content { color: var(--color-primary); }

/* --- BUTTONS --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn--primary {
    background-color: var(--color-primary);
    color: white;
}
.btn--primary:hover:not(:disabled) { background-color: var(--color-primary-hover); }
.btn--primary:disabled { opacity: 0.65; cursor: not-allowed; }
.btn--full { width: 100%; }

/* --- LINKS --- */
.link { text-decoration: none; transition: color 0.2s; }
.link--primary { color: var(--color-primary); }
.link--primary:hover { text-decoration: underline; color: var(--color-primary-hover); }

/* --- ALERTAS / MENSAJES (Tu código solicitado) --- */
#message-area {
    margin-bottom: 1.5rem; /* Separación del form */
    padding: 12px 16px;
    border-radius: 6px;
    display: none;
    font-size: 0.9rem;
    opacity: 1;
    transition: opacity 0.5s ease-in-out;
}
#message-area.fade-out { opacity: 0; }

.message-success { background-color: var(--msg-success-bg); color: var(--msg-success-text); border: 1px solid var(--msg-success-border); }
.message-danger { background-color: var(--msg-danger-bg); color: var(--msg-danger-text); border: 1px solid var(--msg-danger-border); }
.message-warning { background-color: var(--msg-warning-bg); color: var(--msg-warning-text); border: 1px solid var(--msg-warning-border); }
.message-info { background-color: var(--msg-info-bg); color: var(--msg-info-text); border: 1px solid var(--msg-info-border); }

/* --- UTILS --- */
.btn__loader {
    display: none;
    width: 16px; height: 16px;
    border: 2px solid #fff;
    border-bottom-color: transparent;
    border-radius: 50%;
    animation: rotate 1s linear infinite;
    margin-left: 8px;
}
.btn--loading .btn__text { display: none; }
.btn--loading .btn__loader { display: block; margin: 0 auto; }

@keyframes rotate { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }