/* =========================================================
   Fusga Student Auth — estilos
   Diseño moderno, responsive, con modo claro/oscuro automático
   ========================================================= */

.fusga-auth-wrap {
    --fa-bg: #ffffff;
    --fa-card: #ffffff;
    --fa-text: #0f172a;
    --fa-muted: #64748b;
    --fa-border: #e2e8f0;
    --fa-input: #f8fafc;
    --fa-primary: #6366f1;
    --fa-primary-2: #8b5cf6;
    --fa-primary-dark: #4f46e5;
    --fa-danger: #ef4444;
    --fa-success: #10b981;
    --fa-radius: 16px;
    --fa-shadow: 0 20px 50px -12px rgba(79, 70, 229, .25);

    display: flex;
    justify-content: center;
    padding: 32px 16px;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
    .fusga-auth-wrap {
        --fa-bg: #0b1120;
        --fa-card: #111827;
        --fa-text: #f1f5f9;
        --fa-muted: #94a3b8;
        --fa-border: #1f2937;
        --fa-input: #1e293b;
        --fa-shadow: 0 20px 50px -12px rgba(0, 0, 0, .6);
    }
}

.fusga-auth-wrap * { box-sizing: border-box; }

.fusga-auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--fa-card);
    border: 1px solid var(--fa-border);
    border-radius: var(--fa-radius);
    box-shadow: var(--fa-shadow);
    padding: 32px 28px;
    position: relative;
    overflow: hidden;
    animation: fusga-pop .45s cubic-bezier(.16,1,.3,1);
}

.fusga-auth-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--fa-primary), var(--fa-primary-2));
}

@keyframes fusga-pop {
    from { opacity: 0; transform: translateY(14px) scale(.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* Marca */
.fusga-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 15px;
    color: var(--fa-text);
    margin-bottom: 22px;
    letter-spacing: -.01em;
}
.fusga-brand-dot {
    width: 22px; height: 22px;
    border-radius: 7px;
    background: linear-gradient(135deg, var(--fa-primary), var(--fa-primary-2));
    box-shadow: 0 4px 12px rgba(99,102,241,.45);
}

/* Pestañas */
.fusga-tabs {
    position: relative;
    display: flex;
    background: var(--fa-input);
    border-radius: 12px;
    padding: 5px;
    margin-bottom: 24px;
}
.fusga-tab {
    flex: 1;
    border: none;
    background: transparent;
    padding: 11px 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--fa-muted);
    cursor: pointer;
    border-radius: 9px;
    z-index: 1;
    transition: color .25s;
}
.fusga-tab.active { color: #fff; }
.fusga-tab-slider {
    position: absolute;
    top: 5px; left: 5px;
    width: calc(50% - 5px);
    height: calc(100% - 10px);
    background: linear-gradient(135deg, var(--fa-primary), var(--fa-primary-2));
    border-radius: 9px;
    transition: transform .3s cubic-bezier(.16,1,.3,1);
    box-shadow: 0 4px 14px rgba(99,102,241,.4);
}
.fusga-tabs[data-active="register"] .fusga-tab-slider { transform: translateX(100%); }

/* Paneles */
.fusga-panel { display: none; animation: fusga-fade .35s ease; }
.fusga-panel.active { display: block; }
@keyframes fusga-fade {
    from { opacity: 0; transform: translateX(8px); }
    to   { opacity: 1; transform: translateX(0); }
}

.fusga-title { font-size: 20px; font-weight: 700; color: var(--fa-text); margin: 0 0 6px; }
.fusga-sub   { font-size: 13.5px; color: var(--fa-muted); margin: 0 0 20px; line-height: 1.5; }

/* Campos */
.fusga-form { display: flex; flex-direction: column; gap: 16px; }
.fusga-row  { display: flex; gap: 12px; }
.fusga-row .fusga-field { flex: 1; }

.fusga-field { display: flex; flex-direction: column; gap: 7px; }
.fusga-field > span {
    font-size: 13px;
    font-weight: 600;
    color: var(--fa-text);
}
.fusga-field input[type="text"],
.fusga-field input[type="email"],
.fusga-field input[type="password"] {
    width: 100%;
    padding: 12px 14px;
    font-size: 14.5px;
    color: var(--fa-text);
    background: var(--fa-input);
    border: 1.5px solid var(--fa-border);
    border-radius: 11px;
    transition: border-color .2s, box-shadow .2s, background .2s;
    outline: none;
}
.fusga-field input:focus {
    border-color: var(--fa-primary);
    background: var(--fa-card);
    box-shadow: 0 0 0 4px rgba(99,102,241,.14);
}

/* Mostrar/ocultar contraseña */
.fusga-pass-wrap { position: relative; }
.fusga-pass-wrap input { padding-right: 44px !important; }
.fusga-eye {
    position: absolute;
    right: 6px; top: 50%;
    transform: translateY(-50%);
    border: none; background: transparent;
    font-size: 16px; cursor: pointer;
    padding: 6px 8px; border-radius: 8px;
    opacity: .55; line-height: 1;
}
.fusga-eye:hover { opacity: 1; }

/* Medidor de fuerza */
.fusga-meter {
    height: 5px; border-radius: 99px;
    background: var(--fa-border);
    overflow: hidden;
}
.fusga-meter > span {
    display: block; height: 100%; width: 0;
    border-radius: 99px;
    transition: width .3s, background .3s;
}
.fusga-meter[data-level="1"] > span { width: 33%;  background: var(--fa-danger); }
.fusga-meter[data-level="2"] > span { width: 66%;  background: #f59e0b; }
.fusga-meter[data-level="3"] > span { width: 100%; background: var(--fa-success); }

.fusga-hint { font-size: 11.5px; color: var(--fa-muted); }

/* Checkbox recordar / términos */
.fusga-remember {
    display: flex; align-items: center; gap: 9px;
    font-size: 13px; color: var(--fa-muted); cursor: pointer;
}
.fusga-remember input { width: 16px; height: 16px; accent-color: var(--fa-primary); cursor: pointer; }

/* Honeypot oculto */
.fusga-hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* Botones */
.fusga-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 100%;
    padding: 13px 18px;
    font-size: 15px; font-weight: 600;
    border: none; border-radius: 11px;
    cursor: pointer; text-decoration: none;
    transition: transform .15s, box-shadow .2s, opacity .2s;
}
.fusga-btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--fa-primary), var(--fa-primary-2));
    box-shadow: 0 8px 20px -6px rgba(99,102,241,.6);
}
.fusga-btn-primary:hover { transform: translateY(-1px); box-shadow: 0 12px 26px -6px rgba(99,102,241,.7); }
.fusga-btn-primary:active { transform: translateY(0); }
.fusga-btn-primary[disabled] { opacity: .65; cursor: progress; transform: none; }
.fusga-btn-ghost {
    color: var(--fa-text);
    background: var(--fa-input);
    border: 1.5px solid var(--fa-border);
}
.fusga-btn-ghost:hover { border-color: var(--fa-primary); }

/* Enlaces tipo botón */
.fusga-link {
    background: none; border: none;
    color: var(--fa-primary);
    font-size: 13px; font-weight: 600;
    cursor: pointer; padding: 4px 0;
    align-self: center;
}
.fusga-link:hover { text-decoration: underline; }

/* Mensajes */
.fusga-msg {
    font-size: 13.5px; font-weight: 500;
    padding: 0; line-height: 1.45;
    max-height: 0; overflow: hidden;
    transition: max-height .3s, padding .3s;
    border-radius: 10px;
}
.fusga-msg.show { max-height: 120px; padding: 11px 14px; }
.fusga-msg.error   { background: rgba(239,68,68,.12);  color: var(--fa-danger); }
.fusga-msg.success { background: rgba(16,185,129,.12); color: var(--fa-success); }

/* Estado "ya logueado" */
.fusga-logged { text-align: center; }
.fusga-logged-icon {
    width: 56px; height: 56px; margin: 0 auto 14px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 26px; color: #fff;
    background: linear-gradient(135deg, var(--fa-success), #059669);
}
.fusga-logged h2 { color: var(--fa-text); margin: 0 0 6px; font-size: 20px; }
.fusga-logged p  { color: var(--fa-muted); margin: 0 0 20px; }
.fusga-logged-actions { display: flex; flex-direction: column; gap: 10px; }

/* Responsive */
@media (max-width: 460px) {
    .fusga-auth-card { padding: 26px 20px; }
    .fusga-row { flex-direction: column; gap: 16px; }
}